Range Rover Sport 3.0 I6 MHEV Turbo Issues & Fixes (2023–Present)

Fault Codes:

C1A35 indicates brake pad wear, while C1A36 signals a faulty brake pad sensor, often causing warning lights, reduced braking efficiency, or incorrect readings.

Why it happens:

Brake pad wear happens due to friction from braking, high temperatures, aggressive driving, contaminated pads, or uneven rotor surfaces, reducing braking efficiency.

Symptoms:

• Squealing or grinding noises when braking.
• Reduced braking efficiency and longer stopping distances.
• Brake warning light or fault code C1A35.
• Soft or spongy brake pedal feel.
• Uneven or excessive brake dust on wheels.
• Visible thinning of brake pads below recommended thickness.

Parts to Replace

• Front (Ceramic) (QuietCast) Part # BC2461 The Bosch QuietCast BC2461 is a premium ceramic front disc brake pad set, designed for smooth, quiet braking with low dust output.
• Front (Semi-Metallic) (Blue) Part # BE2463H The Bosch Blue BE2463H is a semi-metallic front disc brake pad set, designed for high-performance braking with durability and reliability.
• Front (Semi-Metallic) (QuietCast) Part # BP2463 Bosch QuietCast semi-metallic brake pads are known for durability, heat resistance, and strong braking performance.
• Front (Ceramic) (QuietCast) Part # BC2382 The Bosch QuietCast BC2382 is a premium ceramic front disc brake pad set designed for quiet operation, durability, and strong stopping power.

Brands

• Bosch

Fault Codes:

The fault codes C1A41 and U3003 together suggest that deteriorated brake fluid may be causing increased system drag, which in turn could lead to low battery voltage affecting the ABS module’s performance.

Why it happens:

Brake fluid degrades over time because it’s hygroscopic, meaning it absorbs moisture from the air, which lowers its boiling point and leads to corrosion, contamination, and reduced braking performance.

Symptoms:

• Spongy or soft brake pedal - feels like stepping on a marshmallow instead of a firm pedal
• Delayed brake response - takes longer than usual to slow down or stop
• Brake pedal sinks to the floor - a sign of poor pressure in the system
• ABS warning light - your car’s way of saying “something’s off”
• Discolored or murky fluid - fresh fluid is clear or light amber; dark fluid means trouble
• Unusual noises - squealing or grinding when braking
• Brake fade or overheating - especially during repeated or hard braking
• Corrosion on brake components - moisture in degraded fluid can rust internal parts

Parts to Replace

• Bosch Brake Fluid Part # ESI6-32N Bosch ESI6-32N is a next-generation brake fluid engineered for modern braking systems. It’s a direct replacement for DOT 3, DOT 4, and DOT 5.1 fluids, offering enhanced performance and compatibility.

Brands

• Bosch
• Motul

Fault Codes:

C1A13 indicates ride height sensor issues, C1A20 signals excessive air suspension pressure, and control arm faults may trigger suspension warnings later.

Why it happens:

Suspension control arm failure happens due to worn bushings, ball joint damage, corrosion, impact from potholes, or excessive stress, causing instability and misalignment.

Symptoms:

• Clunking or knocking noises when driving over bumps.
• Uneven tire wear due to misalignment.
• Steering instability or wandering while driving.
• Excessive vibration felt in the steering wheel.
• Poor handling and reduced cornering stability.
• Visible damage or wear on control arm bushings or ball joints.

Parts to Replace

• Front Left Upper Part # 44517 01 The Lemförder 44517 01 is a front left upper suspension control arm designed for Land Rover vehicles, ensuring precise handling and durability.
• Front Right Upper Part # 44518 01 The Lemförder 44518 01 is a front right upper suspension control arm designed for Land Rover vehicles, ensuring precise handling and durability.
• Rear Left Lower Forward Part # 44255 01 The Lemförder 44255 01 is a rear left lower forward suspension control arm designed for Land Rover Range Rover (L460) models, ensuring durability and precise handling.
• Rear Right Lower Forward Part # 44256 01 The Lemförder 44256 01 is a rear right lower forward suspension control arm designed for Land Rover Range Rover (L460) models, ensuring durability and precise handling.

Brands

• Lemforder

Fault Codes:

P0351-P0356 indicate ignition coil circuit faults, while P0300-P0306 signal cylinder misfires, often caused by bad coils, spark plugs, or fuel issues.

Why it happens:

Ignition coil failure happens due to overheating, electrical faults, worn insulation, or excessive vibration, leading to weak or inconsistent spark generation.

Symptoms:

• Engine misfires or rough idling.
• Loss of power and poor acceleration.
• Check engine light (CEL) illuminated with codes like P0351-P0356.
• Reduced fuel efficiency due to incomplete combustion.
• Difficulty starting the engine or stalling.
• Strong fuel smell from unburned fuel in the exhaust.

Parts to Replace

• Bosch Ignition Coil Part # 0986221149 The Bosch Ignition Coil (PART # 0986221149) is a high-quality replacement component designed for efficient spark generation and reliable engine performance.

Brands

• Bosch

Fault Codes:

P252F indicates oil deterioration from contamination or overfilling, while P06DD signals oil pressure control failure, often due to sensor or pump issues.

Why it happens:

Engine oil degradation failure happens due to oxidation, contamination, excessive heat, and prolonged use, leading to reduced lubrication, sludge buildup, and engine wear.

Symptoms:

• Increased engine wear due to reduced lubrication.
• Sludge buildup and dark, thick oil consistency.
• Reduced fuel efficiency and poor engine performance.
• Overheating issues from inadequate heat dissipation.
• Check engine or oil warning light activation.
• Knocking or ticking noises from engine components.

Parts to Replace

• Fuchs Engine Oil 800364111 The Fuchs Engine Oil (PART # 800364111) is a high-performance 0W-20 synthetic oil designed for modern gasoline and hybrid engines, including Land Rover and Jaguar models.
• Fuchs Engine Oil 800364128 The Fuchs Engine Oil (PART # 800364128) is a high-performance 0W-20 synthetic oil designed for modern gasoline and hybrid engines, including Land Rover and Jaguar models.

Brands

• Fuchs

Fault Codes:

Typical cooling-related or turbo-temperature faults include P2182 (Coolant Temperature Sensor Circuit), P00B7 (Engine Coolant Flow Insufficient), and sometimes P2Bxx turbo cooling performance codes when coolant flows to the turbo drops.

Why it happens:

The turbo coolant line carries hot coolant to regulate turbocharger temperature, which is especially important on the 3.0L MHEV’s high-pressure, electrically assisted turbo system. Over time, the line can crack, develop pinhole leaks, or the fittings may loosen due to repeated heat cycles, vibration, or contamination in the coolant system. Once coolant flow is disrupted, the turbo overheats, leading to reduced performance, thermal stress, and potential long-term turbo damage.

Symptoms:

• Coolant smell or visible coolant drip near turbo area
• Rising engine temperatures under load
• Reduced turbo response or limp-mode activation
• Whining or heat-related turbo noises
• Low coolant level warning
• Check Engine Light with cooling or turbo-related codes

Parts to Replace

• Rein CHT0957 - Turbocharger Coolant Line (Supply (Turbocharger To Pipe)) is engineered to efficiently transport coolant from the turbocharger to the pipe, ensuring optimal engine performance and longevity.

Brands

• Rein

Why it happens:

A multi-purpose relay handles power for several systems such as lights, HVAC, fuel pump, or accessories. Over time, its internal contacts wear out, corrode, or stick due to heat, moisture, or electrical load changes. When the relay can no longer open or close properly, the systems it controls begin to work intermittently, lose power, or fail entirely. Aging, voltage spikes, and prolonged cycling make these relays particularly vulnerable.

Symptoms:

• Intermittent operation of lights, HVAC, or accessories
• System works only sometimes or cuts out suddenly
• Clicking sound from the fuse box
• No power to a component even though the fuse is good
• Random electrical glitches or warning messages

Parts to Replace

• Hella 933766801 - Multi-Purpose Relay is engineered to meet the highest standards of quality and reliability, making it an essential component for various models.

Brands

• Hella

Fault Codes:

P0729-P0736 indicate gear ratio errors, P17BF signals hydraulic pressure faults, and fluid leaks may cause future warnings, affecting transmission performance.

Why it happens:

Transmission fluid leaks happen due to worn seals, damaged gaskets, loose drain plugs, cracked transmission housings, or degraded fluid lines, causing fluid loss.

Symptoms:

• Red or brown fluid puddles under the vehicle.
• Low transmission fluid levels requiring frequent top-ups.
• Delayed or rough gear shifts due to fluid loss.
• Burning smell from overheated transmission components.
• Transmission warning light or fault codes like P17BF.
• Slipping gears or poor acceleration affecting drivability.

Parts to Replace

• Motul 105774 - Automatic Transmission Fluid is engineered to deliver exceptional performance for a variety of European vehicles.

Brands

• Motul

Why it happens:

Windshield wiper blades typically fail due to rubber deterioration from UV exposure, dirt buildup, or extreme temperatures, which causes streaking, skipping, or total loss of contact with the windshield.

Symptoms:

• Streaking or smearing on the windshield, even after a fresh swipe
• Chattering or squeaking sounds as the blades move across the glass
• Skipping or bouncing instead of smooth, consistent motion
• Uneven contact with the windshield, leaving patches of water or debris
• Cracked, split, or frayed rubber on visual inspection
• Blades not returning to the correct resting position
• Reduced visibility during rain despite the wipers being on

Parts to Replace

• Bosch Windshield Wiper Blade Set - Front Part # 5251524-Kit The Bosch 5251524-Kit is a front windshield wiper blade set designed for OEM-quality performance and a precise fit. These are beam-style blades, offering excellent all-weather wiping with uniform pressure across the windshield.

Brands

• Bosch