Positioning:
The ultimate driver's car of its era, positioned as a high-performance, track-capable homologation special
Competitors:
Porsche 911 (993), Chevrolet Corvette (C4), Nissan 300ZX (Z32), Toyota Supra (MkIV), Mitsubishi 3000GT VR-4
Performance Focus:
Emphasizes handling, braking, and engine power delivery
Chassis Tuning:
Stiffer springs, performance dampers, thicker anti-roll bars, revised suspension geometry compared to standard E36 models
Aerodynamics:
Unique front and rear bumpers, side skirts, and spoilers for improved downforce and cooling
Interior Appointments:
Sport seats, M steering wheel, M gear knob, M door sill plates
Engine System:
Detailed diagnostics, repair, and overhaul of the S50B30/S50B32 engine (depending on market variant)
Engine Management:
DME (Digital Motor Electronics) system, sensor diagnostics, fuel injection, ignition timing
Fuel System:
Fuel pump, injectors, pressure regulator, fuel tank, lines, testing procedures
Exhaust System:
Catalytic converter, muffler, exhaust manifold, diagnostics and repair
Cooling System:
Radiator, water pump, thermostat, hoses, fan assembly, coolant specifications
Lubrication System:
Oil pump, oil pan, oil filter, oil specifications, oil change procedures
Transmission System Manual:
Getrag 5-speed manual transmission (S5D 310Z), clutch operation, fluid specifications, overhaul
Transmission System Automatic:
ZF 4-speed automatic transmission (optional, e.g., 4HP22), fluid type, operation, diagnostics
Drivetrain System:
Driveshafts, CV joints, differential, rear axle assembly, lubrication
Suspension System:
Front and rear suspension components, control arms, springs, dampers, bushings, alignment specifications
Steering System:
Power steering system, steering rack, tie rods, fluid type, troubleshooting
Brake System:
Front and rear disc brakes, ABS (Anti-lock Braking System), brake fluid specifications, bleeding procedures, rotor and pad replacement
Electrical System:
Wiring diagrams, battery, alternator, starter motor, lighting system, fuses, relays
Instrument Panel:
Gauges, warning lights, functionality, repair
HVAC System:
Heating, Ventilation, and Air Conditioning system, refrigerant types, component troubleshooting
Body Panels:
Hood, doors, fenders, bumpers, alignment, repair
Interior Trim:
Seats, dashboard, door panels, headliner, removal and installation
Body Hardware:
Door handles, locks, windows, regulators, seals
Maintenance Procedures:
Scheduled maintenance, fluid changes, filter replacements, tune-ups
Diagnostic Procedures:
Troubleshooting charts, symptom-based diagnostics, fault code interpretation
Repair Procedures:
Step-by-step instructions for component replacement and repair
Rebuilding Procedures:
Engine and transmission overhaul procedures
Adjustment Procedures:
Valve adjustments, idle speed settings, alignment adjustments
Installation Procedures:
Component installation, accessory fitting
Depth:
Comprehensive, from basic maintenance to full engine rebuilds and complex electrical diagnostics
Diagnostic Tools:
Information relevant to using factory diagnostic tools (e.g., DIS, GT1)
Oil Change Interval:
Typically every 7,500 to 10,000 miles or annually, whichever comes first (refer to specific manual for exact recommendation)
Filter Replacement Interval:
Oil filter: with every oil change; Air filter: every 15,000-30,000 miles; Fuel filter: 30,000-50,000 miles (check manual)
Spark Plug Replacement:
Refer to manual, often around 60,000 miles
Coolant Flush Interval:
Every 2-3 years or 30,000-50,000 miles
Engine Oil Type:
BMW High Performance SAE 5W-30 Synthetic (e.g., Castrol TWS/Edge Professional) or approved equivalent
Engine Oil Capacity:
6.5 Liters (6.9 US Quarts) for S50B30/S50B32
Coolant Type:
BMW Blue Antifreeze/Coolant (G48 Ethylene Glycol based) mixed with distilled water (50/50 ratio)
Brake Fluid Type:
DOT 4, Low Viscosity (LV)
Transmission Fluid Manual:
MTF LT-2 (or equivalent) - 75W-90 Synthetic Gear Oil
Transmission Fluid Automatic:
ATF Dexron III or equivalent
Differential Fluid:
SAE 75W-90 Synthetic Hypoid Gear Oil (often specific BMW fluid for LSD)
Vanos System:
Vanos (Variable Valve Timing) unit seals can degrade, leading to rough idle and power loss. Rebuild kits are available.
Subframe Mounts:
Rear subframe mounting points can crack or tear due to stress, especially on track-driven cars. Reinforcement kits exist.
Cooling System Components:
Plastic coolant expansion tanks can become brittle and crack. Water pump and thermostat housings can leak.
Head Gasket:
While generally robust, head gasket failures can occur, often due to overheating or improper maintenance.
Needle Bearing Failure:
Driveshaft center support bearing needle bearing can fail, causing vibrations.