Most Common Car Issues

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Engine Manufacturer

Engine Model

Engine Number of Cylinders

Engine Stroke Cycles

Model

Model Year

MOST COMMON PROBLEMS

BMW 635CSi 1989

The 1989 BMW 635CSi is a classic coupe with a 3.4L engine producing 208 horsepower, courtesy of BMW-AG. Known for its sleek design and luxury features, it boasts a 2-door configuration and an automatic transmission. Manufactured in Germany, this model is part of BMW's esteemed 6 Series, providing a blend of performance and elegance.

Spec:

Engine Brake (hp) From

208

Engine Manufacturer

BMW-AG

Engine Stroke Cycles

Problems:

Oil leaks

BMW engines, especially older models, are known for developing oil leaks due to aging gaskets and seals.

Coolant system issues

Over time, components like the radiator and water pump can fail, leading to overheating problems.

Timing belt failure

Given the age of the vehicle, the timing belt may be worn out, risking severe engine damage if it breaks.

Fuel injector problems

Fuel injectors can become clogged or fail, affecting engine performance and fuel efficiency.

Vacuum leaks

Aging hoses and connections can cause vacuum leaks, leading to rough idling and poor acceleration.

Worn spark plugs

Spark plugs may be worn out or fouled, causing misfires and reduced engine performance.

Electrical issues

Older BMWs often experience electrical problems due to aging wiring and connectors, affecting various engine sensors and components.

Carbon buildup

Carbon deposits can accumulate on the intake valves and combustion chambers, reducing engine efficiency and power.

BMW 535i 1992

The 1992 BMW 535i is a classic sedan with a 3.4L inline-six engine delivering 208 hp. Manufactured by BMW AG, this 5-Series model features four doors and manual seat belts. It operates on gasoline and falls within the Class 1 weight category.

Spec:

Engine Brake (hp) From

208

Engine Manufacturer

BMW-AG

Engine Number of Cylinders

Problems:

Oil leaks

Common in older BMW engines, often from valve cover gaskets, oil pan gaskets, or rear main seals.

Cooling system failures

Issues with water pumps, radiators, or coolant hoses leading to overheating.

Vanos system problems

Failures in the variable valve timing system causing rough idling or performance loss.

Timing chain wear

Over time, the timing chain can stretch or guides can wear out, causing rattling or engine misalignment.

Fuel injector issues

Clogged or failing fuel injectors can lead to poor engine performance and misfires.

Vacuum leaks

Aging hoses and gaskets can cause air leaks, leading to rough idling and poor fuel economy.

Ignition coil failures

Faulty ignition coils can cause misfires and poor engine performance.

Carbon buildup

Over time, carbon deposits can accumulate in the intake valves, affecting performance and efficiency.

BMW 635CSi 1989

The 1989 BMW 635CSi is a classic coupe featuring a 3.4L engine with 208 horsepower, manufactured by BMW AG. This two-door passenger car, built in Munich or Dingolfing, Germany, comes with an automatic transmission and manual seat belts. It runs on gasoline and includes a driver supplemental restraint system (SRS).

Spec:

Engine Brake (hp) From

208

Engine Manufacturer

BMW-AG

Engine Stroke Cycles

Problems:

Oil leaks

BMW engines, especially older models, are known for developing oil leaks due to aging gaskets and seals.

Coolant system issues

Over time, components like the radiator and water pump can fail, leading to overheating problems.

Timing belt failure

Given the age of the vehicle, the timing belt may be worn out, risking severe engine damage if it breaks.

Fuel injector problems

Fuel injectors can become clogged or fail, affecting engine performance and fuel efficiency.

Vacuum leaks

Aging hoses and connections can cause vacuum leaks, leading to rough idling and poor acceleration.

Worn spark plugs

Spark plugs may be worn out or fouled, causing misfires and reduced engine performance.

Electrical issues

Older BMWs often experience electrical problems due to aging wiring and connectors, affecting various engine sensors and components.

Carbon buildup

Carbon deposits can accumulate on the intake valves and combustion chambers, reducing engine efficiency and power.

BMW 635CSi 1989

The 1989 BMW 635CSi is a classic 2-door coupe powered by a 3.4L engine producing 208 horsepower. Manufactured by BMW AG, this model features a 6-stroke cycle engine, an automatic transmission, and primary gasoline fuel. Built in Munich or Dingolfing, Germany, it includes a manual seat belt and a Supplemental Restraint System (SRS) for added safety.

Spec:

Engine Brake (hp) From

208

Engine Manufacturer

BMW-AG

Engine Stroke Cycles

Problems:

Oil leaks

BMW engines, especially older models, are known for developing oil leaks due to aging gaskets and seals.

Coolant system issues

Over time, components like the radiator and water pump can fail, leading to overheating problems.

Timing belt failure

Given the age of the vehicle, the timing belt may be worn out, risking severe engine damage if it breaks.

Fuel injector problems

Fuel injectors can become clogged or fail, affecting engine performance and fuel efficiency.

Vacuum leaks

Aging hoses and connections can cause vacuum leaks, leading to rough idling and poor acceleration.

Worn spark plugs

Spark plugs may be worn out or fouled, causing misfires and reduced engine performance.

Electrical issues

Older BMWs often experience electrical problems due to aging wiring and connectors, affecting various engine sensors and components.

Carbon buildup

Carbon deposits can accumulate on the intake valves and combustion chambers, reducing engine efficiency and power.

BMW 735i 1992

The 1992 BMW 735i is a classic sedan powered by a 3.4L inline-6 engine delivering 208 horsepower. Built by BMW AG, this 7 Series model offers a blend of luxury and performance with a focus on safety, featuring a Driver Supplemental Restraint System (SRS) and manual seat belts.

Spec:

Engine Brake (hp) From

208

Engine Manufacturer

BMW-AG

Engine Number of Cylinders

Problems:

Oil leaks

Common in older BMW engines, often due to worn gaskets and seals.

Cooling system issues

Radiators, water pumps, and thermostats are known to fail, causing overheating.

Timing chain wear

Over time, the timing chain can stretch or the tensioner can fail, leading to poor engine performance.

Vanos problems

The variable valve timing system (VANOS) can suffer from oil leaks or mechanical failure, causing rough idling and reduced power.

Fuel injector issues

Clogged or failing fuel injectors can lead to poor fuel economy and misfires.

Mass air flow (maf) sensor failure

A faulty MAF sensor can cause poor engine performance and fuel efficiency.

Crankshaft position sensor failure

This sensor can fail, leading to starting issues and stalling.

Vacuum leaks

Cracked or damaged vacuum hoses can cause rough idling and poor acceleration.

Spark plug and ignition coil problems

Worn spark plugs or failing ignition coils can cause misfires and reduced engine performance.

BMW 635CSi 1989

The 1989 BMW 635CSi is a sleek 2-door coupe powered by a 3.4L engine producing 208 hp. Manufactured in Germany, this model features a manual seat belt system and an automatic transmission. It’s a classic representation of BMW's engineering and design excellence from the late '80s.

Spec:

Engine Brake (hp) From

208

Engine Manufacturer

BMW-AG

Engine Stroke Cycles

Problems:

Oil leaks

BMW engines, especially older models, are known for developing oil leaks due to aging gaskets and seals.

Coolant system issues

Over time, components like the radiator and water pump can fail, leading to overheating problems.

Timing belt failure

Given the age of the vehicle, the timing belt may be worn out, risking severe engine damage if it breaks.

Fuel injector problems

Fuel injectors can become clogged or fail, affecting engine performance and fuel efficiency.

Vacuum leaks

Aging hoses and connections can cause vacuum leaks, leading to rough idling and poor acceleration.

Worn spark plugs

Spark plugs may be worn out or fouled, causing misfires and reduced engine performance.

Electrical issues

Older BMWs often experience electrical problems due to aging wiring and connectors, affecting various engine sensors and components.

Carbon buildup

Carbon deposits can accumulate on the intake valves and combustion chambers, reducing engine efficiency and power.

BMW 635CSi 1989

The 1989 BMW 635CSi is a classic coupe with a 3.4L inline-6 engine producing 208 hp, designed and manufactured by BMW AG in Germany. This model features a manual transmission and offers a sporty, engaging driving experience with its 2-door configuration. The vehicle also includes a supplemental restraint system (SRS) for added safety.

Spec:

Engine Brake (hp) From

208

Engine Manufacturer

BMW-AG

Engine Number of Cylinders

Problems:

Oil leaks

The BMW 635CSi, especially from the late 1980s, is prone to oil leaks due to aging gaskets and seals.

Cooling system failures

Radiators and water pumps can fail, leading to engine overheating.

Vacuum leaks

Aging rubber hoses and connections can develop leaks, causing rough idling and poor performance.

Fuel injector issues

Clogged or faulty fuel injectors can lead to poor engine performance and misfires.

Electronic control unit (ecu) problems

The ECU can develop faults over time, leading to erratic engine behavior.

Timing belt/chain wear

Worn timing belts or chains can cause engine misfires and potential catastrophic engine damage if they fail.

Valve cover gasket leaks

Common in older BMW engines, leading to oil leakage and potential engine damage.

Throttle body issues

Carbon buildup can cause the throttle body to stick, leading to acceleration problems.

Spark plug and ignition coil failures

Can cause misfires and rough engine performance.

BMW 535i 1991

The 1991 BMW 535i is a classic sedan from the renowned 5-Series lineup. Powered by a 3.4L inline-six engine producing 208 hp, it combines performance and luxury. Manufactured in Dingolfing, Germany, this model features an automatic transmission and a manual seat belt system. Perfect for those who appreciate vintage BMW engineering.

Spec:

Engine Brake (hp) From

208

Engine Manufacturer

BMW-AG

Engine Model

4-Value

Engine Number of Cylinders

Problems:

Oil leaks

The 1991 BMW 535i often suffers from engine oil leaks, particularly from the valve cover gasket and oil pan gasket.

Cooling system failures

Issues with the radiator, water pump, and cooling hoses are common, leading to overheating problems.

Timing chain tensioner issues

The timing chain tensioner can wear out, causing timing chain noise and potentially severe engine damage if not addressed.

Vacuum leaks

Vacuum hoses and intake manifold gaskets can deteriorate over time, leading to rough idling and performance issues.

Fuel injector problems

Over time, the fuel injectors can become clogged or fail, causing misfires and poor engine performance.

Ignition system failures

The ignition coils and spark plugs may need frequent replacement due to wear, leading to misfires and reduced power.

Pcv valve issues

The Positive Crankcase Ventilation (PCV) valve can fail, causing oil consumption and vacuum leaks.

Mass air flow sensor (maf) failure

The MAF sensor can become dirty or fail, leading to incorrect air-fuel mixture and engine performance issues.