Segment:
Compact Executive Sedan/Coupe/Convertible
Reputation:
Known for sporty handling, refined engines, and premium build quality.
Competitors:
Mercedes-Benz C-Class (W202), Audi A4 (B5), Lexus ES300 (XV10), Infiniti G20 (P10)
Engine Availability:
Primarily featured the M50/M52 series inline-six engines.
Handling:
Excellent balance and responsive steering contributed to its 'Ultimate Driving Machine' reputation.
Body Styles:
Available as Sedan, Coupe, Convertible, and later a Touring (Wagon) in some markets.
Engine:
M50/M52 inline-6, including diagnosis, overhaul, cooling, lubrication, fuel, ignition, emissions
Transmission:
5-speed Manual (Getrag 250G), 4-speed Automatic (ZF 4HP22EH), diagnosis, overhaul, fluid changes
Drivetrain:
Rear-wheel drive, differential, driveshafts, CV joints, diagnosis, repair
Suspension:
Front MacPherson struts, rear multi-link, shock absorbers, springs, bushings, alignment, diagnosis, replacement
Brakes:
Front vented discs, rear solid discs, ABS (Anti-lock Braking System), brake fluid, pads, rotors, calipers, lines, diagnosis, repair
Steering:
Hydraulic power steering, steering rack, pump, hoses, diagnosis, repair
Electrical System:
Battery, alternator, starter, lighting, ignition, instrument cluster, diagnosis, wiring diagrams
HVAC:
Heating, Ventilation, and Air Conditioning system, refrigerant, compressor, blower motor, diagnosis, repair
Body And Chassis:
Body panels, doors, windows, interior trim, chassis components, rust prevention, repair
Safety Systems:
Airbags (SRS), seatbelts, crash structure
Maintenance:
Oil changes, filter replacements, fluid checks and top-offs, spark plug replacement, belt inspection and replacement
Troubleshooting:
Step-by-step diagnostic procedures for common and uncommon issues, fault code interpretation
Repair:
Detailed instructions for component removal, installation, and overhaul for all major systems
Adjustment:
Adjustment procedures for brakes, clutch, headlights, etc.
Calibration:
Calibration procedures for sensors and electronic modules where applicable
Depth:
Comprehensive, covering basic to advanced repair and diagnostics
Diagnostic Tools:
References to common diagnostic tools and procedures, including OBD-I (for earlier models) and early OBD-II functionalities.
Engine Code:
M50B25 (early) / M52B25 (later)
Configuration:
Inline 6-cylinder, DOHC, 24 valves
Displacement:
2.5 Liters (2494 cc)
Bore X Stroke:
84.0 mm x 75.0 mm
Compression Ratio:
10.0:1 (M50) / 10.2:1 (M52)
Horsepower:
189 hp @ 5900 rpm (M50) / 170 hp @ 5500 rpm (M52, depending on market/tuning)
Torque:
181 lb-ft @ 4200 rpm (M50) / 177 lb-ft @ 3900 rpm (M52)
Fuel Delivery:
Bosch Motronic electronic fuel injection (MFI)
Fuel Type:
Premium Unleaded Gasoline (91 octane or higher)
ECU:
Bosch Motronic M3.3 / M3.10
Gear Ratios:
Varies by specific model, e.g., Getrag 250G common.
Type:
4-Speed Automatic (ZF 4HP22EH)
Features:
Electronic control, Sport Mode
Clutch:
Hydraulic actuation (Manual Transmission)
Manual Transmission Fluid:
BMW recommends specific synthetic gear oil, e.g., ATF DEXTRON III for automatic, MTF LT-1/LT-2 for manual.
Head Unit:
Factory BMW radio/cassette/CD players, often with optional premium sound systems (e.g., Harman Kardon).
On Board Computer:
Optional On-Board Computer (OBC) with functions like fuel economy, range, and system checks. Often suffers from dead pixels on the display.
Cruise Control:
Standard or optional depending on trim level.
Bluetooth:
Not available from factory.
Automatic Climate Control:
Optional on higher trims, offering automatic temperature regulation.
Oil Change Interval:
Typically every 7,500-10,000 miles or annually, depending on driving conditions and oil used. The manual will detail BMW's condition-based service (CBS) or fixed interval recommendations.
Spark Plug Replacement:
Every 30,000-60,000 miles depending on spark plug type (copper vs. platinum/iridium).
Coolant Flush:
Every 2-3 years or 30,000-50,000 miles.
Engine Oil Type:
BMW Longlife-98 specification, typically 5W-30 or 5W-40 synthetic oil.
Engine Oil Capacity:
6.5 Liters (approx. 6.9 US Quarts)
Coolant Type:
BMW Blue Antifreeze/Coolant, or equivalent silicate-free, ethylene glycol-based coolant.
Brake Fluid Type:
DOT 4 or DOT 4 Plus brake fluid.
Common Problems:
Water pump failure (plastic impeller), VANOS (Variable Valve Timing) system issues, cooling system hoses and expansion tank leaks, subframe cracking (especially on earlier models), OBC (On-Board Computer) pixel degradation, door panel adhesive failure, EWS immobilizer issues.
Preventative Maintenance:
Regular inspection of cooling system components, timely replacement of plastic water pump impellers with metal ones, checking subframe mounting points.
Heritage:
BMW's legacy of performance and luxury sedans dating back decades.
E36 Introduction:
The E36 generation replaced the E30 3 Series and introduced a more modern, aerodynamic design and improved chassis dynamics.
Facelift:
Minor styling updates and mechanical revisions occurred throughout the E36's lifecycle, including M52 engine introduction.
Production Years E36:
1990-2000 (globally), 1992-1998 for US market 325i
Manufacturing Locations:
Primarily Dingolfing, Germany, with some assembly in other global locations.