Positioning:
The BMW E30 is a highly regarded entry-level luxury sports sedan and coupe, celebrated for its driving dynamics and build quality, making it a popular choice for enthusiasts and a prime candidate for maintenance and restoration.
Competitors:
Competed with models like the Mercedes-Benz W201 (190E), Audi 80/90, and various Japanese sports sedans of the era.
Design Philosophy:
Focused on driver engagement, balanced chassis, and a premium feel, often referred to as the 'ultimate driving machine' in its segment.
Enthusiast Appeal:
Known for its robust engineering, relatively simple mechanicals (compared to modern cars), and strong aftermarket support, making it ideal for DIY enthusiasts.
Engine Mechanical:
Detailed overhaul, component testing, lubrication systems, cooling systems, fuel delivery, emission control systems.
Engine Electrical:
Ignition system, starting and charging systems, ECU diagnostics, sensor testing, wiring diagrams.
Transmission Manual:
Clutch system, gearbox overhaul, shift linkage adjustments, fluid specifications.
Transmission Automatic:
Automatic transmission overhaul, hydraulic control systems, torque converter, fluid change and level checks.
Drivetrain:
Driveshafts, universal joints, differential overhaul, axle shafts, wheel bearings.
Suspension:
Front and rear suspension component inspection, replacement, alignment procedures, strut and shock absorber servicing.
Steering:
Steering rack and pinion overhaul, power steering system diagnosis and repair, steering column adjustments.
Brakes:
Front and rear brake systems (disc/drum), ABS (if equipped), brake fluid replacement, bleeding procedures, caliper and master cylinder overhaul.
Electrical System:
Comprehensive wiring diagrams, lighting systems, power windows, central locking, dashboard instruments, fuse and relay identification.
Body And Chassis:
Body panel repair, rust prevention, door and window mechanisms, interior trim removal, underbody protection.
HVAC:
Heating, ventilation, and air conditioning system diagnosis, refrigerant handling, component replacement.
Routine Maintenance:
Oil and filter changes, fluid level checks and top-offs, spark plug replacement, air filter replacement, brake pad replacement.
Troubleshooting:
Diagnostic charts, symptom-based troubleshooting guides, common fault diagnosis.
Repair Overhaul:
Complete engine rebuilds, transmission overhauls, suspension component replacement, brake system repairs, electrical component replacement.
Diagnostics:
OBD-I diagnostic codes (if applicable), sensor testing procedures, electrical system diagnostics.
Adjustments:
Valve adjustments, ignition timing adjustments, idle speed adjustments, clutch and brake pedal adjustments.
Depth:
Comprehensive - suitable for professional technicians and advanced DIY mechanics.
Detail Level:
Step-by-step instructions, torque specifications, special tool requirements, diagnostic flowcharts, detailed diagrams and illustrations.
Engine Variants:
M10 (4-cylinder), M20 (6-cylinder), S14 (4-cylinder performance).
M10 Displacement:
1.8L (1766cc) - typically found in 316, 318 models.
M20 Displacement:
2.0L (1990cc), 2.3L (2316cc), 2.5L (2494cc) - typically found in 320i, 323i, 325i/is models.
S14 Displacement:
2.3L (2341cc) - found in M3 models, high-performance variant.
Horsepower Range:
Approximately 90 hp (316) to 192 hp (325i/is) and 218 hp (M3 Evolution).
Torque Range:
Approximately 100 lb-ft to 170 lb-ft.
Injection Type:
Bosch L-Jetronic (early models), Bosch LE-Jetronic (later 4-cyl), Bosch Motronic (6-cyl and M3).
Fuel Type:
Unleaded Gasoline (Octane rating varies by region and engine, typically 91 AKI or higher recommended for performance models).
Crash Test Information:
E30 models predated stringent modern crash testing standards. However, they were designed with a robust unibody construction and crumple zones for their era.
ABS:
Optional on many models, standard on some later or higher trim variants (e.g., M3).
Airbags:
Driver airbag became optional in later years of production, not standard across all models.
Seatbelts:
Three-point front seatbelts, two-point rear seatbelts (later models may have three-point rear).
Oil Change Interval:
Typically every 7,500 - 10,000 miles (12,000 - 16,000 km) or annually, depending on driving conditions and oil quality.
Timing Belt Replacement:
For M20 engines: Recommended every 40,000 - 60,000 miles (64,000 - 96,000 km). M10 engines typically used timing chains. The S14 (M3) uses a timing chain. Consult manual for exact intervals.
Engine Oil Type:
Varies by engine and climate. Common recommendations include 10W-40, 15W-40, or 20W-50 synthetic or semi-synthetic oil. Consult the manual for specific M10, M20, and S14 requirements.
Coolant Type:
Ethylene glycol-based coolant with corrosion inhibitors. BMW recommends specific coolant (e.g., BMW Antifreeze/Coolant) or a compatible equivalent. Typically a 50/50 mix with distilled water.
Brake Fluid Type:
DOT 3 or DOT 4 brake fluid.
Common Problems:
Cooling system failures (radiator, water pump, hoses), fuel distributor issues (K-Jetronic), sunroof drain blockage, headliner sagging, rust in common areas (wheel wells, rocker panels), fuel pump failure, idle control valve issues (M20).
Preventative Maintenance:
Regular inspection and replacement of cooling system components, cleaning of sunroof drains, diligent rust prevention, and consistent fluid changes are crucial for E30 longevity.
Bmw Legacy:
BMW has a long history of producing driver-focused vehicles, and the E30 is a pivotal model that solidified its reputation for performance and handling in the compact executive segment.
Production Start End:
Production spanned from 1982 (for the 1983 model year) to 1991 for sedans and convertibles. Wagons continued to 1994, and some markets saw later production runs for certain variants.
Major Updates:
Facelift in 1987 (larger bumpers, updated interior, revised engines for some models), introduction of the M3 model in 1986.
Manufacturing Locations:
Primary production in Munich, Germany. Some assembly occurred in other locations depending on market.
Sales Figures:
Over 2.3 million E30s produced worldwide across all body styles, making it a highly successful generation for BMW.
