BMW X7 xDrive40i 3.0L Turbocharged Inline-6 Platform Guide (2019–2022):

Why it happens:

Brake pad wear sensor failure occurs due to heat damage, corrosion, wiring faults, debris buildup, or improper installation during pad replacement.

Symptoms:

• Brake warning light stays on – Even after replacing pads, the dashboard light may remain illuminated due to a faulty sensor.
• Unusual brake noises – Grinding or squealing sounds might persist if the sensor misreads pad thickness or fails to alert timely.
• Delayed braking response – A malfunctioning sensor can lead to unnoticed pad wear, causing reduced braking efficiency.
• ABS or traction control alerts – Some systems integrate pad sensors with ABS; failure may trigger related warning lights.
• Intermittent brake alerts – Flickering or inconsistent brake system warnings often point to sensor wiring or signal issues.

Parts to Replace

• OEM BMW Disc Brake Pad Wear Sensor - Front Part # 34356870353 BMW front brake pad wear sensor monitors pad thickness, triggers warning light when worn, and must be replaced with new pads.
• Genuine BMW 2905291 - Disc Brake Pad and Rotor Kit (Rear).
• Genuine BMW 3022735 - Disc Brake Pad and Rotor Kit (Front).

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• Genuine BMW

Why it happens:

Electronic parking brake motor faults occur due to wiring issues, servo failure, corrosion, low voltage, software glitches, or mechanical wear.

Symptoms:

• Parking brake warning light stays on – Even after disengaging the brake, the dashboard light remains illuminated, signaling a motor or system issue.
• Brake won’t engage or release – Pressing the button yields no response, often due to motor failure or electrical disconnection.
• Clicking or whirring noises – Unusual sounds from the rear wheels when activating the brake may indicate a struggling or stuck motor.
• Dashboard error messages – Alerts like “Parking Brake Error” or “Check Parking Brake” suggest a fault in the motor or control module.
• Vehicle won’t move or drags – If the brake doesn’t release properly, the car may feel sluggish or resist movement, especially from a standstill.

Parts to Replace

• OEG Parking Brake Actuator - Rear Part # OEG-1660 OEG-1660 rear parking brake actuator fits BMW X3/X5/X6/X7, provides electric brake control, OEM quality, and reliable engagement.

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• Genuine BMW
  

Why it happens:

Suspension control arm failure occurs due to worn bushings, ball joint fatigue, corrosion, impact damage, poor alignment, or aggressive driving.

Symptoms:

• Clunking noises over bumps often signal worn bushings or ball joints, especially when braking or turning.
• Steering wander or pulling occurs when the control arm no longer maintains proper wheel alignment, making the vehicle drift left or right.
• Uneven tire wear—typically on the inner or outer edges—results from misaligned suspension geometry due to control arm degradation.
• Excessive vibration in the steering wheel suggests loose or damaged control arm components failing to dampen road feedback.
• Poor handling or unstable cornering stems from compromised control arm rigidity, reducing chassis stability during turns.

Parts to Replace

• Rear Driver Side (Upper Forward) (With Bushings) Part # 33306878017 The Genuine BMW Suspension Control Arm part number 33306878017 is a high-quality replacement part for your BMW’s suspension system.
• Front Right Upper 31106883116 The Genuine BMW Suspension Control Arm part number 31106883116 is an essential component for every BMW owner who wants to ensure smooth handling and optimal driving experience.
• Rear Passenger Side (Upper Forward) (With Bushings) Part # 33306878018 The Genuine BMW Suspension Control Arm part number 33306878018 is an essential component for maintaining the performance and safety of your BMW.
• Rear Left Upper Rearward Part # 42639 01 LEMFÖRDER 42639 01 is a genuine rear left upper control arm for BMW X5/X6/X7, ensuring precise suspension geometry and durability.

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• Genuine BMW
• Lemforder
  

Why it happens:

Stabilizer bar link failure occurs due to wear, corrosion, impact, bushing degradation, overloading, poor lubrication, or harsh road conditions.

Symptoms:

• Clunking or rattling noises over bumps suggest worn or loose links, especially when driving on uneven surfaces or turning.
• Excessive body roll during cornering indicates the sway bar isn’t stabilizing the chassis properly due to failed links.
• Poor handling or loose steering feel results from reduced suspension rigidity and compromised link performance.
• Uneven tire wear—especially on one side—can stem from destabilized suspension geometry caused by faulty links.
• Vibrations in the steering wheel during turns or lane changes may point to degraded bushings or disconnected sway bar ends
  .

Parts to Replace

• Front Passenger Side Part # 31356881808 The Genuine BMW Suspension Stabilizer Bar Link Kit part number 31356881808 is designed to enhance the overall performance of your BMW vehicle.
• Front Driver Side Part # 31356881807 The Genuine BMW Suspension Stabilizer Bar Link Kit part number 31356881807 is the perfect solution for those seeking to enhance their BMW’s driving experience.
• Front (Driver Side) (Steel) BMW BPSS03352 is a genuine steel front driver-side stabilizer link for BMW X5/X6/X7, ensuring stability, durability, and precision.
• Front Passenger Side BPSS03351 Bison Performance BPSS03351 is a steel front passenger-side stabilizer link for BMW X5/X6/X7, ensuring OE fit and handling.

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• Genuine BMW
• Bison Performance
  

Why it happens:

Crankshaft position sensor failure occurs due to heat damage, vibration, oil contamination, wiring faults, magnetic interference, or mechanical wear.

Symptoms:

• Check Engine Light activates, often triggered by fault code P0335 due to signal loss or timing inconsistencies.
• Engine stalls or fails to start, especially during low-speed driving or cold starts, as the ECU loses crankshaft position data.
• Poor acceleration or hesitation, caused by incorrect ignition timing and disrupted fuel delivery.
• Rough idle or engine misfires, resulting from erratic sensor signals affecting combustion synchronization.
• Reduced fuel efficiency and increased emissions, as the ECU defaults to conservative timing maps without accurate crankshaft input.

Parts to Replace

• OEM BMW Engine Crankshaft Position Sensor 13627806782 The Genuine BMW Engine Crankshaft Position Sensor part number 13627806782 / 13 62 7 806 782 is the perfect replacement part for your BMW.
• Hella BMW Mini Engine Crankshaft Position Sensor 013122801 BMW/Mini crankshaft sensor 013122801 is a 3-pin Hall-effect unit; OEM-grade, ensures precise timing, reliable starts, and smooth performance.

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• Genuine BMW
• Hella

Why it happens:

Steering column noise occurs due to worn bearings, loose joints, dry bushings, misalignment, low fluid, or damaged couplers.

Symptoms:

• Clunking or clicking when turning – Often caused by worn universal joints, loose couplings, or damaged bearings inside the column.
• Steering wheel doesn’t self-center – After a turn, the wheel should return smoothly; failure suggests internal misalignment or binding components.
• Loose or wobbly steering feel – Excessive play in the wheel may indicate worn bushings, faulty tilt mechanisms, or degraded shaft connections.
• High-pitched squeaks or grinding – Dry bearings or lack of lubrication can produce persistent noise during steering input.
• Vibration or resistance while turning – Misaligned shafts or damaged intermediate couplers can cause feedback or stiffness in the wheel.

Parts to Replace

• OEM Steering Shaft Universal Joint - Upper Part # 32306871958 The Genuine BMW Steering Shaft Universal Joint part number 32306871958 is an essential component for any BMW owner looking for smooth and reliable steering.

Brands

• Genuine BMW
• Bison Performance

Why it happens:

Steering wheel failure occurs from worn bearings, loose couplings, power steering faults, misalignment, fluid leaks, or electrical malfunctions.

Symptoms:

• Stiff or hard-to-turn steering wheel – Increased effort while turning often points to power steering pump failure or low fluid levels.
• Loose or overly responsive steering – Excessive play or vague feedback can result from worn tie rods, bushings, or a failing steering rack.
• Unusual noises while turning – Squealing, whining, or clunking sounds may stem from dry bearings, worn couplers, or pump issues.
• Steering wheel vibration during cornering – Often caused by low-pressure fluid, misaligned suspension, or deteriorated steering components.
• Fluid leaks or burning smell – Leaking power steering fluid or overheating gearbox can produce odors and puddles beneath the vehicle.

Parts to Replace

• OEM BMW Steering Wheel 32308008179 The Genuine BMW Steering Wheel part number 32308008179 / 32 30 8 008 179 is a must-have for any BMW owner looking to enhance their driving experience.
• OEM Steering Wheel Wiring Harness Part # 61128038912 steering wheel wiring harness fits BMW X3–X7, supports heated wheel, paddle shifters, and driving assist features. OEM quality.
• OEM Steering Wheel Wiring Harness Part # 32306884008 steering wheel wiring harness fits BMW X5/X6/X7 (2018–2024), supports heated wheel and driving assist pro. OEM-grade quality.

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• Genuine BMW
  

Why it happens:

Intake manifold failure occurs due to heat stress, gasket leaks, vacuum loss, material fatigue, carbon buildup, impact damage, or corrosion.

Symptoms:

• Rough idle or engine misfires, caused by vacuum leaks or disrupted air-fuel mixture entering the combustion chamber.
• Engine overheating, often due to internal coolant leaks from cracked manifold passages or failed gaskets.
• Visible coolant leaks under the vehicle, especially near the intake manifold area, indicating seal or gasket failure.
• Check Engine Light activation, triggered by fault codes like P2004, P2006, or P2017 related to intake runner control issues.
• Loss of engine power or poor acceleration, resulting from uneven air distribution or stuck intake flaps affecting combustion efficiency.

Parts to Replace

• OEM BMW Engine Intake Manifold 11618603913 The Genuine BMW Engine Intake Manifold part number 11618647977 is a must-have for any BMW owner who values the performance and longevity of their car engine.

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• Genuine BMW

Fault Codes

P0012 and P0015 indicate camshaft timing faults—intake and exhaust timing over-retarded on Bank 1, affecting VVT performance.

Why it happens:

VANOS solenoid failure occurs due to oil contamination, clogged screens, worn seals, electrical faults, poor maintenance, or degraded O-rings.

Symptoms:

• Check Engine Light illuminates, often triggered by fault codes like P0012 or P0015 due to timing over-retardation on Bank 1.
• Sluggish acceleration or hesitation, especially at low RPMs, caused by improper camshaft timing and reduced valve responsiveness.
• Loss of low-end torque and power, as the VANOS system fails to optimize valve timing for performance and efficiency.
• Rough idle or engine hiccups, resulting from poor valve timing control and inconsistent combustion cycles.
• Limp mode activation or cold start issues, where the ECU limits engine output due to solenoid malfunction or oil contamination.

Parts to Replace

• OEM BMW Vanos Actuator 11367614288 This Genuine BMW Engine Variable Valve Timing (VVT) Adjuster part number 11367614288 / 11 36 7 614 288 is a must-have for any BMW owner who wants to keep their car running smoothly.
• Febi-Bilstein 175260 - Engine Variable Valve Timing (VVT) Solenoid is an electro-hydraulic crankcase-mounted unit operating at 12V, designed for precise oil pressure regulation.
• Febi-Bilstein 184790 - Engine Variable Valve Timing (VVT) Sprocket (Intake).
• Febi-Bilstein 185203 - Engine Variable Valve Timing (VVT) Sprocket (Exhaust).
• Genuine BMW 11318631848 - Engine Timing Chain Tensioner.

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• Febi-Bilstein
• Genuine BMW

P0299, P0234, and 30FF indicate turbocharger faults—underboost, overboost, and low charge-air pressure due to leaks or actuator failure.

Why it happens:

Turbocharger wastegate actuator failure occurs due to carbon buildup, weak springs, electrical faults, misadjustment, corrosion, heat stress, or contamination. 

Symptoms:

• Check Engine Light turns on, often due to fault codes like P0234 or P0299 indicating overboost or underboost conditions.
• Turbo lag or sluggish acceleration, caused by improper wastegate operation delaying boost pressure buildup.
• Reduced fuel economy, as the engine burns excess fuel trying to compensate for poor boost control.
• Unusual noises like rattling or whistling, especially at idle or light throttle, from a loose or stuck actuator mechanism.
• Erratic or insufficient boost pressure, seen on boost gauges or felt during driving, due to actuator misadjustment or diaphragm failure.

Parts to Replace

• OEM BMW Turbocharger Wastegate Actuator 11657934389 The Genuine BMW Turbocharger Wastegate Actuator part number 11657934389 is the perfect replacement part for your BMW car.

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• Genuine BMW

P0101, P0102, and 2AF2 signal air and exhaust sensor faults—MAF underperforming or reading low, plus missing NOx sensor signal.

Why it happens:

Mass air flow sensor failure occurs due to dirt buildup, damaged wiring, heat stress, poor filtration, or sensor element degradation. 

Symptoms:

• Rough idling occurs when the MAF sensor misreads airflow, causing unstable fuel delivery at low RPMs.
• Poor acceleration results from incorrect air-fuel ratios, making the engine hesitate or lag when you press the throttle.
• Check engine light may illuminate due to the ECM detecting abnormal MAF sensor signals or airflow inconsistencies.
• Increased fuel consumption happens when the sensor causes the engine to run rich, burning more fuel than necessary.
• Black smoke from the exhaust indicates excessive fuel in the combustion chamber, often triggered by faulty MAF readings.

Parts to Replace

• OEM BMW Mass Air Flow Sensor 13628605565 BMW 13628605565 is a genuine hot-film MAF sensor ensuring precise airflow measurement, optimal fuel delivery, and OE-grade performance.

Brands

• Genuine BMW

Why it happens:

HPFP failure occurs due to poor lubrication, fuel contamination, cam wear, solenoid faults, overheating, skipped maintenance, or internal damage.

Symptoms:

• Hard starting or extended cranking, especially after the vehicle sits, due to insufficient fuel pressure reaching the injectors.
• Loss of power under load or acceleration, as the pump fails to deliver adequate fuel volume at high demand.
• Check Engine Light activation, often accompanied by fault codes like P0087 or 2AAE indicating fuel pressure irregularities.
• Unusual whining or ticking noises from the pump area, caused by internal wear or cavitation.
• Engine stalling or hesitation, particularly during warm conditions or low fuel levels, when pump stress increases.

Parts to Replace

• Bosch BMW Mini Direct Injection High Pressure Fuel Pump -66848 Bosch 66848 HPFP fits BMW/Mini B46/B48/B58 engines; OEM-grade, HDP6 design, ensures precise fuel delivery and performance reliability.
• Bosch 0261500437 - Fuel Injector.

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• Bosch

Symptoms:

• Engine sputtering at high speeds: The pump can't keep up with fuel demands, causing the engine to misfire or hesitate during highway driving.
• Loss of power under load: When climbing or accelerating, fuel supply drops, making the engine feel weak or unresponsive.
• Whining noise from fuel tank: A loud humming or whining from the tank often means the pump motor is wearing out.
• Surging during acceleration: Inconsistent fuel pressure causes erratic bursts of power when you press the throttle.
• Hard starting or no start: If the pump fails to prime, fuel doesn’t reach the engine, leaving you cranking without ignition.

Parts to Replace

• OEM Fuel Pump and Strainer Set Part # 16119468618 The Genuine BMW Electric Fuel Pump part number 16119468618 is an essential component for any BMW vehicle that requires optimal fuel delivery.
• Delphi Fuel Pump Module Assembly Part # FG2711 The Delphi FG2711 Fuel Pump Module Assembly is a vehicle-specific, in-tank electric fuel pump designed to meet OE standards for performance and durability.

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• Genuine BMW
• Delphi

Fault Codes

B10AB, 801189, and 9308F1 indicate keyless entry sync error, HVAC flap misalignment, and interface fault in control module.

Why it happens:

Blower motor failure occurs due to overheating, worn bearings, clogged filters, electrical faults, poor lubrication, or age-related mechanical wear.

Symptoms:

• No airflow from vents means the motor isn’t spinning at all, often due to seized bearings or electrical failure.
• Weak airflow suggests the motor is underpowered or obstructed, possibly from worn brushes or clogged filters.
• Unusual noises like grinding, squealing, or rattling point to internal wear, debris, or failing motor components.
• Burning smell from vents indicates overheating, often caused by electrical shorts or excessive strain on the motor.
• Blower only works on high speed typically signals a failed resistor or control module affecting speed regulation.

Parts to Replace

• OEM BMW HVAC Blower Motor 64119490192 The Genuine BMW HVAC Blower Motor part number 64119490192 is a high-quality replacement part designed specifically for BMW vehicles.

• Genuine BMW

Fault Codes:

BMW fault codes 420501 and 420701 indicate transmission software errors; P17E1 flags clutch A ratio monitoring fault in TCM.

Symptoms:

• Visible fluid puddles under the vehicle often indicate a leaking pan or gasket, especially after the car has been parked.
• Low transmission fluid levels on the dipstick suggest ongoing leakage from the pan, risking internal damage.
• Burnt chemical smell from underneath the car may result from fluid dripping onto hot components due to a compromised pan seal.
• Erratic or harsh shifting can occur when fluid loss affects hydraulic pressure and transmission performance.
• Slipping gears or delayed engagement often point to insufficient fluid caused by a pan leak or cracked housing.

Parts to Replace

• BMW Auto Trans Oil Pan (w/ Filter) 24118612901 BMW 24118612901 is a genuine ZF 8-speed oil pan kit with integrated filter, gasket, bolts—fits GA8HP automatic transmissions.
• BMW Transmission Oil Pan 24117624192 The OEM Transmission Filter, part number 24117624192 / 24 11 7 624 192, is a reliable and durable replacement part for your BMW.

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• Genuine BMW
• OEM

Symptoms:

• Loose or wobbly feel when shifting gears suggests internal wear or degraded mounting points inside the knob assembly.
• Faded markings or peeling finish make gear positions hard to read, especially in low light or for unfamiliar drivers.
• Sticky or rough surface texture from accumulated grime, UV damage, or deteriorated materials can affect grip and comfort.
• Unusual play or misalignment during gear selection may indicate worn bushings or a compromised shift lever connection.
• Rattling or clicking sounds when driving over bumps often point to loosened internal components or cracked knob housing.

Parts to Replace

• OEM BMW Automatic Transmission Shift Lever Knob Part # 61319475056 This Genuine BMW Automatic Transmission Shift Lever Knob part number 61319475056 is an essential replacement part for your BMW.

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• Genuine BMW

Fault Codes:

BMW fault codes 520188 and 52008A indicate transmission software errors; P17D8 flags clutch temperature-induced torque limitation from TCM.

Symptoms:

• Visible fluid leaks under the vehicle—often reddish or brown—signal seal deterioration and loss of gear oil or transmission fluid.
• Whining or grinding noises from the drivetrain, especially in 4WD mode, suggest internal friction due to low lubrication.
• Difficulty shifting into or out of 4WD can result from reduced fluid pressure caused by seal failure.
• Unexpected disengagement of 4WD during driving may occur if fluid loss affects transfer case operation.
• Vibrations or harsh gear changes point to compromised internal components from prolonged fluid leakage and seal wear.

Parts to Replace

• OEM Transfer Case Input Shaft Seal Part # 27108642594 BMW 27108642594 is a genuine transfer case input shaft seal ensuring leak-free performance, precise fitment, and long-lasting drivetrain protection.
• OEM Transfer Case Output Shaft Seal Part # 27108642593 BMW 27108642593 is a genuine rear transfer case output shaft seal ensuring leak-free fitment, durability, and drivetrain fluid retention.

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• Genuine BMW

Fault Codes:

20E120 signals crankcase ventilation hose disconnection; P0480 indicates cooling fan control fault; 20E117 shows SCR catalyst efficiency issue. 

Why it happens:

Exhaust control valve actuator failure occurs from carbon buildup, electrical faults, gear wear, moisture intrusion, poor lubrication, or misalignment.

Symptoms:

• Unusual noises from the exhaust system – Grinding, clicking, or buzzing sounds may indicate internal gear wear or misalignment within the actuator.
• Check Engine Light illumination – Faulty actuator signals or position errors often trigger warning lights and diagnostic trouble codes like P0475.
• Reduced engine performance – Loss of power, sluggish acceleration, or poor fuel efficiency can result from improper exhaust flow regulation.
• Excessive smoke or soot from tailpipe – A stuck or malfunctioning valve disrupts combustion, especially in diesel engines, leading to black smoke.
• Actuator unresponsive to control inputs – If the valve doesn’t open or close as commanded, it may be due to electrical faults or mechanical failure.

Parts to Replace

• OEM BMW Exhaust Back Pressure Regulator 18308686640 The Genuine BMW Exhaust Back Pressure Regulator part number 18308686640 is an essential component that plays a vital role in regulating the backpressure in your BMW’s exhaust system.

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• Genuine BMW

Fault Codes:

P2127 shows low APP sensor voltage; P2138 indicates pedal sensor correlation error; 2B15 flags intake manifold pressure sensor plausibility fault.

Why it happens:

Accelerator pedal sensor failure occurs from contamination, wiring damage, connector corrosion, sensor wear, voltage issues, or ECU miscommunication.

Symptoms:

• Delayed or sluggish acceleration – Pressing the pedal results in hesitation or slow response, often due to poor signal transmission to the ECU.
• Check Engine Light illumination – Faulty sensor readings can trigger diagnostic trouble codes like P2127 or P2138, prompting a warning light.
• Reduced engine power or limp mode – The ECU may limit performance to protect the drivetrain when it detects inconsistent pedal input.
• Jerky or uneven throttle response – Inconsistent voltage signals from the sensor can cause erratic acceleration or throttle surges.
• Rough idle or stalling – A failing sensor may disrupt fuel-air mixture control, leading to unstable idle or engine shutdown.

Parts to Replace

• BMW Accelerator Pedal Assembly 35426853175 The Genuine BMW Accelerator Pedal Sensor part number 35426853175 / 35 42 6 853 175 is an essential component in your BMW’s throttle system.
• BMW Accelerator Pedal Assembly 35426853175 The Genuine BMW Accelerator Pedal Sensor part number 35426853175 / 35 42 6 853 175 is an essential component in your BMW’s throttle system.
• Hella BMW Pedal Assembly - 010946231 The Hella Accelerator Pedal Sensor part number 010946231 is a reliable replacement for your BMW vehicle.

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• Genuine BMW
• Hella
  

Fault Codes:

A6CF flags AUC sensor fault; B1640 signals mirror or turn lamp circuit issue; B1642 shows side airbag sensor communication loss. 

Why it happens:

Door lock actuator motor failure occurs from worn gears, electrical faults, moisture intrusion, corrosion, overheating, or connector damage.

Symptoms:

• Clicking, buzzing, or grinding noises – Strange sounds during locking/unlocking often signal worn gears, motor strain, or internal damage.
• Power locks work intermittently or not at all – If one door fails to respond while others function normally, the actuator may be failing.
• Lock engages but won’t release (or vice versa) – A stuck actuator can trap the door in a locked or unlocked state, affecting access and security.
• Door ajar warning light stays on – Faulty actuator sensors may falsely indicate the door is open, even when fully shut.
• Sluggish or delayed lock response – Slow engagement after pressing the lock/unlock button suggests motor fatigue or electrical resistance.

Parts to Replace

• Front Driver Side Part # 51217477699 The Genuine BMW Door Lock Actuator Motor, part number 51217477699, is a reliable and high-quality component designed to ensure the security of your BMW.
• Rear Passenger Side Part # 51227477706 The Genuine BMW Door Latch Assembly part number 51227477706 is a high-quality replacement part that is designed to offer excellent performance and durability.

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• Genuine BMW