Segment:
Compact Executive Sports Sedan/Coupe
Target Audience:
Enthusiasts, DIY mechanics, professional technicians working on E30 chassis BMWs
Key Competitors:
Mercedes-Benz 190E, Audi 80/90, Alfa Romeo 75, Ford Sierra, Opel Vectra
Vehicle Focus:
The 325es was a model optimized for fuel efficiency and smooth power delivery, often featuring a Getrag 260 5-speed manual or ZF 4HP22 automatic transmission and a mechanically efficient M20B27 engine with a lower compression ratio than performance variants.
Engine:
Yes (M20 inline-six, fuel injection, ignition, cooling, lubrication)
Transmission:
Yes (Manual and Automatic transmission overhauls, clutch, driveshafts)
Suspension:
Yes (Front struts, rear trailing arms, bushings, shocks)
Steering:
Yes (Power steering system, steering rack, linkages)
Brakes:
Yes (Front discs, rear drums/discs depending on specific model year within range, ABS system if equipped, fluid bleeding)
Electrical:
Yes (Wiring diagrams, ECU, sensors, lighting, starter, alternator, battery)
Bodywork:
Yes (Body panel removal/installation, doors, hood, trunk, glass, interior trim)
HVAC:
Yes (Heating, ventilation, air conditioning system)
Fuel System:
Yes (Fuel tank, pump, injectors, fuel pressure regulator, L-Jetronic/Motronic variants)
Maintenance:
Yes (Oil changes, filter replacements, spark plugs, coolant, belt checks)
Troubleshooting:
Yes (Diagnostic procedures for common faults, symptom-based troubleshooting)
Repair:
Yes (Component removal, disassembly, reassembly, and installation)
Diagnostics:
Yes (ECU fault codes, sensor testing, live data interpretation where applicable)
Overhaul:
Yes (Engine, transmission, differential rebuilds)
Depth:
Comprehensive (Covers everything from routine maintenance to major overhauls and diagnostics)
Engine Type:
M20B27 Inline-6
Displacement:
2.7 Liters (2693 cc)
Bore X Stroke:
84 mm x 81 mm
Compression Ratio:
8.5:1 (for 'es' models, compared to 9.0:1 or higher in other M20 variants)
Horsepower Net:
121-124 hp @ 4800-5000 rpm (approximate, varies slightly by year and market)
Torque Net:
170 lb-ft @ 3250 rpm (approximate, emphasizes low-end torque)
Fuel Delivery:
Bosch L-Jetronic or Motronic fuel injection system
Ignition System:
Electronic ignition with distributor (later models may have coil-on-plug variants)
Valvetrain:
SOHC (Single Overhead Camshaft), 2 valves per cylinder
Cooling System:
Pressurized, liquid-cooled
Oil Capacity:
Approx. 5.0 liters (with filter), consult manual for exact specification
Transmission Type Standard:
Getrag 260 5-speed manual transmission
Transmission Type Optional:
ZF 4HP22 4-speed automatic transmission
Clutch Type:
Hydraulically actuated single dry plate clutch
Differential:
Rear-wheel drive, various open differential ratios (e.g., 3.73:1 common)
Manual Transmission Fluid:
BMW ATF Dexron III (or equivalent) for manual gearbox, MTF LT-2 for later models. Check manual for specific VIN.
Automatic Transmission Fluid:
BMW ATF Dexron III (or equivalent)
Crash Test Results:
As this is a 1980s vehicle, standardized crash test ratings like those from NHTSA or Euro NCAP as we know them today were not as comprehensive or publicly available. The E30 chassis was designed with a robust safety cell for its era.
ABS:
Optional on some models, standard on later E30s depending on market. Check manual for specific system details.
Airbags:
Generally not standard, optional driver airbag available on later models within the range.
Seatbelts:
Three-point seatbelts front and rear
Body Structure:
Reinforced passenger compartment, crumple zones front and rear
Head Unit:
Original units were typically analog radios with cassette players. Aftermarket head units are common for modern audio capabilities.
Speakers:
Factory speaker locations are present, often with aftermarket upgrades available.
Cruise Control:
Optional on many models, controlled via a stalk on the steering column.
ABS:
As mentioned under safety, an optional advanced feature for its time.
Connectivity Features:
No integrated Bluetooth or USB connectivity from factory. Requires aftermarket solutions.
Oil Change Interval:
Every 5,000-7,500 miles or 6-12 months, depending on driving conditions and oil type used (consult manual for specifics).
Coolant Change Interval:
Every 2 years or 30,000 miles.
Spark Plug Replacement:
Typically every 30,000 miles for conventional plugs, longer for platinum/iridium (check manual).
Timing Belt Replacement:
Critical item for M20 engines. Replace every 50,000-60,000 miles or 5 years. Failure can cause catastrophic engine damage.
Engine Oil Specification:
API SG/SH or ACEA A2/A3, viscosity typically 10W-40 or 15W-40 depending on climate. Consult manual for precise grades.
Coolant Specification:
BMW Blue (G48) or equivalent ethylene glycol-based antifreeze, mixed 50/50 with distilled water.
Brake Fluid Specification:
DOT 4
Fuel Injector Leaks:
Seals can degrade over time leading to fuel smell or leaks.
Rear Wheel Bearing Noise:
Common wear item, can cause humming or grinding noise.
Cooling System Leaks:
Plastic coolant expansion tanks can become brittle and crack. Water pump and thermostat housing also prone to leaks.
Eccentric Shaft Sensor Failure:
Can cause poor running and diagnostic trouble codes. Crucial for engine timing and management.
Blower Motor Resistor:
Can fail, leading to only high fan speed working.
Bmw Legacy:
BMW has a long-standing reputation for producing driver-focused, performance-oriented vehicles with a focus on engineering excellence and build quality.
E30 Introduction:
The E30 3 Series generation replaced the E21 and ran from 1982 to 1994 (with different end dates for various body styles and markets). It is considered a pivotal model for BMW, establishing many design and engineering cues still present today.
325Es Introduction:
The 'es' designation often indicated a fuel-efficient version, particularly in North America, utilizing the M20B27 'eta' (economy) engine. These models emphasized smooth cruising and better mileage over outright performance, though they still offered the classic BMW driving experience.
Production Years:
1984-1990 (for 325es specifically within the E30 lifecycle)
Manufacturing Locations:
Primarily Germany (Munich, Dingolfing), some assembly may have occurred in other BMW facilities globally.
Automotive Press Reviews:
The E30 generation, including variants like the 325es, was widely praised for its excellent handling, balanced chassis, and premium feel, earning accolades in automotive publications of its era for its driving dynamics.
Collector Status:
The E30 3 Series is highly regarded by enthusiasts and is considered a modern classic, with well-maintained examples appreciating in value.
