Audi RS Q8 buying guide

Early cars pair the original styling with a 591-horsepower V8 and 590 lb-ft through an 8-speed Tiptronic. CarScout says the engine runs a 48-volt mild hybrid system with quattro, and that it needs premium fuel. Standard kit includes sport air suspension, larger RS brakes, wider tire fitments and carbon fiber interior trim.

For 2025 Carvana says the U.S. car became the Performance, with new styling, 631 horsepower, ceramic brakes and uprated chassis hardware. That is the version to look at if you want the extra power. Our RS Q8 price guide shows how model years compare in the market.

Check the spec on any car you view. RAC Drive says the four-wheel steering and the 48V anti-roll system are standard or optional depending on trim, and that the top Vorsprung version is the one you need for both. Our tracking lists a single RS Q8 version, so confirm both systems are fitted on the particular car.

The sources disagree on model years. RerEV says to approach 2020 and 2021 most carefully because of recall burden, and rates 2022 and 2023 best. MotorHub rates 2020 and 2021 as the most reliable and recommended. Whatever the year, the 2021 engine campaign is the first thing to settle. The RS Q8 market page shows every car for sale by year.

The faults below run from most to least serious, and several are already covered by recalls.

Cylinder bore cracking

NHTSA campaign 21V339 applies to certain 2021 SQ8 and RS Q8 vehicles, where cracks may form on the cylinder bore surface. CarScout says Audi's fix is a complete replacement engine, free of charge.

48V starter generator failure

On the Q8 family the belt starter generator can fail and stall the engine, and power steering and vacuum-assisted braking go with it. All 48V-equipped Q8 variants are affected, RS Q8 included.

Oil consumption

CarScout says the EA825 engine family uses more oil than average. Service history matters here, and the inspection list below says what to look for.

Air suspension faults

Air spring leaks, compressor failures and control module trouble show up as a sagging or uneven stance, reduced ride comfort and warning lights. A technical service bulletin for adaptive suspension is on file with NHTSA for 2020-2023 cars.

Carbon on the intake valves

Because the engine uses direct injection, carbon builds up on the intake valve stems. Walnut blasting is the usual cure.

Brake wear

Even the carbon-ceramic brakes can wear quickly under spirited driving, according to RerEV and MotorHub. Squeaking or grinding, a soft pedal and a burning smell after heavy braking are the signs.

Electrical glitches

Owners report frozen screens, random warning lights and parking or blind-spot sensors that misbehave. In some cases an electrical malfunction warning was followed by a full shutdown.

Software recalls

A rearview camera software error (NHTSA 25V-900) affects RS Q8 model years 2020-2026. A 2021 recall for instrument panel display failure covered 1,122 RS Q8 units, and both are fixed by a free dealer software update.

Carlyle puts an oil and filter service every 10,000 miles at $220 to $400, using full-synthetic 0W-40. The 60,000-mile service, with V8 spark plugs and ZF 8-speed fluid and filter, runs $1,300 to $2,500. Audi's schedule, per Kelley Blue Book, is a minor service every 10,000 miles and a standard service every 20,000 miles.

Walnut blasting costs $400 to $600 at most independent Audi shops, CarScout says, and is expected every 40,000 to 60,000 miles. CarScout also budgets $1,200 to $2,000 for a set of tires (typically 285/35R22 or similar) and $800 to $1,500 for brake work, an amount it puts on top of what the SQ8 would need.

Carlyle's estimates for the big repairs: air suspension at $1,900 to $4,000 per corner and $900 to $1,700 for the compressor, typically from 60,000 to 110,000 miles. A turbocharger failure is $5,000 to $9,000, typically at 90,000 to 140,000 miles. The 48V active roll actuator is $2,000 to $4,000, and a water pump or thermostat leak is $1,300 to $2,200. For a sense of the market, see the cheapest RS Q8 listings and our Audi RS Q8 vs Lamborghini Urus comparison.

Look first at 2022 and 2023 cars, which RerEV rates best, or the 2025 Performance if you want 631 horsepower. A 2020 or 2021 car needs documented recall work, above all the engine replacement on 2021 cars. Oil consumption and intake carbon have no recall, so expect to deal with them yourself. For wider comparison see our best used luxury SUVs ranking, or browse used Audi models.

Budget for tires and brakes that cost more than on an SQ8, and a repair fund for the air suspension, since the estimates run to $4,000 per corner.