The Porsche 928 often experiences oil leaks due to aging gaskets and seals.

The timing belt can wear out or fail, leading to significant engine damage if not replaced at recommended intervals.

Radiator and water pump failures are common, leading to overheating issues.

Aging hoses and fittings can develop leaks, causing poor engine performance and rough idling.

Faulty wiring and failing sensors can lead to various engine management issues.

Over time, fuel injectors can become clogged or fail, leading to poor fuel economy and engine performance.

Due to the age of the car, seals and gaskets may become worn, leading to oil leaks, especially around the valve cover, oil pan, and timing cover.

Older BMWs, particularly those with V12 engines, often experience problems with the cooling system, including radiator leaks, water pump failures, and thermostat issues.

The complex electrical systems in older BMWs can develop faults, including issues with the battery, alternator, and various sensors.

Worn spark plugs, ignition coils, or fuel injectors can lead to engine misfires, which are common in high-mileage vehicles.

The timing chain and its components can wear out over time, potentially leading to engine performance issues and, in severe cases, engine damage.

Cracked or deteriorated vacuum hoses can cause rough idling, poor fuel economy, and performance issues.

The fuel pump, fuel filter, and fuel injectors may experience wear and tear, leading to reduced engine performance or starting problems.

Over time, the exhaust system components can rust, leading to leaks, increased emissions, and noise issues.

Due to the age of the car, seals and gaskets may become worn, leading to oil leaks, especially around the valve cover, oil pan, and timing cover.

Older BMWs, particularly those with V12 engines, often experience problems with the cooling system, including radiator leaks, water pump failures, and thermostat issues.

The complex electrical systems in older BMWs can develop faults, including issues with the battery, alternator, and various sensors.

Worn spark plugs, ignition coils, or fuel injectors can lead to engine misfires, which are common in high-mileage vehicles.

The timing chain and its components can wear out over time, potentially leading to engine performance issues and, in severe cases, engine damage.

Cracked or deteriorated vacuum hoses can cause rough idling, poor fuel economy, and performance issues.

The fuel pump, fuel filter, and fuel injectors may experience wear and tear, leading to reduced engine performance or starting problems.

Over time, the exhaust system components can rust, leading to leaks, increased emissions, and noise issues.

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

Radiators, water pumps, and thermostats may fail, leading to overheating.

Can cause engine misfires or damage if the chain stretches or breaks.

Can result in poor engine performance or fuel economy.

Can lead to rough idling and poor acceleration.

Can cause misfires and poor engine performance.

Can cause oil to leak onto the exhaust system, creating a burning oil smell.

Can lead to poor fuel economy and engine performance issues.

Can cause high oil consumption and rough running.

Older Porsche engines, like the one in the 1990 Porsche 928, are prone to developing oil leaks, especially from valve cover gaskets and oil pan gaskets.

The timing belt in the 928's engine can wear out or break if not replaced at recommended intervals, leading to severe engine damage.

The cooling system components, such as the radiator and water pump, can fail over time, causing the engine to overheat.

Fuel injectors can become clogged or fail, leading to poor engine performance and misfires.

The 1990 Porsche 928 is known for having electrical problems, particularly with the ignition system and engine control unit (ECU).

Aging hoses and seals can develop vacuum leaks, affecting engine performance and fuel efficiency.

Engine mounts can wear out over time, causing excessive engine movement and vibrations.

Components of the exhaust system, such as the exhaust manifold and catalytic converter, can corrode and fail, leading to increased emissions and noise.

The BMW 750iL, especially with a V12 engine, is known for oil leaks from various gaskets and seals, including the valve cover gaskets and oil pan gasket.

The V12 engine can experience coolant leaks from the radiator, water pump, and hoses, which can lead to overheating issues.

The fuel injectors on the 750iL can become clogged or fail, leading to poor engine performance and misfires.

The timing chain and its components can wear out over time, causing rattling noises and potential engine timing issues.

Given the complexity of the 750iL's electrical system, issues with sensors, wiring, and the engine control unit (ECU) can arise.

Vacuum hoses can become brittle and crack, leading to engine performance problems and rough idling.

The mass air flow (MAF) sensor can fail, causing issues with air-fuel mixture and resulting in poor engine performance.

Over time, carbon deposits can build up in the intake valves and combustion chambers, leading to reduced engine efficiency and performance.

Due to the age of the car, seals and gaskets may become worn, leading to oil leaks, especially around the valve cover, oil pan, and timing cover.

Older BMWs, particularly those with V12 engines, often experience problems with the cooling system, including radiator leaks, water pump failures, and thermostat issues.

The complex electrical systems in older BMWs can develop faults, including issues with the battery, alternator, and various sensors.

Worn spark plugs, ignition coils, or fuel injectors can lead to engine misfires, which are common in high-mileage vehicles.

The timing chain and its components can wear out over time, potentially leading to engine performance issues and, in severe cases, engine damage.

Cracked or deteriorated vacuum hoses can cause rough idling, poor fuel economy, and performance issues.

The fuel pump, fuel filter, and fuel injectors may experience wear and tear, leading to reduced engine performance or starting problems.

Over time, the exhaust system components can rust, leading to leaks, increased emissions, and noise issues.

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

Radiators, water pumps, and thermostats may fail, leading to overheating.

Can cause engine misfires or damage if the chain stretches or breaks.

Can result in poor engine performance or fuel economy.

Can lead to rough idling and poor acceleration.

Can cause misfires and poor engine performance.

Can cause oil to leak onto the exhaust system, creating a burning oil smell.

Can lead to poor fuel economy and engine performance issues.

Can cause high oil consumption and rough running.

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

Radiators, water pumps, and thermostats may fail, leading to overheating.

Can cause engine misfires or damage if the chain stretches or breaks.

Can result in poor engine performance or fuel economy.

Can lead to rough idling and poor acceleration.

Can cause misfires and poor engine performance.

Can cause oil to leak onto the exhaust system, creating a burning oil smell.

Can lead to poor fuel economy and engine performance issues.

Can cause high oil consumption and rough running.

The Porsche 928 often experiences oil leaks due to aging gaskets and seals.

The timing belt can wear out or fail, leading to significant engine damage if not replaced at recommended intervals.

Radiator and water pump failures are common, leading to overheating issues.

Aging hoses and fittings can develop leaks, causing poor engine performance and rough idling.

Faulty wiring and failing sensors can lead to various engine management issues.

Over time, fuel injectors can become clogged or fail, leading to poor fuel economy and engine performance.

Due to the age of the car, seals and gaskets may become worn, leading to oil leaks, especially around the valve cover, oil pan, and timing cover.

Older BMWs, particularly those with V12 engines, often experience problems with the cooling system, including radiator leaks, water pump failures, and thermostat issues.

The complex electrical systems in older BMWs can develop faults, including issues with the battery, alternator, and various sensors.

Worn spark plugs, ignition coils, or fuel injectors can lead to engine misfires, which are common in high-mileage vehicles.

The timing chain and its components can wear out over time, potentially leading to engine performance issues and, in severe cases, engine damage.

Cracked or deteriorated vacuum hoses can cause rough idling, poor fuel economy, and performance issues.

The fuel pump, fuel filter, and fuel injectors may experience wear and tear, leading to reduced engine performance or starting problems.

Over time, the exhaust system components can rust, leading to leaks, increased emissions, and noise issues.

Older Porsche engines, like the one in the 1990 Porsche 928, are prone to developing oil leaks, especially from valve cover gaskets and oil pan gaskets.

The timing belt in the 928's engine can wear out or break if not replaced at recommended intervals, leading to severe engine damage.

The cooling system components, such as the radiator and water pump, can fail over time, causing the engine to overheat.

Fuel injectors can become clogged or fail, leading to poor engine performance and misfires.

The 1990 Porsche 928 is known for having electrical problems, particularly with the ignition system and engine control unit (ECU).

Aging hoses and seals can develop vacuum leaks, affecting engine performance and fuel efficiency.

Engine mounts can wear out over time, causing excessive engine movement and vibrations.

Components of the exhaust system, such as the exhaust manifold and catalytic converter, can corrode and fail, leading to increased emissions and noise.

Due to the age of the car, seals and gaskets may become worn, leading to oil leaks, especially around the valve cover, oil pan, and timing cover.

Older BMWs, particularly those with V12 engines, often experience problems with the cooling system, including radiator leaks, water pump failures, and thermostat issues.

The complex electrical systems in older BMWs can develop faults, including issues with the battery, alternator, and various sensors.

Worn spark plugs, ignition coils, or fuel injectors can lead to engine misfires, which are common in high-mileage vehicles.

The timing chain and its components can wear out over time, potentially leading to engine performance issues and, in severe cases, engine damage.

Cracked or deteriorated vacuum hoses can cause rough idling, poor fuel economy, and performance issues.

The fuel pump, fuel filter, and fuel injectors may experience wear and tear, leading to reduced engine performance or starting problems.

Over time, the exhaust system components can rust, leading to leaks, increased emissions, and noise issues.

Older Porsche engines, like the one in the 1990 Porsche 928, are prone to developing oil leaks, especially from valve cover gaskets and oil pan gaskets.

The timing belt in the 928's engine can wear out or break if not replaced at recommended intervals, leading to severe engine damage.

The cooling system components, such as the radiator and water pump, can fail over time, causing the engine to overheat.

Fuel injectors can become clogged or fail, leading to poor engine performance and misfires.

The 1990 Porsche 928 is known for having electrical problems, particularly with the ignition system and engine control unit (ECU).

Aging hoses and seals can develop vacuum leaks, affecting engine performance and fuel efficiency.

Engine mounts can wear out over time, causing excessive engine movement and vibrations.

Components of the exhaust system, such as the exhaust manifold and catalytic converter, can corrode and fail, leading to increased emissions and noise.