BMW 3 Series E36 (1990–2000) — common faults, maintenance guides and repair tips.
The most common causes are an intake-side air leak, a dirty or faulty idle control valve, a faulty lambda sensor and the crankshaft position sensor. R...
The most common causes are a weak battery, an oxidised engine ground cable or poor contact in the cables. Battery voltage can look fine even if the gr...
1. Fill with coolant on a cold engine and open the bleed screw on the neck (a large black plastic cross-head screw next to the filler cap). 2. Pour co...
Typical symptoms are fluctuating revs at idle and high fuel consumption. The fault also shows up in the emissions test. Read the fault codes before bu...
In BMW manual gearboxes the 1-2 shift is typically a little stiff, especially when cold. The problem is often fixed by changing the gearbox oil, and a...
With the engine running, carefully spray a flammable spray, such as brake cleaner or starter fluid, on the intake manifold joints and hoses. If the re...
ATF oil suits the manual gearbox, for example Mobil ATF 220, and the amount is about 1.1 litres. Add the oil through the side filler hole until the le...
The most common causes are poor solder joints on the circuit board, dried-out capacitors and a loose connector or ground. First check the fuses and th...
The most common cause is a stuck water valve, which controls the flow of hot coolant to the heater core. Other causes are air in the system, a coolant...
The Euro E36 has no check engine light, and an ordinary OBD reader does not work. The codes are read with an ADS cable and an old BMW diagnostic progr...
The specification is 3.5 bar. The easiest way to measure the pressure is at the fuel system valve with a ready-made adapter. If you have no adapter, r...
The older-type VANOS can rattle. Upgrade parts (retrofit) are available, and from March 1995 a newer part has been used at the factory. If the noise c...
Yes, the release bearing is worth replacing with the clutch. It often starts to make noise before other symptoms. If the disc and pressure plate are i...
A couple of seconds of tapping after a night is common. Hydraulic valve lifters drain of oil while standing and go quiet when the oil pressure rises. ...
The most common cause is a wheel speed sensor or its wire. Another common cause is the sensor measuring brake pedal movement on the side of the brake ...
Fitting the large 18-button on-board computer requires an outside temperature sensor, one wire to the turn signal stalk, four wires behind the instrum...
In the M50 engine the original is Bosch F7LDCR or NGK BKR6EK. The BMW part numbers are Bosch 12129063428 and NGK 12129064619. If the engine runs well,...
A typical cause is the blue comfort relay under the steering column, whose solder joints have cracked. The relay can be re-soldered or replaced with a...
The most common cause is an intake air leak. First check the accordion hose between the mass air flow sensor and the intake manifold and the air intak...
The most common cause is worn front bushings on the rear control arm. A worn rear subframe bushing and poor rear shock absorbers can also cause wander...
A common fault is the rear subframe mounting tearing out of the body; the tear can be seen from the underside of the rear of the car. Worn large rubbe...
The most common cause is the wiring loom going to the boot lid, whose wires break as they flex. The break can be found by bending the wire bundle one ...
The most common cause is the top mount of the rear shock absorber, that is the rubber, which wears and starts to rattle. The mounts and rubbers are re...
The cause is usually the valve cover gasket. The spark plug well seals come in the same kit and should be replaced at the same time. The oil can cause...
The pump often fails between 150,000 and 200,000 km, so replacing it at around 150,000 km is advisable. Signs are squealing or a strange noise from th...
A common cause is an oxidised rear fog light socket with poor contact, even if the bulb seems to work. The oxidation is removed with contact cleaner; ...
The most common cause is a refrigerant leak. The leak is often at the condenser (the core in the bumper) or at the service valve adapter and Schrader ...
The most common cause is a disconnected or broken wire, for example after disconnecting the battery. Other causes are loose or oxidised connectors und...
Start with air leaks on the intake side: the bellows hose between the mass air flow sensor and the intake manifold, the idle control valve hose and th...
The most common cause is front axle play: worn lower ball joints, tie rod ends or rear bushings of the lower control arm. Replacing the discs alone do...
Six-cylinder E36 models have had a timing chain from 1991 onwards, including Finnish-market cars. The manufacturer gives no replacement interval for t...
Usually the thermostat is stuck open. With a working thermostat the temperature gauge stays in the middle range. If the engine warms up but the cabin ...
In a car with air conditioning the filter is rectangular and sits in the blower housing behind the glovebox. Remove the glovebox and the cardboard pan...
The most common cause is a fault in the blower series resistor. In a car with automatic climate control the blower does not work at speeds 1–3, only a...
The most common cause is the microswitch in the door lock striker, which is worn or does not press down far enough. Adjusting or cleaning the switch o...
Often the pin on the lock housing shaft has broken. The pin comes with a new housing, and a used housing is usually a cheaper repair than a new one. A...
The caliper pistons seize, so pieces that have come loose rub the disc. There can also be sand in between. The part number of the rear caliper seal ki...
The oil burns in the combustion chamber. The causes are a broken diaphragm in the oil separator (separator), valve stem seals or piston rings. An exte...