In this Vehicle Platform Guide, you will find the top common issues of Volvo S60 (2003-2009) 2.5L Turbocharged Inline-5, along with their fault codes, and the solutions from eEuroparts.com.
The 2003-2009 Volvo S60 2.5T 2.5L Turbocharged Inline-5 is a spirited midsize luxury sedan that blends classic Scandinavian engineering with robust turbocharged performance. Positioned as a refined yet athletic offering in Volvo’s first-generation S60 lineup, it delivers confident handling, safety-focused design, and a distinctive five-cylinder soundtrack. Powered by a 2.5-liter turbocharged inline-5 petrol engine, it produces up to 209 PS (206 hp) and 320 Nm (236 lb-ft) of torque. Paired with a 5-speed manual or automatic transmission and front-wheel-drive or optional AWD, it accelerates from 0-100 km/h in approximately 7.6 seconds and reaches a top speed of 235 km/h (146 mph).
Specifications
Engine and Powertrain
Engine:
2.5L Turbocharged Inline-5
Engine Code:
B5254T2 / B5254T3
Horsepower:
208 hp @ 5,000 rpm
Torque:
236 lb-ft @ 1,500-4,500 rpm
Fuel Type:
Gasoline
Transmission:
5-Speed Automatic (AW55-50SN) or 5-Speed Manual (M56)
Fuel Economy (EPA Estimates)
City/Highway Combined:
~18-27 MPG (varies by drivetrain and year)
Vehicle Weight
Curb Weight:
~~3,651 lbs (AWD)
Gross Weight:
~4,470 lbs
Configurations and Submodels
Body Styles:
4-door Sedan,
Seating Capacity:
5-passenger
Drivetrain Options:
Front-Wheel Drive (FWD)
Top Common Issues with Volvo S60 (2003-2009) 2.5L Turbocharged Inline-5
Power Brake Booster
1. Power Brake Booster Failure
Fault Codes:
P0550 indicates power steering pressure sensor circuit fault; P0106 signals MAP sensor voltage out-of-range, affecting fuel delivery and idle.
Why it happens:
Power brake booster failure occurs due to vacuum leaks, diaphragm rupture, faulty check valve, corrosion, fluid intrusion, or electrical faults.
Symptoms:
Hard brake pedal - You’ll notice increased resistance when pressing the pedal, requiring more force to stop the vehicle due to lost vacuum assist.
Longer stopping distances - The car takes more time to come to a halt, even with firm pedal pressure, compromising braking efficiency.
Hissing noise when braking - A vacuum leak in the booster or its hose may produce a distinct hissing sound when the pedal is applied.
Engine stalling or rough idle during braking - A major vacuum leak can disrupt air-fuel balance, causing the engine to stumble or stall when brakes are used.
Brake warning lights or ABS alerts - Faulty booster operation may trigger dashboard indicators, especially if braking performance or system pressure is affected.
Parts to Replace
Volvo Brake Booster (w/DSTC) 300233 If you’re looking for a reliable and high-performance brake booster for your Volvo, the ATE Power Brake Booster is an excellent choice.
Volvo Brake Booster 300224 The ATE Power Brake Booster part number 300224 is a reliable replacement part for Volvo models.
ATE Volvo Brake Master Cylinder Position Sensor 370005 The ATE Power Brake Booster Vacuum Sensor part number 370005 is a premium quality component designed specifically for use in Volvo vehicles.
Parking brake shoe wear occurs from friction, heat, corrosion, poor adjustment, contamination, frequent use, aging material, or misalignment.
Symptoms:
Loose or ineffective parking brake - The vehicle may roll even when the parking brake is engaged, indicating the shoes can't hold tension properly.
Vibrating brake pedal - Worn shoes can cause uneven contact with the drum, leading to noticeable pedal pulsation during braking.
Scraping or squealing noises - Metal-on-metal contact from worn friction material may produce harsh sounds when the parking brake is applied.
Reduced stopping power - Though primarily for parking, worn shoes can affect emergency braking, increasing stopping distance or causing instability.
Spongy or soft brake pedal feel - Excessive clearance between shoes and drum due to wear can make the pedal feel less responsive or mushy.
Parts to Replace
Professional Parts Sweden 51993322 - Parking Brake Hardware Kit The Professional Parts Sweden Parking Brake Hardware kit is an excellent replacement option for your Volvo, compatible with part number 31262869.
Brake rotor failure occurs from overheating, warping, corrosion, pad wear, poor installation, aggressive braking, contamination, or excessive mechanical stress.
Symptoms:
Pulsating brake pedal - Warped or uneven rotors cause the brake pads to make inconsistent contact, resulting in a pulsing sensation when braking.
Vibrations in steering wheel or chassis - Especially during braking, vibrations may indicate rotor imbalance or excessive runout, often felt through the steering column.
Squealing or grinding noises - Worn or scored rotors can produce high-pitched squeals or harsh grinding sounds, especially when pads contact damaged surfaces.
Longer stopping distances - Reduced rotor surface integrity compromises friction, making the vehicle take longer to stop even with firm pedal pressure.
Visible scoring or cracks on rotor surface - Deep grooves, heat spots, or fractures seen during inspection signal advanced rotor wear and potential structural failure.
Parts to Replace
Front Part # 355107052 Hella Pagid 355107052 front disc brake rotor, high-carbon coated, 286mm vented, fits Volvo S60/S80/V70/XC70, ensures smooth braking.
Front control arm bushing failure occurs due to wear, heat, contamination, rough roads, poor installation, aging rubber, or misalignment.
Symptoms:
Clunking or knocking noises - You may hear sounds from the suspension when driving over bumps, braking, or turning due to loose or worn bushings.
Steering instability or wandering - The vehicle may pull to one side or feel loose at higher speeds, as worn bushings affect alignment and control.
Uneven tire wear - Damaged bushings allow excessive movement in the control arm, leading to irregular contact with the road and premature tire wear.
Vibrating steering wheel - Excess play in the suspension can transmit vibrations to the steering wheel, especially during acceleration or braking.
Reduced braking performance - Though not directly part of the braking system, worn bushings can cause instability during braking, making the front end feel unsettled.
Parts to Replace
Front Lower Rearward Part # K201720 The front lower rearward control arm bushing, rubber or polyurethane, absorbs road impact, reduces vibration, ensures alignment, fits subframe pivot point.
Front Lower (Inner Forward) Part # K201173 The Moog Suspension Control Arm Bushing part number K201173 is a high-quality aftermarket replacement that is designed for Volvo vehicles.
Rear shock absorber failure occurs due to seal wear, oil leaks, corrosion, rough terrain, overheating, contamination, or internal component damage.
Symptoms:
Excessive rear-end bounce or squat - After hitting bumps or accelerating, the rear of the vehicle may bounce repeatedly or sag, indicating poor damping control.
Uneven rear tire wear - Worn shocks allow inconsistent road contact, causing cupping or scalloping on the tread and reducing tire lifespan.
Fluid leaks on the shock body - Visible oil or residue around the shock absorber suggests internal seal failure, compromising its ability to dampen motion.
Clunking or rattling noises from the rear - Loose or worn shock mounts and bushings can produce noise during driving, especially over rough terrain.
Reduced braking stability and longer stopping distances - Faulty rear shocks affect weight transfer and tire grip, making the vehicle feel unstable during braking.
Stabilizer link failure occurs due to wear, corrosion, impact damage, bushing deterioration, overloading, poor installation, or extreme driving conditions.
Symptoms:
Clunking or rattling noises over bumps - Worn or loose stabilizer links often produce metallic sounds when driving over uneven surfaces or turning sharply.
Excessive body roll during cornering - Failed links reduce sway bar effectiveness, causing the vehicle to lean more than usual in turns.
Loose or imprecise steering - Handling may feel vague or delayed, especially during quick maneuvers, due to compromised suspension stability.
Uneven tire wear - Poor weight distribution from faulty links can lead to abnormal tread patterns, especially on the outer edges.
Vibrations in the steering wheel or cabin - Damaged links may transmit road vibrations more directly, making the ride feel rough or unstable.
Parts to Replace
Front BPSS32008 The Bison Performance Suspension Stabilizer Bar Link part number BPSS32008 is a high-quality replacement part that is specifically designed for use in Volvo vehicles.
Rear BPSS32007 The BPSS32007 Bison Performance Suspension Stabilizer Bar Link is a top-quality aftermarket part that is designed to deliver exceptional performance to your Volvo.
P0301-P0305 indicate misfires in cylinders 1-5-caused by ignition coil failure, spark plug wear, injector issues, vacuum leaks, or compression loss.
Why it happens:
Ignition coil failure occurs due to worn spark plugs, overheating, oil contamination, voltage spikes, poor wiring, moisture, or ECU faults.
Symptoms:
Engine misfires or rough idle - A weak coil can't deliver proper spark, causing uneven combustion, shaking, or hesitation at idle and acceleration.
Check engine light with codes like P0300-P0305 or P0351-P0355 - These indicate misfires or coil circuit faults tied to specific cylinders.
Hard starting or stalling - Inadequate spark delays ignition or causes the engine to shut off unexpectedly, especially when hot or under load.
Poor fuel economy - Incomplete combustion forces the ECU to inject more fuel, reducing mileage and increasing emissions.
Backfiring or fuel smell from exhaust - Unburned fuel due to weak spark may ignite in the exhaust, producing loud bangs or a strong odor.
Parts to Replace
Bosch Volvo Ignition Coil 0221604008 The Bosch 0221604008 Direct Ignition Coil is an aftermarket replacement part designed to fit a wide range of Volvo vehicles.
Hitachi Volvo Ignition Coil IGC0142 The Hitachi IGC0142 Direct Ignition Coil is a high-quality replacement part designed specifically for Volvo vehicles.
P0551 indicates power steering pressure sensor circuit range/performance fault; caused by sensor failure, wiring issues, or fluid pressure irregularities.
Why it happens:
Power steering pump failure occurs due to fluid leaks, seal wear, contamination, overheating, belt damage, aging, or excessive pressure.
Symptoms:
Whining or groaning noises when turning - A failing pump often emits high-pitched or growling sounds, especially during low-speed maneuvers or full-lock turns.
Stiff or heavy steering feel - Loss of hydraulic pressure makes the steering wheel harder to turn, particularly noticeable at idle or low speeds.
Fluid leaks around the pump or reservoir - Leaking seals or cracked hoses can cause visible fluid loss, reducing system pressure and performance.
Jerky or inconsistent steering response - The wheel may feel erratic or unresponsive due to fluctuating pressure or internal pump wear.
Metal flakes in power steering fluid - Internal pump damage can shed debris into the fluid, riskig contamination of the entire steering system.
Parts to Replace
Volvo Power Steering Pump KS01000062 Bosch KS01000062 rebuilt power steering pump, OEM for Volvo KS01000062, fits S60/S80/V70/XC90, restores hydraulic steering assist.
Rack and pinion bellows fail due to age, cracking, impact damage, torn boots, contamination, poor installation, or excessive steering stress.
Symptoms:
Visible cracks or tears in the bellows - Physical damage exposes the inner rack to dirt, moisture, and debris, accelerating wear and corrosion.
Grease leakage around the bellows - Torn boots may leak lubricant, leaving residue on the steering rack or suspension components.
Clunking or knocking noises when turning - Contaminants entering through damaged bellows can degrade internal components, causing audible steering noise.
Stiff or inconsistent steering - Loss of protection can lead to rack binding or uneven gear wear, making steering feel jerky or resistant.
Premature inner tie rod wear - Without sealed protection, tie rod joints may degrade faster due to exposure to road grime and moisture.
Parts to Replace
Lemfoerder Volvo Tie Rod Boot - Front Inner 3024901 The Lemforder Rack and Pinion Bellows part number 3024901 for Volvo is an essential component designed to protect the steering mechanism from dirt, debris and moisture.
Rein Volvo Rack and Pinion Bellows Kit BKK0150 The Rein Rack and Pinion Bellows Kit part number BKK0150 is a must-have for all Volvo owners looking to improve the handling and performance of their car.
P0171 flags lean fuel mix in Bank 1; P0507 signals idle RPM too high-often vacuum leaks or throttle body issues.
Why it happens:
PCV oil trap failure occurs due to sludge buildup, clogged passages, degraded seals, poor ventilation, heat stress, or neglected maintenance.
Symptoms:
Excessive oil consumption or leaks - A clogged or stuck PCV system builds crankcase pressure, forcing oil past seals and gaskets, often visible under the car.
Blue smoke from exhaust - Oil pushed into the intake or combustion chamber burns off, producing bluish smoke-especially during acceleration or idle.
Rough idle or misfires - Poor ventilation disrupts air-fuel ratios, causing unstable idle, misfiring, or hesitation during throttle input.
Sludge buildup in engine - Trapped blow-by gases mix with oil, forming sludge that coats internal components and reduces lubrication efficiency.
Check engine light with lean codes (e.g., P0171) - Vacuum leaks or airflow imbalance from a faulty oil trap can trigger fuel trim errors and diagnostic trouble codes.
P0102 signals low input from the MAF sensor-often caused by dirt, wiring faults, intake leaks, or sensor failure.
Why it happens:
MAF sensor failure occurs due to dirt buildup, oil contamination, faulty wiring, heat damage, aging, moisture intrusion, or poor filtration.
Symptoms:
Rough idle or stalling - A faulty MAF disrupts air-fuel balance, causing unstable idle or engine shutdown during stops or low RPMs.
Poor acceleration or hesitation - Inaccurate airflow readings lead to lean or rich mixtures, making throttle response sluggish or jerky.
Check engine light with codes like P0102 or P0171 - The ECU detects abnormal airflow data and flags it with diagnostic trouble codes.
Black exhaust smoke or fuel smell - Excess fuel from rich conditions may produce dark smoke or a strong gasoline odor from the tailpipe.
Decreased fuel economy - The ECU may overcompensate for bad readings, injecting more fuel than needed and reducing mileage.
Parts to Replace
Mass Air Flow Sensor Part # 0280218335 Bosch 0280218335 MAF sensor, OEM for Volvo 31342362, ceramic/plastic housing, ensures precise airflow readings, improves fuel efficiency and emissions.
Volvo Mass Air Flow Sensor 0280218088 Bosch 0280218088 MAF sensor, OEM for Volvo 0280218088, plastic housing, ensures accurate airflow readings, supports fuel efficiency and emissions.
Pierburg 7.28342.15.0 - Mass Air Flow Sensor The Pierburg Mass Air Flow Sensor part number 7.28342.15.0 is an essential component for Porsche and Volvo vehicles.
P0201-P0205 indicate injector circuit faults in cylinders 1-5, while P0300-P0305 signal random and specific misfires in those same cylinders-often caused by wiring issues, faulty injectors, ignition failures, or ECU problems.
Why it happens:
Fuel injector failure occurs due to clogging, electrical faults, seal wear, heat damage, poor fuel quality, corrosion, or ECU miscommunication.
Symptoms:
Engine misfires or rough idle - A clogged or malfunctioning injector disrupts fuel delivery, causing uneven combustion and noticeable shaking or hesitation at idle.
Poor acceleration or throttle response - Inadequate fuel flow leads to sluggish performance, especially during rapid throttle input or uphill driving.
Check engine light with codes like P0201-P0205 or P0300-P0305 - These indicate injector circuit faults or misfires in specific cylinders due to fuel delivery issues.
Fuel odor or visible leaks - A cracked injector or damaged seal may leak fuel, producing a strong smell or wet spots near the fuel rail.
Increased fuel consumption or failed emissions test - Faulty injectors can cause rich or lean mixtures, reducing efficiency and elevating exhaust pollutants.
P0191 flags fuel rail pressure sensor circuit range/performance fault-often caused by erratic readings, wiring issues, or sensor malfunction.
Why it happens:
Fuel pressure sensor failure occurs due to contaminated fuel, electrical faults, sensor wear, heat stress, poor calibration, or wiring issues.
Symptoms:
Hard starting or no start - The engine may crank excessively or fail to start due to incorrect fuel pressure readings disrupting fuel delivery.
Poor engine performance or hesitation - Acceleration may feel sluggish or uneven as the ECU struggles to maintain proper fuel-air ratios.
Check engine light with codes like P0190 or P0191 - Faulty sensor signals trigger diagnostic trouble codes and illuminate the warning light.
Engine stalling or surging - Inconsistent fuel pressure can cause the engine to shut off unexpectedly or surge during steady driving.
Increased fuel consumption - The ECU may overcompensate with excess fuel, leading to reduced mileage and rich running conditions.
Parts to Replace
Bosch Volvo Fuel Pressure Sensor - 0261230110 The Bosch Manifold Absolute Pressure Sensor (Part No: 0261230110) is a top-of-the-line car part that offers excellent performance for your Volvo.
Loss of engine power or sluggish acceleration - The vehicle feels underpowered, especially during uphill climbs or overtaking, due to reduced boost pressure
Excessive exhaust smoke - Blue or gray smoke from the tailpipe often signals oil leaking into the exhaust from worn turbo seals.
Whining or rattling noises - A failing turbo may produce high-pitched whines, grinding, or siren-like sounds during acceleration, indicating internal damage.
Increased oil consumption - Frequent top-ups or visible leaks around the turbo suggest seal failure or bearing wear.
Check engine light with boost-related fault codes - Codes like P0234 (overboost), P0299 (underboost), or P0244 (wastegate solenoid fault) often accompany turbo issues.
Parts to Replace
Proparts Volvo Turbocharger (New) 23432369 The Professional Parts Sweden Turbocharger part number 23432369 is an excellent choice for any Volvo owner looking to boost their vehicle’s performance.
Rough or unstable idle - The engine may idle erratically, surge, or stall due to poor airflow regulation or carbon buildup on the throttle plate.
Poor acceleration or throttle lag - Hesitation or delayed response when pressing the accelerator often points to actuator or sensor faults within the throttle body.
Check engine light with codes like P2111 or P2112 - These indicate the throttle actuator is stuck open or closed, disrupting airflow and triggering fault codes.
Engine stalling at low speeds or idle - Inadequate air supply from a malfunctioning throttle body can cause the engine to shut off unexpectedly.
Increased fuel consumption - A faulty throttle body may mismanage the air-fuel ratio, leading to rich conditions and reduced mileage.
Parts to Replace
Professional Parts Sweden 21436753 - Fuel Injection Throttle Body Mounting Gasket part number 21436753 is an essential component of your Volvo’s engine system.
Bosch Volvo Throttle Body 0280750131 Bosch 0280750131 throttle body, OEM for Volvo 30711554, plug-and-play, aluminum housing, fits S60-XC90, requires VIDA calibration.
Fuel pump failure occurs due to overheating, low fuel levels, clogged filters, poor wiring, corrosion, voltage drops, or impeller wear.
Symptoms:
Hard starting or no start - The engine may crank but fail to start due to insufficient fuel pressure or complete pump failure.
Engine sputtering or stalling - Inconsistent fuel delivery causes hesitation, sputtering at high speeds, or sudden engine shutdowns-especially under load.
Loss of power during acceleration or uphill driving - A weak pump can't meet fuel demands, leading to sluggish performance or inability to climb inclines.
Unusual whining noise from fuel tank - A failing pump often emits a high-pitched hum or whine, especially when struggling to maintain pressure.
Decreased fuel efficiency or surging - Irregular fuel flow leads to poor mileage or erratic speed changes as the engine receives inconsistent fuel supply.
P0562 indicates low system voltage-often caused by a weak battery, faulty alternator, poor wiring, bad voltage regulator, or parasitic drain.
Why it happens:
Alternator failure occurs due to worn bearings, diode damage, voltage regulator faults, belt issues, fluid leaks, heat, or overload.
Symptoms:
Dim or flickering headlights - A weak alternator can't maintain consistent voltage, causing headlights and interior lights to fade or pulse, especially at idle.
Battery warning light or dead battery - The dashboard battery icon may glow due to low charging voltage. Eventually, the battery drains from lack of alternator support.
Electrical issues or slow accessories - Power windows, infotainment, or climate controls may lag or fail as the alternator struggles to supply adequate current.
Strange noises or burning smell - Failing bearings or a slipping belt can cause whining or grinding sounds. Overheating may produce a burnt rubber or electrical odor.
Engine stalling or hard starts - Without proper voltage, ignition and fuel systems falter, leading to rough starts, misfires, or sudden engine shutdowns.
BBB Industries Alternator (140 AMP) Part # 13801 The BBB Industries Alternator part number 13801 for Volvo is a reliable and high-quality product that will keep your vehicle’s electrical system running smoothly.
1. Automatic Transmission Servo Cover Seal Failure
Fault Codes:
The issue may trigger transmission-related codes such as P0733 (Gear 3 Incorrect Ratio) or P0734 (Gear 4 Incorrect Ratio). These codes appear when slipping occurs due to hydraulic pressure loss inside the transmission.
Why it happens:
The AW55-50SN automatic transmission used in the Volvo S60 relies on servo pistons to apply the bands that control gear engagement. Over time, the servo cover seals-small rubber O-rings-begin to harden, shrink, or tear, especially in high-mileage vehicles.When these seals fail, the transmission loses hydraulic pressure, causing the gear bands to slip instead of holding firmly. Heat cycles, degraded transmission fluid, and normal wear accelerate the breakdown of these seals.This is a very common age-related failure on Volvos equipped with this transmission.
Symptoms:
Drivers typically notice symptoms developing gradually, especially when the transmission warms up.
Harsh or Delayed Shifting: A noticeable delay when shifting into 2nd, 3rd, or 4th gear.
Gear Slip Under Acceleration: Engine revs increase without proportional movement, especially during passing or climbing hills.
Erratic Downshifts: Sudden or inconsistent downshifting at low speeds.
“Transmission Service Required” Warning: Appears as the control module detects slipping.
Failure When Hot: Symptoms often worsen as the fluid temperature increases.
Shuddering or Jerking: Felt during mid-range gear changes.
Parts to Replace
URO Parts 30751262 - Automatic Transmission Servo Cover Seal Kit Automatic Transmission Servo Cover Seal Kit - Restores Proper Hydraulic Pressure and Gear Engagement, Includes replacement O-rings for the transmission servo covers to eliminate internal fluid leaks and restore correct band operation.
ABS-0022 / ABS-0023: Wheel speed sensor signal faults,
Symptoms:
BCM-0070: Faulty wheel sensor due to contamination
Why it happens: The CV joint boot is made of flexible rubber designed to keep grease inside the joint and dirt out. Over time, this material naturally dries, cracks, or splits-especially in vehicles exposed to heat, road debris, and sharp steering angles. Once the boot tears, grease leaks out, and contaminants enter the joint.
If not addressed early, the CV joint runs dry and begins to wear rapidly, ultimately leading to clicking noises, vibration, or complete axle failure.
Symptoms:
Grease Splatter on Wheel or Suspension: One of the most common early signs-visible grease around the inner or outer wheel area.
Clicking Noise When Turning: Especially during sharp turns, indicating the joint has lost lubrication and is wearing out.
Vibration During Acceleration: Caused by internal CV joint wear.
Torn or Split Rubber Boot: Often found on routine inspections or during an oil service.
Clunking Sounds Over Bumps: Advanced CV joint deterioration.
ABS Warning Light: If grease contaminates the wheel-speed sensor.
Parts to Replace
Rein BKS0037R - CV Joint Boot Kit (Front Inner and Outer) A complete boot service kit designed to restore proper lubrication and sealing of the CV joint. Includes replacement boot, clamps, and CV grease for a full repair. Prevents premature axle wear and ensures smooth driveline operation.
Heater core leaks occur from corrosion, aging seals, coolant neglect, physical damage, pressure buildup, or manufacturing defects over time.
Symptoms:
Sweet smell inside the cabin - Coolant has a distinct syrupy scent. If you notice it while driving, especially with the heater on, it’s a strong sign of a leak.
Foggy or greasy windshield - Vaporized coolant can coat the inside of the glass, creating a hazy film that smears when wiped and reduces visibility.
Wet passenger-side carpet - Leaking coolant often drips down behind the dashboard, soaking the floor mat or carpet near the firewall.
Low coolant level without visible engine leaks - If you’re frequently topping off coolant but can’t find external leaks, the heater core may be the culprit.
Steam from dashboard vents - In severe cases, hot coolant vapor escapes through the HVAC system, producing visible steam and a strong chemical odor.
P0550 - P0554: Power Steering / Brake Booster Vacuum Pressure Sensor Range or Performance, P0171: System Too Lean (caused by vacuum leak from the pump), P2187/P2189: Lean at Idle.
Why it happens:
The vacuum pump on the 2.5L turbo engine is driven directly off the camshaft. Over time, its internal seals wear out, causing oil leakage and reduced vacuum output. The aluminum housing can also warp slightly from heat cycles, allowing oil to seep onto the transmission, engine mount, or down the back of the block. When vacuum output drops, essential systems like the brake booster no longer receive steady vacuum, creating drivability and safety concerns..
Symptoms:
Hard Brake Pedal: Increased stopping distance or a “wooden” brake feel as booster vacuum drops.
Engine Oil Leak (Back of Engine): Oil dripping down onto the transmission, turbo area, or subframe.
Burning Oil Smell: Oil from the pump leaking onto hot exhaust components.
Rough Idle or Lean Codes: Vacuum leak affects air-fuel mixture.
Inconsistent Boost or Hesitation: The engine may struggle under load due to vacuum fluctuations.
Increased Engine Bay Smoke: Especially after longer drives, due to oil contact with hot surfaces.
Parts to Replace
OEM 30744402 - Vacuum Pump - OEM Volvo A complete replacement of the vacuum pump restores proper vacuum pressure and resolves leaks caused by worn internal seals. A new pump ensures dependable brake booster performance and eliminates oil seepage commonly found on aging S60 2.5L engines.
eEuroparts offers a wide selection of OEM and well-reviewed aftermarket parts chosen for compatibility with Volvo S60 (2003-2009) 2.5L vehicles. Parts are listed with fitment details and trusted brand options to help you find components that are appropriate for routine maintenance and common repairs.
Exceptional Delivery, Unmatched Logistics
We know that every moment counts when your car is out of commission. That’s why we focus on getting your parts to you as quickly as possible. Our efficient logistics network and fast shipping mean minimal downtime for your vehicle.
Competitive Prices, Superior Value
Our catalog includes everything from timing chains, camshaft adjusters, and PCV valves to wheel bearings, control arms, and fuel pumps, sourced to meet or exceed OE standards. Whether you prefer genuine Mercedes-Benz parts or trusted aftermarket brands, we offer top-tier quality at better-than-dealer pricing.
Trusted Excellence
Our catalog includes parts from top-tier brands like Bosch, INA, ZF, Pierburg, Elring, Lemforder, and Rein. Whether you're resolving transmission issues, electrical faults, or suspension wear, our parts meet or exceed OEM standards for fit, durability, and performance.
Conclusion
Whether you’re replacing worn items or addressing a specific fault, use these listings to identify likely parts and plan repairs. For vehicle-specific advice, consult a trusted technician to confirm fitment and service steps before installation.
Frequently Asked Questions
Why does my Volvo S60 2.5L have rough idling or hesitation?⌄
Rough idle is commonly caused by a failing PCV system, vacuum leaks, dirty throttle body, or a faulty MAF sensor. Volvo’s PCV breather box clogs over time, increasing crankcase pressure and causing idle instability and oil leaks.
What causes oil leaks around the engine on this model?⌄
Oil leaks typically come from a clogged PCV/oil trap system, worn camshaft seals, or a failing rear main seal. Over time, crankcase pressure builds and forces oil out of weak points.
Why am I getting “Engine System Service Required” or boost-related warnings?⌄
These warnings often indicate a faulty Turbo Control Valve (TCV), boost leak, worn intercooler hoses, or wastegate control issues. Reduced boost causes sluggish acceleration and inconsistent power delivery.
What causes the turbo to whistle loudly or lose boost?⌄
Turbo whistling or low boost is often due to vacuum leaks, a cracked boost pipe, worn CBV (Compressor Bypass Valve), or failing wastegate actuator. In advanced wear cases, turbo bearings may be worn.
What causes coolant loss with no visible leaks?⌄
Coolant disappearing is often related to a failing radiator, heater core seepage, turbo coolant line leaks, or early-stage head gasket wear. Pressure testing helps identify internal or hidden losses.
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