Era Association:
Iconic sports sedan and convertible of the 1980s, known for its driving dynamics and build quality.
Target Audience:
BMW E30 owners seeking to perform their own maintenance and repairs, classic car enthusiasts, and professional mechanics specializing in vintage BMWs.
Competitors:
Mercedes-Benz W201 (190E), Audi 80/90, Alfa Romeo 75, Ford Sierra.
Vehicle Appeal:
Legendary handling, rear-wheel drive platform, relatively simple mechanicals (compared to modern cars), timeless design, strong aftermarket support.
Manual Value Proposition:
Empowers owners to maintain and repair their E30 effectively, saving on labor costs and preserving vehicle value and performance.
Primary Coverage:
Comprehensive service, repair, and maintenance
Estimated Pages:
Varies significantly by specific E30 variant; comprehensive manuals often exceed 1500 pages.
Type:
Factory-type Service and Repair Workshop Manual
Language:
English (typical for readily available aftermarket manuals based on factory data)
Engine Management:
Fuel injection, ignition systems, engine control unit (ECU) diagnostics and repair, emissions control.
Engine Mechanical:
Engine block, cylinder head, pistons, connecting rods, crankshaft, timing components, lubrication system, cooling system.
Transmission Drivetrain:
Manual and automatic transmission service, clutch assembly, driveshafts, differentials, axle shafts.
Suspension Steering:
Front and rear suspension components, shock absorbers, springs, control arms, steering rack, power steering system.
Brakes:
Front and rear brake systems (disc/drum), ABS (if equipped), brake lines, calipers, master cylinder, parking brake.
Electrical Systems:
Wiring diagrams, starter, alternator, battery, lighting system, fuses, relays, instrument cluster, body control modules.
Body And Chassis:
Body panel removal/installation, door mechanisms, convertible top mechanism, interior trim, chassis repair.
Heating Ventilation Air Conditioning:
HVAC system components, blower motor, evaporator, condenser, refrigerant system.
Routine Maintenance:
Oil changes, filter replacements, spark plug replacement, fluid level checks and top-offs, belt inspections and replacement.
Troubleshooting:
Diagnostic procedures for common and uncommon issues across all major systems, symptom-based troubleshooting guides.
Component Replacement:
Step-by-step instructions for replacing virtually all mechanical and electrical components.
Rebuilding Overhauls:
Detailed instructions for engine, transmission, and differential rebuilds, including torque specifications and clearances.
Bodywork Restoration:
Guidance on panel alignment, rust repair, convertible top repair and adjustment, interior refurbishment.
Depth:
Extremely high; suitable for professional technicians and serious DIY enthusiasts. Covers everything from basic maintenance to complete engine and transmission overhauls.
Engine Options:
Multiple inline-4 and inline-6 gasoline engines (M10, M20, M40, M42), and diesel engines (M21).
M20B25 Engine Details:
2.5L (2494 cc) inline-6, SOHC, Bosch L-Jetronic or Motronic fuel injection, approx. 168-171 hp.
M10B18 Engine Details:
1.8L (1766 cc) inline-4, SOHC, Bosch K-Jetronic fuel injection, approx. 100-105 hp.
M42B18 Engine Details:
1.8L (1796 cc) inline-4, DOHC, Motronic fuel injection, approx. 134-136 hp (later model, typically 1989+).
Specific Output Examples:
E30 M3 (S14 engine): 2.3L DOHC, 192-215 hp. 325iX: 2.7L inline-6, 168 hp.
Fuel Delivery Systems:
Bosch L-Jetronic, K-Jetronic, Motronic (various versions), and potentially Zenith carburetors on early models.
Fuel Type Recommendation:
Unleaded gasoline (Octane rating varies by engine, typically 91 or higher recommended).
Transmission Options:
4-speed manual (early models), 5-speed Getrag manual (common), 3-speed automatic (early), 4-speed automatic (later).
Optional Transmissions:
Limited-slip differential (LSD) was a popular option on performance models.
Clutch Type:
Single dry plate, diaphragm spring clutch.
AWD Option:
Available on the 325iX model (full-time viscous coupling AWD system).
Wheelbase Touring:
Approx. 101.2 inches (2570 mm)
Wheelbase Convertible:
Approx. 98.7 inches (2507 mm)
Overall Length Touring:
Approx. 173.5 inches (4407 mm)
Overall Length Convertible:
Approx. 169.4 inches (4303 mm)
Curb Weight Range:
Approximately 2,600 - 3,100 lbs (1180 - 1406 kg) depending on engine and body style.
Gvw Range:
Varies by model, consult specific vehicle documentation or manual for precise figures.
NHTSA Ratings:
Limited official ratings from the era; modern assessments often cite good structural integrity for its time.
Braking Features:
Optional Anti-lock Braking System (ABS) available on most models from mid-production onwards.
Restraint Systems:
Three-point seatbelts (front and rear), optional front seat airbags starting around 1987-1988 model years.
Chassis Design:
Reinforced chassis structure, particularly in convertible models for torsional rigidity.
Audio Systems:
Factory cassette radios (e.g., Bavaria C, Business CD), often with optional premium sound systems and amplifiers.
Display Technology:
Analog gauges and indicator lights; no digital displays or touchscreens.
Cruise Control:
Available as an option on many models.
ABS:
Optional Anti-lock Braking System (ABS) was available on most models from mid-production onwards.
Original Connectivity:
Limited to basic radio and speaker connections. No Bluetooth, USB, or cellular integration.
Oil Change Interval:
Typically every 5,000-7,500 miles or 12 months, depending on driving conditions and oil type used.
Timing Belt Interval:
Not applicable for most E30 engines, which utilize timing chains. M40 engines use a timing belt requiring replacement every 40,000-60,000 miles.
Spark Plug Replacement:
Every 30,000-60,000 miles depending on plug type (e.g., copper vs. platinum).
Engine Oil Type:
Varies by engine and temperature. Typically 10W-40 or 15W-50 synthetic or high-quality conventional oil. Consult manual for exact specs. BMW High-Performance SAE 20W-50 was common.
Coolant Type:
Ethylene glycol-based antifreeze, typically a 50/50 mix with distilled water. BMW Blue or Green coolant often specified.
Transmission Fluid Manual:
GL-4 gear oil, typically SAE 75W-90 or 80W-90.
Transmission Fluid Automatic:
Dexron II or equivalent. Capacity varies by transmission type (e.g., ZF 4HP22).
Brake Fluid Type:
DOT 3 or DOT 4 brake fluid.
Common Complaints:
Cooling system component failures (radiator, water pump, hoses), fuel pump failure, idle control valve issues, door handle corrosion, rear shock mount cracking, rust (especially around wheel arches, rocker panels, and battery tray).
Engine Specific Issues:
M20 engines can suffer from head gasket failure and cam wear. M10 engines are generally robust but can have oil seal leaks. M42 engines are known for timing chain guide wear.
Convertible Specific Issues:
Convertible top mechanism wear, seal degradation leading to water ingress, interior water damage.
Bmw Philosophy:
BMW's long-standing reputation for performance, engineering, and driver-centric vehicles ('The Ultimate Driving Machine').
E30 Introduction:
Launched in 1982 as the successor to the E21 3 Series, it marked a significant evolution in design and technology.
Touring Introduction:
The E30 Touring (often referred to as the E30 'Touring' or 'Estate') was introduced in 1987, significantly expanding the 3 Series lineup into the practical wagon segment.
Convertible Introduction:
The E30 Convertible was introduced in 1985, replacing the E21 convertible and becoming an immediate success, known for its refined open-top driving experience.
M3 Significance:
The homologation special E30 M3, with its distinctive flared arches and superior performance, is a highly sought-after classic.
Production Period:
1982-1991 (Saloon/Coupe), 1987-1991 (Touring), 1985-1993 (Convertible).
Manufacturing Locations:
Primarily Germany (Munich, Dingolfing), with some assembly in other locations.
Performance Accolades:
Consistently praised by automotive journalists for its sharp handling, balanced chassis, and driver engagement. The E30 M3 is a motorsport icon.
Classic Car Status:
Widely considered a modern classic, with strong resale values and a dedicated enthusiast following.
Reliability Reputation:
Generally good reliability when properly maintained, but specific components require attention due to age and design.
