Nissan Pathfinder R51 Factory Service Manual

This manual provides step-by-step instructions for repair, maintenance and diagnostics of the Nissan Pathfinder R51 2005-2014. Includes detailed diagrams and illustrations for repairing engines, transmissions, suspension systems, brakes and electrical equipment. Procedures for replacing consumables, diagnosing error codes, recommendations for preventive maintenance and tips for eliminating common faults are described. The manual is intended for car owners and car repair shops, helping to maintain the Pathfinder R51 in excellent technical condition and ensure safe operation.

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Engine:  VQ40DE, VK56DE, V9X, YD25DDTi

• 1. Transmission Problems

Transmission Oil Cooler: A common problem is coolant leaking into the transmission fluid due to corrosion of the cooler in the radiator. This can cause transmission damage and require a major rebuild.

Solution: Install a separate transmission oil cooler to prevent mixing with the coolant.

• 2. Rust and Corrosion

Frames and Underbody: Poor rustproofing will cause rust to appear quickly, especially in areas with harsh winters and road salt.

Solution: Regular rustproofing, especially in vulnerable areas such as the underbody and frame.

• 3. Engine Problems

V6 (VQ40DE) and V8 (VK56DE): Engines are prone to oil leaks through the valve cover gaskets and crankshaft seals.

Solution: Regular inspections and replacement of gaskets at the first sign of leaks.

• 4. Fuel System Problems

Fuel Pump Problems: Causes problems starting the engine and unstable idling.

Solution: Regularly check and replace the fuel pump and filters.

• 5. Electrical Problems

Wiring Problems: Often there are problems with the door and tailgate wiring due to wear and tear of the insulation.

Solution: Periodically check and replace damaged sections of the wiring.

• 6. Suspension and Steering

Worn Shock Absorbers and Springs: Rapid wear, especially with intensive off-road use or with heavy loads.

Solution: Regularly check the condition of the suspension and replace the shock absorbers as needed.

• 7. Cooling System Problems

Thermostat and Radiator: Thermostat failures and radiator leaks can lead to engine overheating.

Solution: Regularly check the cooling system, timely replace the thermostat and flush the radiator.

• 8. Brake Problems

Worn Brake Discs and Pads: The brakes on the Pathfinder R51 often require replacement, especially if the vehicle is used for towing or frequent braking.

Solution: Regularly check and replace the brake discs and pads.

• 9. Climate Control System Problems

Air Conditioning and Heater Problems: Malfunctions often caused by faulty throttle motors or refrigerant leaks.

Solution: Diagnose and replace faulty climate control system components.

• 10. Drive System Problems

Transfer Case Seals: Prone to wear and oil leaks, which can lead to damage to transfer case components.

Solution: Regularly check the oil level and replace the seals at the first sign of leaks.