This comprehensive Infiniti FX35/FX45 Service Repair Manual covers model years 2003 through 2008, providing detailed instructions and technical specifications for every aspect of your vehicle. Whether you are a seasoned mechanic or a DIY enthusiast, this manual equips you with the knowledge and guidance to perform repairs, maintenance, and restorations with confidence. Benefit from detailed illustrations, diagrams, wiring schematics, and step-by-step instructions that make even the most complex procedures easy to understand.

Prepare to delve into the intricacies of your Infiniti FX35/FX45, gaining access to essential information on:

* **General Information:** Get a comprehensive overview of your vehicle, including its design, features, and operating principles.
* **Engine Mechanical:** Dive deep into the heart of your car with detailed explanations of engine components, assembly, and operation.
* **Engine Lubrication System:** Understand the intricacies of your engine's lubrication system, from oil pumps and filters to lubrication schedules.
* **Engine Cooling System:** Master the workings of your cooling system, including the radiator, thermostat, and cooling fans, to ensure optimal engine temperature management.
* **Engine Control System:** Explore the sophisticated electronic systems that regulate your engine's performance, from fuel injection to ignition timing.
* **Fuel System:** Gain insights into the fuel delivery system, including fuel pumps, injectors, and fuel lines, to ensure efficient fuel combustion.
* **Exhaust System:** Learn about the exhaust components, including the catalytic converter, muffler, and tailpipe, and their role in emission control.
* **Accelerator Control System:** Understand the components and operation of the accelerator system, including the throttle body and throttle position sensor.
* **Automatic Transmission:** Explore the intricacies of your automatic transmission, including gear selection, fluid levels, and troubleshooting.
* **Transfer:** Learn about the transfer case, which allows power to be distributed between the front and rear axles.
* **Propeller Shaft:** Understand the propeller shaft, which transmits power from the transmission to the rear axle.
* **Front Final Drive:** Explore the front final drive, which reduces engine speed and increases torque for the front wheels.
* **Rear Final Drive:** Learn about the rear final drive, which performs the same function as the front final drive for the rear wheels.
* **Front Axle:** Gain insights into the front axle assembly, including the axle shafts, bearings, and differential.
* **Rear Axle:** Understand the rear axle assembly, similar in function to the front axle.
* **Front Suspension:** Explore the components and operation of your front suspension system, including struts, springs, and control arms.
* **Rear Suspension:** Learn about the rear suspension system, including its components and how it contributes to vehicle stability and ride comfort.
* **Road Wheels & Tires:** Gain insights into proper tire selection, maintenance, and repair.
* **Brake System:** Master the braking system, including the calipers, rotors, pads, and brake lines.
* **Parking Brake System:** Understand the operation and maintenance of the parking brake system.
* **Brake Control System:** Explore the electronic systems that enhance braking performance, such as ABS and electronic brake force distribution.
* **Power Steering System:** Learn about the power steering system, including the pump, rack and pinion, and steering wheel.
* **Seat Belts:** Understand the importance of seat belts and their proper operation.
* **Supplemental Restraint System (SRS):** Gain insights into the airbags and other supplemental restraint systems designed to protect you in a crash.
* **Body, Lock & Security System:** Explore the intricate workings of your car's body, locks, and security features.
* **Glasses, Window System & Mirrors:** Learn about the different window types, their operation, and maintenance.
* **Roof:** Understand the construction and operation of your vehicle's roof.
* **Exterior & Interior:** Gain insights into the exterior and interior features of your Infiniti FX35/FX45.
* **Instrument Panel Seat:** Explore the instrumentation and seating systems in your vehicle.
* **Automatic Air Conditioner:** Learn about the components and operation of your car's air conditioning system.
* **Starting & Charging System:** Understand the battery, starter motor, and charging system.
* **Lighting System:** Explore the headlamps, taillamps, and other lighting systems.
* **Driver Information System:** Gain insights into the driver information display and its functions.
* **Wiper, Washer & Horn:** Learn about the operation and maintenance of the windshield wipers, washer system, and horn.
* **Body Control System:** Explore the electronic systems that control various body functions.
* **LAN System:** Understand the local area network (LAN) that connects various electronic systems in your car.
* **Audio Visual, Navigation & Telephone System:** Explore the multimedia, navigation, and communication systems available in your Infiniti FX35/FX45.
* **Auto Cruise Control System:** Learn about the cruise control system and its operation.
* **Power Supply, Ground & Circuit Elements:** Gain an understanding of the electrical system, including power sources, grounds, and circuits.
* **Maintenance:** Find comprehensive information on regular maintenance schedules, recommended fluids, and procedures.

This manual serves as an invaluable resource for anyone seeking to perform repairs, maintenance, or restorations on their Infiniti FX35/FX45, providing the knowledge and confidence to keep your vehicle running smoothly for years to come.

The Infiniti FX35 and FX45, part of the S50 model series, were luxury crossover SUVs manufactured by Nissan's luxury division, Infiniti, from 2003 to 2008. These vehicles were the first generation of the FX line, and they quickly gained popularity for their bold styling, powerful engines, and luxurious interior. The FX35 was powered by a 3.5-liter V6 engine, while the FX45 boasted a 4.5-liter V8 engine. Both engines were paired with a 5-speed automatic transmission and offered either rear-wheel drive or all-wheel drive. The FX series was a groundbreaking vehicle for Infiniti, departing from the traditional sedan and coupe offerings and pushing the boundaries of the luxury SUV market. It was lauded for its sporty handling, thanks in part to its advanced independent suspension system and relatively low center of gravity, which was achieved by utilizing a unibody construction rather than a body-on-frame design. This combination of luxury, performance, and practicality made the FX a strong competitor to other premium SUVs like the BMW X5 and the Mercedes-Benz ML-Class.

Inside, the FX35/FX45 offered a sophisticated and comfortable cabin with premium materials, leather upholstery, and standard features like dual-zone climate control, power seats, and a Bose audio system. The vehicles were also equipped with a plethora of safety features, including standard anti-lock brakes, electronic stability control, and multiple airbags. However, the FX series wasn't without its drawbacks. Some users reported issues with reliability, particularly regarding the transmission and suspension components. Additionally, the low roofline and sloping rear window could make rear visibility challenging for some drivers, while the spacious interior came at the expense of cargo space. Despite these minor shortcomings, the first-generation Infiniti FX35 and FX45 remain a popular and desirable vehicle. Their unique design, powerful engines, and comfortable driving experience continue to attract buyers today, and the many available aftermarket parts and modifications provide ample opportunity for personalization and performance enhancements.