Positioning:
The BMW E30 M3 is a legendary homologation special, celebrated for its racing pedigree and exceptional driving dynamics. This manual caters to owners and enthusiasts dedicated to preserving and maintaining this iconic performance vehicle.
Competitors:
Competed with high-performance coupes of its era such as the Porsche 944, Mercedes-Benz 190E 2.3-16 Cosworth, and Ford Sierra RS Cosworth. Its unique character and motorsport focus set it apart.
Manual Value Proposition:
Provides the definitive factory-level documentation required for accurate diagnosis, maintenance, and repair, ensuring the longevity and performance of the E30 M3.
Engine Systems:
Engine mechanical (S14B23), fuel injection (Bosch Motronic), ignition, cooling, lubrication, exhaust.
Transmission Systems:
Manual transmission (Getrag 265), clutch, driveline, differential.
Chassis Systems:
Suspension (front struts, rear semi-trailing arms), steering, brakes (ABS optional), wheels, tires.
Electrical Systems:
12V electrical system, battery, alternator, starter, lighting, instrumentation, fuses, relays, engine control unit (ECU) wiring.
Body And Interior:
Body panels, doors, windows, locks, seats, trim, HVAC, sound system.
Maintenance:
Scheduled maintenance, oil changes, filter replacements, fluid checks, tune-ups.
Troubleshooting:
Diagnostic procedures, fault finding for all major systems, electrical schematics interpretation.
Repair And Rebuild:
Component removal, installation, overhaul, and rebuilding procedures for engine, transmission, suspension, brakes, etc.
Technical Specifications:
Detailed torque specifications, clearances, tolerances, fluid capacities, and electrical values.
Depth:
Comprehensive, covering from basic maintenance to complex repairs and diagnostics. Suitable for professional technicians and experienced enthusiasts.
Format:
PDF (Portable Document Format)
Searchability:
Likely text-searchable due to being a factory manual PDF, allowing quick access to specific information.
Printability:
High-quality, allowing for printing of the entire manual or individual pages as needed.
Binding:
N/A (Digital Download - PDF)
Paper Type:
N/A (Digital Download - PDF)
Engine Type:
Naturally Aspirated Inline 4-Cylinder
Displacement:
2.3 Liters (2302 cc)
Horsepower:
192 hp @ 6,750 rpm (Euro Spec), 192 hp @ 6,750 rpm (US Spec with catalytic converter)
Torque:
170 lb-ft @ 4,750 rpm (Euro Spec), 170 lb-ft @ 4,750 rpm (US Spec)
Fuel Delivery:
Bosch Motronic Electronic Fuel Injection (EFI)
Fuel Type:
Premium Unleaded Gasoline (91 octane or higher recommended)
Engine Control Unit:
Bosch Motronic M1.3
Bore X Stroke:
91 mm x 87 mm
Compression Ratio:
10.5:1
Length:
4330 mm (170.5 in)
Height:
1370 mm (53.9 in)
Wheelbase:
2564 mm (100.9 in)
Curb Weight:
Approx. 1200 kg (2646 lbs)
Gross Vehicle Weight Rating:
Approx. 1650 kg (3638 lbs)
Wheel Bolt Pattern:
5 x 120 mm
Standard Wheel Size:
15 x 7 inches (early), 15 x 7.5 inches (later/optional)
Standard Tire Size:
205/50 VR 15
Crash Test Results:
Specific official ratings from major agencies like NHTSA/IIHS for the 1990 E30 M3 are not readily available for this era of vehicle. However, BMWs of this period were known for robust construction.
ABS:
Optional Anti-lock Braking System (ABS)
Traction Control:
No electronic traction control
Airbags:
No airbags standard for 1990 model year.
Seatbelts:
Three-point inertia-reel seatbelts front and rear.
Rollover Protection:
Reinforced A-pillars and body structure.
Audio System:
Factory installed Bavarian Radio (e.g., Bavaria C Reverse II), optional CD player. Basic analog systems.
Cruise Control:
Optional cruise control system.
Connectivity Features:
No modern connectivity features (Bluetooth, USB, etc.). Primarily mechanical and electrical systems.
Oil Change Interval:
Recommended every 5,000 - 7,500 miles or annually, depending on driving conditions. Check manual for specific recommendations.
Major Service Intervals:
Timing belt (if applicable, though S14 has chain), spark plugs, valve adjustments typically every 30,000 - 60,000 miles. Refer to manual for precise intervals.
Engine Oil:
SAE 15W-50 or 20W-50 synthetic recommended for optimal performance and protection, especially under hard driving. Check manual for BMW approvals.
Coolant:
BMW Blue Coolant (G48) or equivalent ethylene glycol-based coolant mixed 50/50 with distilled water.
Brake Fluid:
DOT 4 brake fluid.
Transmission Fluid:
Manual Transmission Fluid (MTF), e.g., GL-4 specification. Manual will specify BMW part number or equivalent.
Differential Fluid:
Limited-Slip Differential (LSD) fluid with friction modifier, e.g., GL-5 specification. Manual will specify BMW part number or equivalent.
Common E30 M3 Issues:
Subframe mounting points (rear), oil seal leaks (crankshaft, oil pan), coolant leaks, VANOS issues (if applicable, but S14 does not have VANOS), valve adjustments, fuel injector issues, rear shock tower fatigue.
Oil Filter Part Number:
Mann-Filter W914/2, Mahle OX12D, or OEM equivalent.
Air Filter Part Number:
Mann-Filter C33111/2 or OEM equivalent.
Bmw Motorsport Division:
The M3 lineage began with the E30 M3, developed by BMW Motorsport GmbH to homologate the car for Group A touring car racing. It quickly became a dominant force.
E30 M3 Development:
The E30 M3 featured a wider track, revised suspension geometry, distinct body panels (including box flares), and a high-revving, motorsport-derived S14 engine, differentiating it significantly from standard E30 models.
Production Years:
1986-1991
Production Volume:
Approximately 17,970 units worldwide across all E30 M3 variants.
Motorsport Success:
Won numerous championships including the World Touring Car Championship, European Touring Car Championship, Deutsche Tourenwagen Meisterschaft (DTM), and many national series.
Automotive Press Acclaim:
Consistently lauded by automotive publications for its handling, steering feedback, and motorsport DNA. Recognized as one of the greatest sports sedans/coupes of its era.
Performance Car Awards:
Frequently featured in 'greatest cars' lists and lauded for its track-bred performance.
