Engine Mechanical:
Detailed overhaul procedures, component identification, timing belt/chain inspection and replacement, cooling system, lubrication system.
Engine Electrical:
Ignition system, fuel injection system (DME), sensor diagnostics, starter, alternator, battery management.
Transmission Manual:
Manual gearbox overhaul, clutch service, driveshafts, differential.
Transmission Automatic:
Automatic transmission (e.g., 5HP30) overhaul, control systems, fluid service, torque converter.
Brakes:
Hydraulic system, ABS (Anti-lock Braking System) diagnostics, brake pad and rotor replacement, parking brake.
Suspension:
Front and rear suspension components, shock absorbers, springs, control arms, wheel alignment specifications.
Steering:
Power steering system, steering column, steering rack/box.
Body And Chassis:
Body panel repair, door mechanisms, convertible top operation (if applicable), chassis components, rust prevention.
Electrical System:
Wiring diagrams, lighting system, power windows, mirrors, central locking, instrument cluster, comfort electronics.
Climate Control:
HVAC system, refrigerant handling, fan controls, automatic climate control diagnostics.
Fuel System:
Fuel pump, fuel injectors, fuel filter replacement, evaporative emissions control (EVAP).
Exhaust System:
Exhaust manifold, catalytic converter, muffler replacement, emissions control components.
Routine Maintenance:
Oil and filter changes, fluid level checks, spark plug replacement, air filter replacement, brake fluid flush.
Troubleshooting:
Diagnostic procedures for common faults, fault code interpretation, component testing.
Major Repairs:
Engine rebuild, transmission overhaul, suspension component replacement, cylinder head service.
Component Replacement:
Step-by-step guides for replacing major and minor components across all systems.
Diagnostic Procedures:
Detailed instructions for using diagnostic tools, interpreting sensor data, and pinpointing system faults.
Torque Specifications:
Precise torque values for critical fasteners across all vehicle systems.
Depth Level:
Comprehensive
Diagnostic Capability:
Advanced
Wiring Diagrams Detail:
High-resolution, system-specific
Transmission Type:
5-Speed Manual (Getrag 420G or ZF S5D 320Z)
Transmission Type:
4-Speed Automatic (ZF 4HP24 or 5HP30)
Automatic Control:
Electronic transmission control with sport/economy modes
Manual Transmission Fluid:
BMW MTF LT-2 or equivalent (e.g., Pentosin MTF2)
Automatic Transmission Fluid:
ZF Lifeguardfluid 5 or equivalent
Crash Test Data:
Limited official data from era, but designed to meet then-current global safety standards.
ABS:
Standard (Bosch ABS III)
Traction Control:
Optional (ASC+T - Automatic Stability Control + Traction)
Airbags:
Driver and passenger airbags (standard from ~1993/1994 onwards)
Seatbelts:
Front and rear seatbelts with pretensioners
Construction:
Reinforced safety cell, crumple zones
Oil Change Interval:
Every 7,500-10,000 miles or annually, depending on driving conditions.
Spark Plug Replacement:
Typically around 60,000 miles for iridium or platinum plugs.
Transmission Fluid Change:
Automatic: every 30,000-60,000 miles; Manual: inspect as needed, change if fluid appears degraded.
Coolant Flush:
Every 2 years or 30,000 miles.
Engine Oil Type:
SAE 5W-30 or 10W-40 Synthetic (API SJ/CF or higher)
Coolant Type:
BMW Blue Antifreeze/Coolant or equivalent (G48 specification)
Engine Nikasil Wear:
Early M60 engines (some 1993 models) with Nikasil cylinder liners could be susceptible to wear from high-sulfur fuel. Later engines used Alusil or bore liners.
Cooling System Leaks:
Plastic coolant hoses and expansion tanks can degrade over time, leading to leaks.
Window Regulators:
Electric window regulators can fail, often due to worn plastic guides.
ABS/Asc Sensors:
Wheel speed sensors can become faulty, triggering ABS or ASC warning lights.
Vibration Issues:
Driveshaft guibo (flex disc) and center bearing wear can cause vibrations, particularly at speed.
Bmw Philosophy:
Focus on 'The Ultimate Driving Machine,' blending performance, luxury, and advanced engineering.
Design Era:
Flagship GT coupe designed in the late 1980s, featuring then-revolutionary styling like pop-up headlights.
Engine Introduction:
Initially launched with a V12 (850i), the 840Ci (V8) variant was introduced later to offer a more accessible performance model.
Production Period:
1990-1999 (for E31 chassis)
Manufacturing Plant:
Dingolfing, Germany
