1986 BMW 325e Manual

The 1986 BMW 325e is part of the E30 generation, featuring the "eta" engine designed for fuel efficiency and torque. This 2.7L inline-6 engine produces 121 hp and 170 lb-ft of torque, paired with either a 5-speed manual or 4-speed automatic transmission. Key features include rear-wheel drive, independent suspension, power-assisted steering, and advanced electronics for its time. Below are essential sections covering specifications, maintenance, operation, and troubleshooting.

Vehicle Specifications

Key components: M20B27 "eta" engine, manual/automatic transmission, rear-wheel drive, independent suspension.

Specification	Details
Engine	2.7L M20B27 inline-6
Power Output	121 hp @ 4250 rpm
Torque	170 lb-ft @ 3250 rpm
Transmission	5-speed manual or 4-speed automatic
Drivetrain	Rear-wheel drive
Fuel System	Bosch L-Jetronic fuel injection
Fuel Capacity	16.4 gallons
Curb Weight	Approx. 2,600 lbs
Brakes	Front disc, rear drum
Suspension	Independent front and rear

Engine and Performance

The M20B27 "eta" engine is optimized for low-end torque and fuel efficiency.

1. Regular maintenance: Change oil every 7,500 miles with 10W-40.
2. Cooling system: Check coolant level monthly; replace every 2 years.
3. Timing belt: Replace every 60,000 miles to prevent engine damage.
4. Air filter: Inspect every 15,000 miles; replace if dirty.

WARNING! Overheating can cause head gasket failure; monitor temperature gauge.

Transmission and Drivetrain

Manual transmission offers precise shifting; automatic provides smooth operation.

1. Manual transmission: Use 75W-90 gear oil; check for leaks.
2. Clutch: Adjust free play; replace if slipping.
3. Automatic transmission: Check fluid level with engine running; use Dexron II.
4. Differential: Inspect for noise; change fluid every 30,000 miles.

CAUTION! Avoid aggressive shifting to prolong transmission life.

Maintenance Schedule

• Oil Change: Every 7,500 miles or 12 months.
• Spark Plugs: Replace every 30,000 miles.
• Timing Belt: Replace every 60,000 miles.
• Brake Fluid: Change every 2 years.
• Coolant: Replace every 2 years.
• Air Filter: Inspect every 15,000 miles.
• Fuel Filter: Replace every 30,000 miles.
• Tire Rotation: Every 7,500 miles.

Controls and Instrument Panel

Dashboard includes speedometer, tachometer, fuel gauge, temperature gauge, and warning lights.

Warning Lights: Oil pressure, battery charge, brake system, check engine.

Controls: Steering column stalks for turn signals and wipers; center console for HVAC and radio. Manual windows and mirrors standard. Cruise control optional.

Electrical System

12-volt system with alternator and battery. Fuse box located under hood.

1. Battery: Check terminals for corrosion; secure connections.
2. Alternator: Output should be 13.5-14.5 volts when running.
3. Lights: Inspect headlights, taillights, and turn signals regularly.

Tip: Keep battery terminals clean to prevent starting issues.

Braking System

Front disc brakes and rear drum brakes with power assist.

1. Brake pads: Inspect every 15,000 miles; replace if worn.
2. Brake fluid: Check level; change every 2 years.
3. Parking brake: Adjust cable if loose.
4. ABS: Not available on base models.

WARNING! Squealing or grinding noises indicate worn brakes; inspect immediately.

Suspension and Steering

Independent suspension with MacPherson struts front and semi-trailing arms rear.

1. Shocks/struts: Replace if leaking or bouncing occurs.
2. Steering: Power-assisted; check fluid level in reservoir.
3. Alignment: Check if pulling or uneven tire wear.
4. Bushings: Inspect for wear every 30,000 miles.

CAUTION! Worn suspension components affect handling; replace as needed.

Fuel System

Bosch L-Jetronic fuel injection with electric fuel pump.

1. Fuel filter: Replace every 30,000 miles.
2. Fuel pump: Listen for humming when key is on.
3. Injectors: Clean every 60,000 miles.
4. Fuel economy: Expect 22-28 mpg combined.

WARNING! Use premium unleaded fuel for optimal performance.

Safety Features

Standard features: 3-point seat belts, collapsible steering column, reinforced passenger cabin. Optional: ABS (on some models).

Troubleshooting

Symptom	Possible Cause	Corrective Action
Engine won't start	Battery/fuel/spark	Check battery charge; listen for fuel pump; inspect spark plugs.
Overheating	Coolant/thermostat	Check coolant level; test thermostat; inspect radiator.
Poor fuel economy	Air filter/tires/alignment	Replace air filter; check tire pressure; align wheels.
Brake vibration	Warped rotors	Resurface or replace front brake rotors.
Electrical issues	Alternator/fuses	Test alternator output; check relevant fuses.

Reset: Disconnect battery for 10 minutes to reset ECU if check engine light persists.

Service: Contact authorized BMW service center or visit www.bmw.com for support.