The Audi A8 with an 8-cylinder engine is known to consume more oil than usual. Owners may need to monitor oil levels frequently and top up more often.

Direct injection engines like those in the A8 can suffer from carbon buildup on the intake valves, leading to performance issues and rough idling.

This model may experience timing chain tensioner issues, which can cause a rattling noise on startup and potentially lead to engine damage if not addressed.

The engine can be prone to coolant leaks, which may result from failing seals or hoses, leading to overheating if not repaired.

If equipped with a turbocharger, the A8's turbo can experience issues such as oil leaks, worn bearings, or failure, resulting in reduced performance and efficiency.

The fuel injectors in the A8 can become clogged or fail, leading to misfires, poor fuel economy, and reduced engine performance.

Given the specific emissions standards, components like the catalytic converter or EGR valve may fail, causing the check engine light to turn on and potentially affecting the vehicle's ability to pass emissions tests.

The Audi A8 with an 8-cylinder engine is known to consume more oil than usual. Owners may need to monitor oil levels frequently and top up more often.

Direct injection engines like those in the A8 can suffer from carbon buildup on the intake valves, leading to performance issues and rough idling.

This model may experience timing chain tensioner issues, which can cause a rattling noise on startup and potentially lead to engine damage if not addressed.

The engine can be prone to coolant leaks, which may result from failing seals or hoses, leading to overheating if not repaired.

If equipped with a turbocharger, the A8's turbo can experience issues such as oil leaks, worn bearings, or failure, resulting in reduced performance and efficiency.

The fuel injectors in the A8 can become clogged or fail, leading to misfires, poor fuel economy, and reduced engine performance.

Given the specific emissions standards, components like the catalytic converter or EGR valve may fail, causing the check engine light to turn on and potentially affecting the vehicle's ability to pass emissions tests.

Common in V8 engines, oil leaks can occur from valve cover gaskets, oil pan gaskets, or rear main seals.

The timing chain can stretch or the tensioner can fail, leading to engine misfires and potential severe damage.

Direct fuel injection engines like the one in the S8 can suffer from carbon buildup on intake valves, affecting performance and fuel economy.

If equipped with a turbocharger, it may fail due to oil starvation, contamination, or general wear and tear.

Possible coolant leaks from the water pump, radiator, or hoses can lead to overheating and engine damage.

The ignition coils can wear out over time, causing misfires and rough running.

A malfunctioning Positive Crankcase Ventilation (PCV) valve can lead to oil consumption issues and rough idle.

The HPFP can fail, leading to low fuel pressure and poor engine performance.

A faulty thermostat can cause the engine to run too hot or too cold, impacting performance and efficiency.