Era Classification:
Classic European Sports Sedan/Wagon/Convertible
Competitors Era:
Mercedes-Benz W201 (190E), Audi 80/90, Alfa Romeo 75, Volvo 240 Series
Engineering Philosophy:
Driver-focused, balanced handling, reliable inline-four and inline-six engines
Design Appeal:
Iconic BMW ' Neue Klasse' design language, sporty yet practical variants
Benefit:
Essential resource for preserving, restoring, and maintaining the E30's legendary performance and longevity.
Engine:
Complete engine overhaul, tuning, fuel injection, ignition, cooling system, lubrication
Transmission:
Manual and automatic transmission repair, clutch system, driveline components
Brakes:
Brake system repair, ABS diagnostics, fluid replacement, pad and rotor replacement
Suspension:
Front and rear suspension overhaul, shock absorbers, springs, bushings, steering components
Electrical:
Wiring diagrams, component testing, starter, alternator, battery, lighting, instruments, fuses, relays
Bodywork:
Body panel alignment, rust repair, convertible top mechanisms, interior trim removal and installation
HVAC:
Heating, ventilation, and air conditioning system diagnosis and repair
Routine Maintenance:
Oil changes, filter replacements, tune-ups, fluid checks, spark plug replacement
Troubleshooting:
Diagnostic procedures for common and uncommon faults, fault codes (if applicable to the era)
Major Repairs:
Engine rebuilds, transmission overhauls, differential repair, suspension component replacement
Special Tools:
Identification and usage of specialized BMW tools required for certain procedures
Depth:
In-depth, suitable for both DIY enthusiasts and professional mechanics
Engine Families:
M10 (4-cylinder), M20 (6-cylinder), M40 (4-cylinder - later models)
M10 Variants:
1.6L (e.g., 316i), 1.8L (e.g., 318i, 318is)
M20 Variants:
2.0L (e.g., 320i), 2.3L (e.g., 323i), 2.5L (e.g., 325i, 325is)
325I Power:
Approx. 170-171 hp (DIN) at 5,800 rpm
325I Torque:
Approx. 211 Nm (156 lb-ft) at 4,000 rpm
Injection Type:
Bosch L-Jetronic, Motronic (depending on model and year)
Octane Rating:
Premium Unleaded (91-98 RON equivalent)
Coolant Type:
Glysantin G48 (or equivalent blue ethylene glycol-based coolant), typically 50/50 mix with distilled water
Type Early:
4-speed Manual (common on lower trims)
Type Later Standard:
5-speed Getrag Manual (e.g., 260) became more common
Automatic Transmission:
ZF 4HP22 (4-speed automatic)
Limited Slip Differential:
Optional on many models, particularly 325i/is, available in various ratios (e.g., 3.73, 4.10).
Manual Transmission Fluid:
BMW ATF Dexron II (or equivalent) for earlier manuals, later manuals may specify a gear oil like Castrol TAF-X or SAE 75W-90 GL-4/GL-5.
Automatic Transmission Fluid:
BMW ATF Dexron II (or equivalent)
Wheelbase:
Approx. 2570 mm (101.2 in)
Length Touring:
Approx. 4340 mm (170.9 in)
Length Convertible:
Approx. 4340 mm (170.9 in)
Curb Weight Range:
Approx. 1200-1400 kg (2646-3086 lbs), varying by model and equipment
Era Safety Standards:
Designed to meet standards of its era; Euro NCAP not applicable. Focus on passive safety.
ABS:
Optional on most models, standard on later performance variants (e.g., 325i).
Seat Belts:
Three-point inertia-reel seatbelts standard, often with pre-tensioners on later models.
Body Structure:
Reinforced chassis and A-pillars for rollover protection, particularly on convertible models.
Oil Change:
Typically every 10,000-15,000 km (6,000-9,000 miles) or annually, depending on driving conditions and oil type.
Timing Belt:
M10 and M20 engines use timing chains, requiring less frequent service than belts. M40 engines (later models) use a belt requiring replacement around 60,000-80,000 km (36,000-50,000 miles).
Spark Plugs:
Check every 30,000-40,000 km (18,000-25,000 miles), replace as needed. Recommend high-quality copper or platinum plugs.
Engine Oil:
API SG/SH or ACEA A2/A3 rated oil, viscosity typically 5W-30, 5W-40, or 10W-40 depending on climate. Check manual for specific M-engine recommendations.
Brake Fluid:
DOT 3 or DOT 4 low-viscosity brake fluid.
Power Steering Fluid:
ATF Dexron II (or equivalent) for most models.
Rust:
Common areas include wheel arches, rocker panels, battery tray, and rear valence. Essential to check thoroughly.
Cooling System:
Radiator leaks, thermostat failures, and water pump issues are not uncommon due to age.
Electrical Gremlins:
Degraded wiring insulation, faulty grounds, and failing control modules can cause intermittent issues.
Suspension Wear:
Worn control arm bushings, ball joints, and tie rod ends are common, affecting handling and alignment.
Convertible Top Seals:
Wear and tear on seals can lead to water ingress. Convertible top hydraulics may require service.
Bmw Legacy:
BMW's reputation for 'The Ultimate Driving Machine,' precision engineering, and sporty sedans.
E30 Launch:
Introduced in 1982 as a successor to the E21, revolutionizing the 3 Series with a more modern chassis and updated styling.
Touring Introduction:
The E30 Touring (often designated E30/5) was introduced in 1987, marking BMW's first foray into the compact premium wagon segment.
Convertible Introduction:
The E30 Convertible (E30B, later E30C) was launched in 1985, building on the success of the E21 convertible, offering a stylish open-top experience.
Production Years:
1982-1994 (overall E30 platform), 1983-1991 for models covered by this manual.
Plant Locations:
Primary production at BMW's Dingolfing plant, Germany.
Automotive Journal Accolades:
Consistently praised by automotive publications of its era for handling, performance, and build quality. Often cited as a benchmark in its class.
Collector Car Status:
Highly regarded as a modern classic and collector car, particularly well-preserved examples and performance variants.
