If you are considering buying a used Audi Q7, there are several major reliability issues worth knowing about first. Our garage database tracks 2 known faults for this model, 2 of them rated high severity. Every one below is a repair bill a seller has good reason not to mention.
Found an Audi Q7 for sale?
Paste the advert and we read it against its known faults, its MOT history and the DVLA record, and tell you what the seller has not. Free, about a minute, no card.
Check an Audi Q7 advert (free) →One owner each, in their own words rewritten as a line, and not counted in our risk scoring. A fault joins the list above once a second report or an editorial source backs it.
Sellers rarely admit these faults outright
We track 6 specific phrases sellers use in adverts to soft-pedal these exact issues. Paste any Audi Q7 advert and we check it in seconds.
Check an advert now (free) →An overdue cambelt is the most expensive thing a seller can fail to mention on a used Q7. These are the figures UK specialists work to.
3.0 V6 TDI engines suffer timing chain tensioner wear and chain stretch, with rattle commonly appearing around 90,000-100,000 miles; long-life oil and extended servicing are blamed for premature tensioner wear. The classic warning sign is a metallic rattle for 1-3 seconds on cold start. Ignoring it can let the chain jump teeth and destroy the engine. Repair is expensive because the chains sit at the back of the engine, typically GBP 1,500-2,000.
Audi treats the ZF 8HP tiptronic as filled for life, but ZF, the gearbox maker, publishes official oil-change kits and a change procedure for the Audi 8HP55A/8HP65A/8HP90A/8HP95A units, which contradicts any sealed-for-life reading. UK specialists put the interval at 50,000-60,000 miles or 8 years, sooner for towing, tuned or hard-driven cars.
Always confirm against the vehicle handbook. Intervals vary by engine, and several manufacturers revised theirs after failures in service.
The Audi Q7 has 2 known faults in our database, 2 of them rated high severity. The most serious are engine (timing chain tensioner failure causing severe rattling) and suspension (air suspension compressor failure or air strut leaks causing the vehicle to sink). None of them makes the car a bad buy on its own; the risk is a seller who knows and says nothing.
No Audi Q7 year is a write-off, but the 4L (2006 to 2015) carries the most serious faults: engine and suspension. Year matters less than whether the specific car has had the known fixes, so check the history for them.
Ask the seller about the engine and suspension faults on this page and whether they have been fixed, with invoices. On the test drive watch for loud metallic slapping/rattling from the back of the engine on cold start and car sitting unevenly or very low when parked overnight. Read the MOT history for repeat advisories, then paste the advert into the free check, which reads it against its known faults before you travel. Check a Audi Q7 advert →
Owners report 31.5 mpg on average across the Audi Q7 engines with data, about 84% of the official combined figure. The gap between official and real-world economy varies a lot by engine, so the Real MPG page lists every engine and generation separately, from 310 owner submissions. Audi Q7 Real MPG by engine →
Looking at an Audi Q7 right now? Check the advert before you go and see it.
If you used to check the Honest John “Good & Bad” section before the site closed in 2026, this page is where that information now lives. We rebuilt the Audi Q7 owner-report history from the archived Honest John dataset, added our own research, specialist and owner-club sources and DVSA recall data, and we keep it free. Each fault above is badged with its source. The same data feeds our free advert check, which reads a listing against every known fault for the exact engine and year.
CarAdCheck is not affiliated with Honest John or Volkswagen Financial Services. What happened to Honest John, and where each feature lives now.
Knowing what a Audi Q7 goes wrong with is half of it. The rest is reading the advert and checking the car's history before you hand any money over.