Audi Q8 problems and reliability

The Audi Q8 combines the comfort of a luxury SUV with sporty performance, but owners encounter specific points of concern. This large coupé-SUV was introduced in 2018 and has since shown various technical issues ranging from electronics problems to mechanical failures. Are you interested in a Q8 or do you already own one? Then it is important to know what to look out for.

What do owners say about reliability?

The Audi Q8 scores averagely in terms of reliability. Owners appreciate its performance and luxurious character but regularly report problems with its complex technology. The first generations from 2018 and 2019 suffer from faults more often than later models. For specific information on technical complaints with Audi, you can view the common car problems with Audi.

The warranty period of 4 years or 80,000 kilometres covers many costs, but after that, repairs can become significantly expensive. Electronic systems and air suspension, in particular, prove to be sensitive points. Some owners report having to visit the dealer multiple times within the first two years for software updates and sensor problems.

Engines with teething problems

The 3.0-litre V6 diesel engine is the most popular engine type in the Q8. This engine can suffer from problems with the exhaust gas recirculation (EGR valve). This causes black smoke from the exhaust and the engine to run erratically. This primarily occurs in cars that make many short journeys.

With the 3.0 TFSI petrol engine, the ignition coils regularly fail. You will notice this by vibrations while driving and increasing fuel consumption. The turbos of this engine also start to leak oil over time. The more powerful engines in the SQ8 and RS Q8 have fewer problems but do have higher maintenance costs.

Automatic transmission with shifting problems

The 8-speed Tiptronic automatic transmission (Audi’s automatic gearbox) sometimes exhibits shifting problems. The gearbox can hesitate when shifting or refuse to engage a gear. This is often due to software errors that can be resolved with an update. In some cases, the transmission oil needs to be replaced, even if it is not in the maintenance schedule.

In models with quattro all-wheel drive, the Haldex coupling (the electronic coupling for all-wheel drive) sometimes becomes defective. This manifests as strange noises when steering or vibrations in the drivetrain. The problem primarily occurs after 60,000 kilometres. Regular maintenance of the Haldex unit prevents a lot of trouble.

Electronics and software failure

The MMI infotainment system (Audi’s central control and navigation system) is among the most reported problem areas. The screen can freeze, respond slowly, or fail completely. The Virtual Cockpit (the digital instrument cluster) behind the steering wheel has similar complaints. A reset helps temporarily, but often a software update needs to be installed.

The parking sensors regularly give false readings. Especially in wet weather or winter, malfunctions occur. The 360-degree camera can also fail or show a black screen. The adaptive cruise control sometimes switches off without reason or brakes abruptly for non-existent obstacles.

Other common electronic problems include:

• Matrix LED headlights where a lamp fails or gives error messages
• Lane assist that does not function correctly
• Keyless entry system (the keyless access system) that does not unlock the car
• Seat heating and ventilation that spontaneously fail

Air suspension requires a lot of attention

The adaptive air suspension (an automatically height-adjustable suspension system) is a weak point in the Q8. The air springs can start leaking, causing the car to sag unevenly or fail to rise after starting. Replacing a broken air spring quickly costs between 800 and 1,200 euros per piece. The system’s compressor can also become defective, resulting in an error message and loss of comfort.

Shock absorbers wear out faster than expected, especially in the heavier versions. After approximately 80,000 kilometres, you will notice that the car rides less comfortably and dips more when braking. The rubber bushings of the wheel suspension can also tear, causing knocking noises over bumps.

Brakes wear unevenly

The brake discs and pads of the Q8 sometimes wear unevenly. This is due to the car’s high weight and powerful engine. The front brakes, in particular, endure heavy strain. You will notice this by vibrations in the steering wheel during braking or a squealing sound.

For models with ceramic brakes, replacement costs are extremely high. One set of new ceramic brake discs costs between 8,000 and 12,000 euros. The standard steel brakes are much cheaper to replace but need to be done more frequently. The electric parking brake can get stuck, especially in winter due to frost or rust.

Other technical issues

The panoramic sliding roof construction can start to creak and squeak. This is due to wear of the guides and seals. In heavy rainfall, water can leak into the car via the roof drains that become clogged with leaves and dirt.

Some owners report problems with the fuel pump in petrol models. The car may then not start or stall while driving. This is a dangerous situation that needs immediate attention. The AdBlue tank in diesel models also sometimes gives error messages, preventing the engine from starting.

How to recognise problems early

Pay attention to warning lights on the dashboard. The Q8 has many sensors that signal problems before they worsen. Strange noises such as ticking, squeaking, or thumping often indicate wear or defects. Keep a close eye on the engine management light, as this can indicate emission problems or engine malfunctions.

Regularly check tyre pressure and tyre condition. Uneven tyre wear can indicate problems with the wheel suspension or alignment. Test all electronic functions monthly, from seat heating to parking sensors. This way, you discover malfunctions before they lead to bigger problems.

Maintenance advice for Q8 owners

Strictly follow the maintenance schedule. The Q8 requires maintenance every 15,000 kilometres or annually. Have software updates installed by the dealer in between, as this prevents many electronic problems. Replace the automatic transmission oil every 60,000 kilometres. This is not included in the service book but prevents many problems.

Clean the parking sensors and cameras regularly with a soft cloth. This prevents false readings. Visually inspect the air suspension for leaks or tears. Ensure that the panoramic roof drains remain clean to prevent water leakage.

For diesel models, it is important to take regular long journeys. This prevents blockages of the particulate filter and the EGR valve. Always refuel at reliable petrol stations to avoid problems with contaminated fuel.

Repair costs and when to go to the garage

Repairs to the Q8 are costly. A service at the dealer costs between 400 and 800 euros, depending on the type of maintenance. Resolving a malfunction in the infotainment system can amount to 1,500 euros if parts need to be replaced. Installing a complete new air spring costs an average of 1,000 euros per corner.

Go to the garage immediately if warning lights remain illuminated. Do not delay with engine or transmission problems, as these can quickly worsen. Software updates can often be done for free if your car is still under warranty. Minor electronic malfunctions can sometimes be resolved with a battery reset, but if the problem persists, professional inspection is required.

Buying tips for a used Q8

Check the complete service book. A Q8 without complete maintenance at an authorised dealer is a risk. During the test drive, thoroughly test all electronic functions. Drive over bumpy roads to check the air suspension and listen for strange noises.

Ask if the software is up-to-date. Many problems have been resolved in later software versions. Check if there are any open recalls for the registration number. These updates can be carried out free of charge at an Audi dealer. Check if the car still has a warranty or if an extended warranty is possible.

Important things to check when buying:

• Condition of the air suspension and height adjustment
• Operation of all screens and cameras
• Condition of the brake discs and pads
• Mileage versus maintenance history
• Any leaks under the engine

Recalls and technical bulletins

Audi has issued several recalls for the Q8. A well-known action concerned problems with the fuel supply in early production models from 2018 and 2019. There was also a recall for potentially detaching seat covers that could block the airbags.

For some series, technical service bulletins have been issued regarding software updates for the transmission and engine management. These updates can be carried out free of charge at an Audi dealer. Check the RDW website to see if there are any open actions for your specific car.

The balance between luxury and problems

The Audi Q8 offers a unique combination of space, luxury, and performance in a striking form. However, its reliability falls short of what you might expect in this price segment. Particularly the complex electronics and air suspension require a lot of attention and often lead to high costs.

For those willing to perform regular maintenance and accept potential repair costs, the Q8 is an impressive car. Preferably buy a young second-hand car with a full service history and remaining warranty. This limits financial risks and allows you to enjoy what this luxury SUV has to offer.