Buyer Research

2023 Audi A6 — Should You Buy One?

Typical asking price: $36,000–$49,000. This is one of the more reliable vehicles in its class — here's what to watch for anyway.

Deciding between model years? Compare the 14 Audi A6 years we've written up →

Kestrel Take

Two filings and one recall campaign is a nearly empty public record, and on a car this new that tells you about filing habits rather than about the car — owners still under warranty call the dealer, not NHTSA. What little is there is worth your attention though, because one of the two is an owner who lost all power on the road when water got into the gateway computer, and who points out that Audi's protective fix was applied to the model years before his and not to his. That is the check we would make first. Beyond it, run the VIN for the camera software campaign, get a pre-purchase inspection from someone who works on Audis specifically, and take the short file for what it is: not yet examined, not yet proven.

What we checked

Checked against public records, 2026-09-25

NHTSA holds 2 owner complaints for the 2023 Audi A6, and 1 recall campaign.

That is too small a record to read a pattern from, so we are not going to pretend otherwise — with numbers this low one owner moves the percentage by a lot. What has been filed is grouped under electrics and electronics (1). Treat those as things to look at, not as the vehicle's known weaknesses. A thin file usually means few of these were sold or few owners filed. It is not evidence the vehicle is trouble-free, and the issues below are our own research rather than a reading of this record.

One recall campaign covers this model year. Recalls are repaired free, for any owner, with no time limit on most safety campaigns — but only if someone books it in. Ask the seller to show it was done, or have any dealer check the VIN; it takes them a couple of minutes and costs nothing.

Counts come from the NHTSA complaint and recall database — free, public, and worth checking yourself.

Known Issues for the 2023 Audi A6

Ranked by wallet impact. These are documented, recurring problems — not freak accidents. How we decide that.

Water reaching the gateway computer and killing all power on the moveMedium

The one electrical filing on this year is severe: the gateway control module — the car's central network hub — was destroyed by water, and the driver lost all power and had to coast off the road. Audi ran a campaign on the immediately preceding model years fitting a protective cover over that module after spills in the rear seat reached it; this owner's position is that the cover does not fully do the job. Pull the rear seat cushion up, feel the carpet and padding underneath, and smell for damp. Check the sunroof drain outlets and the area below the windshield for blocked drainage while you are there, because water that gets in has to come from somewhere.

Repair cost (estimate): $900–$1,800 for the module plus coding, more if the harness is corroded

Source: NHTSA complaints filed under electrics and electronics (1).

Rearview camera image may not appear at all (recall)Medium

Recall 25V900 covers a software error that can stop the rearview camera picture displaying, which puts the car out of compliance with the federal standard requiring a rear view. The remedy is a free software update, and notification letters only went out in January 2026 — so plenty of cars on the used market still have it open. Put the car in reverse before you even drive it and confirm a clear, prompt picture, then check the VIN lookup yourself instead of taking the seller's word that it was handled.

Repair cost: $0 with the recall — verify it was performed

Source: 1 NHTSA recall campaign on this model year.

The 48-volt starter-generator that reports itself as a vague electrical faultMedium

Nothing in this year's two filings names it, and we are flagging it from the wider record on this generation rather than from 2023 evidence. The mild-hybrid system uses a belt-driven starter-generator and its own lithium battery to run stop-start and engine-off coasting, and when it weakens the dashboard usually offers a general electrical or restart-system message instead of pointing at the part. On the test drive, notice whether stop-start actually cuts the engine at a light once warm; if it never does, ask why and get the charging system tested rather than accepting that the last owner switched it off.

Repair cost (estimate): $1,200–$2,600

Source: not yet checked against public records.

Plastic coolant housings that weep before they failMedium

Another one we are raising from what this engine family does generally, not from the 2023 record, which is too thin to show it. The thermostat housing and the oil cooler mounting area are plastic and gasketed, they seep slowly, and the warning is a smell of hot syrup rather than a puddle. Open the hood cold, look for dried pink or orange residue running down the back of the block and around hose joints, and check the coolant expansion tank sits at its cold mark. A tank filled right to the top usually means someone has been topping it up.

Repair cost (estimate): $700–$2,000

Source: not yet checked against public records.

Walk-Away Red Flags

✗Damp carpet or padding under the rear seat cushion
✗Reversing camera that stays black, freezes, or shows a cancel symbol
✗Musty smell in the cabin with the ventilation off
✗Dried pink or orange coolant residue on hoses or the back of the engine
✗Stop-start that never cuts the engine once the car is warm

Good Signs

✓Recall 25V900 shown closed on the NHTSA VIN lookup
✓Dry carpet with the rear seat cushion lifted
✓Sunroof drains flushed and documented at a service visit
✓Charging system and 48-volt battery tested, with the printout
✓A clear reversing image the moment the car goes into reverse from cold