This comprehensive 1990 Renault 25 Service and Repair Manual provides detailed instructions and illustrations for maintaining, servicing, diagnosing, and repairing your vehicle. It's the same information used by technicians at dealerships, ensuring you have the most accurate and up-to-date guide possible.

The manual includes step-by-step instructions, diagrams, illustrations, wiring schematics, and specifications for all models and repairs. It covers a wide range of topics, including:

* **Maintenance:** Regular maintenance schedules, fluid checks, and replacement procedures.
* **Engine:** Detailed information on engine components, operation, diagnostics, and repair.
* **Control System:** Covers the electronic control systems, including sensors, actuators, and the engine control unit.
* **Mechanical:** Information on the transmission, suspension, brakes, steering, and other mechanical systems.
* **Fuel Service Specifications:** Detailed specifications for fuel systems, including fuel injectors, fuel pumps, and fuel lines.
* **Emission Control:** Covers the emissions control systems, including catalytic converters, oxygen sensors, and exhaust systems.
* **Intake Exhaust Cooling:** Information on the cooling system, including the radiator, thermostat, and cooling fans.
* **Lube:** Lubrication specifications and procedures for various components.
* **Ignition Starting Charging:** Covers the ignition system, starter motor, and charging system.
* **Auto Transmission Clutch:** Detailed information on automatic transmissions, including clutch operation, troubleshooting, and repair.
* **Manual Transmission:** Covers manual transmissions, including gear selection, clutch operation, and repair.
* **Transfer Propeller Shaft:** Detailed information on transfer cases and propeller shafts.
* **Drive Shaft:** Information on drive shafts including diagnostics and repair.
* **Differential:** Covers differentials, including operation, diagnostics, and repair.
* **Axle Suspension:** Detailed information on axles and suspension systems, including diagnostics and repair.
* **Tire & Wheel:** Covers tires and wheels, including tire selection, mounting, and balancing.
* **Brake Control:** Information on brake control systems, including ABS and traction control.
* **Brake:** Comprehensive information on brake systems, including calipers, rotors, drums, and brake pads.
* **Parking Brake:** Covers parking brakes, including adjustment and repair.
* **Steering Column:** Detailed information on the steering column, including operation and repair.
* **Power Steering:** Covers power steering systems, including pump, hoses, and steering gear.
* **Air Condition:** Information on air conditioning systems, including operation, troubleshooting, and repair.
* **Suppl Restraint System:** Covers supplemental restraint systems, including airbags and seatbelt pretensioners.
* **Seat Belt:** Detailed information on seatbelts, including adjustment and repair.
* **Engine Immobilizer:** Covers engine immobilizer systems, including diagnostics and troubleshooting.
* **Cruise Control:** Information on cruise control systems, including operation and repair.
* **Wiper & Washer:** Covers windshield wipers and washers, including operation and repair.
* **Door Lock:** Information on door locks, including operation and repair.
* **Meter Audio/Visual:** Covers instrument panels, gauges, and audio-visual systems.
* **Horn:** Information on horns, including operation and repair.
* **Windshield/Glass Mirror:** Covers windshields, windows, and mirrors, including replacement and repair.
* **Instrument Panel:** Information on the instrument panel, including operation and repair.
* **Seat:** Covers seats, including adjustment, repair, and upholstery.
* **Engine Hood/ Door:** Information on engine hoods and doors, including operation and repair.
* **Exterior & Interior:** Covers exterior and interior components, including trim, paint, and upholstery.
* **Electrical:** Comprehensive information on the electrical system, including wiring diagrams, circuits, and components.
* **Multiplex/Can Communication:** Covers multiplex and CAN communication systems, including diagnostics and troubleshooting.

This manual is a valuable resource for anyone who wants to maintain, service, or repair their 1990 Renault 25. It's a comprehensive and detailed guide that covers all aspects of the vehicle.

The 1990 Renault 25, a mid-size executive car produced by the French automaker Renault, was a significant step forward for the company, both in terms of technology and design. Introduced in 1984, the 25 was the first Renault to feature a fully digital dashboard, a pioneering feature at the time. Its sleek, aerodynamic design, penned by famed Italian designer Marcello Gandini, was a departure from the boxy shapes prevalent in the 1980s and helped the car achieve a remarkable drag coefficient of 0.30. The 25 offered a range of powerful petrol and diesel engines, with options including a turbocharged 2.2-liter petrol engine, a sophisticated V6 engine, and a range of frugal diesel units. Inside, the 25 offered a spacious and well-appointed cabin with comfortable seating and a high level of equipment. Its innovative design and advanced technology made it a highly regarded car in its segment, competing with established rivals like the BMW 5 Series and Mercedes-Benz W124.

However, the Renault 25 faced challenges despite its merits. Production costs were high, impacting its price competitiveness, and its advanced technology proved somewhat unreliable in early models. Furthermore, the car's complex design and challenging repairs made it a demanding vehicle to maintain. This factor, coupled with its high purchase price, ultimately hindered the 25's commercial success. Despite these challenges, the Renault 25 left a lasting impression on the automotive world. Its ground-breaking features, sophisticated design, and emphasis on comfort and refinement paved the way for future generations of Renault cars. The 1990 model year saw the introduction of several updates, including revised styling, enhanced engine options, and improved interior features. The 1990 Renault 25 remains a testament to Renault's ambition during the 1980s, a period when the company sought to establish itself as a serious contender in the premium car market.