Infiniti FX35, FX45 (S50) Service & Repair Manuals

Infiniti FX35, FX45 (S50) Service & Repair Manuals provide comprehensive guidance for the maintenance and repair of the Infiniti FX series vehicles produced between 2003 and 2008. This collection of manuals includes detailed information on engine specifications, electrical systems, drivetrain components, and chassis setups. Each manual features step-by-step instructions, wiring diagrams, and troubleshooting tips to help both professional mechanics and DIY enthusiasts efficiently diagnose and resolve issues. With a focus on both the FX35’s V6 and the FX45’s V8 engines, these manuals are essential resources for ensuring optimal performance and longevity of your Infiniti FX vehicle.

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VQ35DE, VK45DE Engine

• 1. Suspension and Steering:

Worn Bushings and Control Arms: The bushings of the front and rear control arms and the ball joints often fail, especially when driven hard on rough roads. This can lead to noise and poor handling.

Worn Shock Absorbers: The shock absorbers can wear out faster, causing a stiff suspension and poor ride quality.

Steering Rack Issues: Some owners have experienced power steering leaks or knocking noises in the steering rack.

• 2. Engine and Transmission:

FX35 Oil Consumption: The V6 engine (VQ35DE) has suffered from increased oil consumption in some cases, especially at high mileage. This could be due to worn piston rings or crankcase ventilation issues.

Transmission Issues: While the 5-speed automatic transmission is generally reliable, some owners have experienced surging shifts or hesitation when changing gears. These issues could be related to worn solenoids or the need for an oil change.

Vibration During Acceleration: In some cases, owners have complained of vibrations during acceleration, which could be related to worn driveshaft U-joints or CV joints.

• 3. Electrical Issues:

Failure of ABS Sensors: A common complaint was about the ABS sensors failing, which could result in the malfunction indicator lights on the dashboard and erratic operation of the system.

Parking Sensor Issues: Some owners have reported erratic operation of the parking sensors and rearview camera, especially in poor weather conditions.

Battery and Alternator: Batteries on the FX have a history of failing earlier than expected, especially in cold climates. Alternator issues have also been reported on some models, resulting in a drained battery.

• 4. Body and Interior:

Paint Quality: Some owners have complained about poor paintwork that is prone to chipping and fading in the sun.

Chrome Issues: Chrome parts such as door handles and moldings may crack or lose their shine over time.

Seat Wear: Leather seats, especially in the FX35, may wear out quickly, with cracks appearing, especially on the driver's seat side bolsters.

• 5. Exhaust Issues:

Catalytic Converters: Over time, the FX35 and FX45 have had issues with their catalytic converters, which may become clogged or fail. This affects engine performance, resulting in reduced power and error codes on the instrument cluster.

• 6. Climate Control:

Air Conditioning Issues: In some cases, the air conditioning system has experienced refrigerant leaks, which can result in reduced cooling efficiency. This may be due to a defective air conditioning core or compressor.

Heated Seats Problems: The seat heating system may have failed, especially in the front seats.