Segment:
Compact Luxury Sports Convertible
Reputation:
Known for its engaging driving dynamics, build quality, and iconic styling
Competitors:
Porsche 944, Mercedes-Benz 190SL, Alfa Romeo Spider, Audi Cabriolet
Styling:
Classic BMW design language with signature Hofmeister kink and kidney grille
Driving Dynamics:
Rear-wheel drive, balanced chassis, responsive steering
Convertible Experience:
Engaging open-top driving with a well-engineered soft-top mechanism
Engine Mechanical:
Yes (Diagnosis, disassembly, assembly, inspection, repair, overhaul)
Engine Electrical:
Yes (Ignition, fuel injection, sensors, ECU, starting system, charging system)
Transmission Manual:
Yes (Diagnosis, removal, installation, overhaul)
Transmission Automatic:
Yes (Diagnosis, removal, installation, overhaul)
Drivetrain And Axles:
Yes (Clutch, driveshaft, differential, axles)
Suspension And Steering:
Yes (Front suspension, rear suspension, steering gear, power steering)
Brakes System:
Yes (Front brakes, rear brakes, parking brake, ABS - if equipped)
Fuel System:
Yes (Fuel tank, fuel pump, fuel injectors, fuel lines)
Cooling System:
Yes (Radiator, water pump, thermostat, coolant hoses)
Exhaust System:
Yes (Manifold, catalytic converter, mufflers, pipes)
Electrical System Components:
Yes (Battery, alternator, starter, lighting, horns, wipers)
Body And Chassis:
Yes (Body panels, doors, hood, trunk, convertible top mechanism)
Interior And Trim:
Yes (Seats, dashboard, door panels, carpeting)
HVAC System:
Yes (Heating, ventilation, air conditioning)
Convertible Top System:
Yes (Operation, maintenance, repair of the soft top mechanism)
Scheduled Maintenance:
Yes (Oil changes, filter replacements, inspections)
Troubleshooting:
Yes (Diagnostic charts, symptom-based troubleshooting)
Component Removal Installation:
Yes (Step-by-step guides for most components)
Overhaul Rebuild:
Yes (Detailed instructions for engine and transmission rebuilds)
Torque Specifications:
Yes (Critical for engine and chassis fasteners)
Wiring Diagrams:
Yes (Comprehensive electrical schematics)
Body Repair Procedures:
Yes (Including panel replacement, rust repair guidance)
Electrical Component Testing:
Yes (Testing of sensors, actuators, relays)
Depth:
Comprehensive (Covers routine maintenance to complete engine and transmission rebuilds)
Diagnostic Tools:
Information on necessary diagnostic tools and procedures
Diagnostic Codes:
Information on retrieving and interpreting diagnostic trouble codes (if applicable via OBD-I)
Engine Type:
Inline 6-cylinder, SOHC (M20 engine family)
Displacement:
2.5 Liters (2494 cc)
Bore X Stroke:
84.0 mm x 75.0 mm
Compression Ratio:
8.5:1 or 9.4:1 (depending on market/variant)
Horsepower:
171 hp @ 5800 rpm (approx.)
Torque:
167 lb-ft @ 4300 rpm (approx.)
Fuel Delivery:
Bosch L-Jetronic (later Motronic) Fuel Injection
Fuel Type:
Unleaded Gasoline (Premium Octane recommended)
Oil Type:
Refer to manual for specific BMW LL-98 or equivalent synthetic oil (e.g., 5W-30, 10W-40)
Oil Capacity:
Approx. 5.5 Liters (with filter change)
Oil Change Interval:
Every 7,500 - 10,000 miles or 12 months (refer to manual for precise interval based on driving conditions)
Spark Plug Replacement:
Every 30,000 - 60,000 miles (depending on spark plug type)
Timing Belt Replacement:
Not Applicable (M20 engine uses a timing chain)
Coolant Type:
BMW Blue Antifreeze/Coolant (G48) or equivalent ethylene glycol based coolant
Brake Fluid Type:
DOT 4 (low viscosity recommended)
Power Steering Fluid:
BMW Power Steering Fluid (P/N 83 29 0 429 576) or Pentosin CHF 11S/202
Heater Core Leaks:
Common failure point, leading to coolant smell and fogging windows.
Rust Susceptibility:
Wheel arches, rocker panels, and underbody are prone to rust, especially in humid climates.
Oil Pan Gasket Leaks:
Degradation of the oil pan gasket can lead to oil leaks.
Radiator And Hoses:
Aging plastic and rubber components can lead to leaks and overheating.
Convertible Top Mechanism:
Hydraulic hoses and seals can degrade over time, leading to leaks or slow operation.
Heritage:
BMW's long history of producing driver-focused sports sedans and coupes
E30 Generation:
The E30 platform, produced from 1982 to 1994, marked a significant evolution for the 3 Series.
Convertible Introduction:
The convertible variant debuted in 1985/1986, offering an open-top experience based on the highly successful E30 coupe.
Production Years E30 Convertible:
1985/1986 - 1993
Manufacturing Location:
Germany (primarily Dingolfing and Munich)
