This page covers 5 recalls, 12 owner complaints and EPA fuel economy for the 2018 Audi A3 Cabriolet.
28 mpg combined
8.4 L/100km
Subcompact Cars
Fuel economy data from fueleconomy.gov (EPA / U.S. Dept. of Energy). Annual cost based on 15,000 mi/yr at 55% city driving and current fuel prices. MPG is U.S. gallons; L/100km converted.
Airbag-related complaints make up the clear majority of what owners report for the 2018 Audi A3 Cabriolet. Across multiple reports, owners describe concerns with airbag components, with several noting that replacement parts were unavailable through dealers at the time of their complaint. Outside the airbag system, the complaint set is thin, a single report each for tires and wheels appears, neither forming a meaningful pattern. One isolated report describes fuel leaking near the rear passenger-side fuel tank area along with a check engine light, and another describes a battery drain leading to a stall and no-start condition requiring a jump-start. The airbag part-availability issue is the most consistently repeated detail across these owner reports.
12
Total Complaints
By System
The 2018 Audi A3 Cabriolet has 5 recalls, the most serious being a fuel hose connector that can detach from the supply line in the engine bay, spilling fuel near hot components and raising the risk of an engine fire.
Two recalls involve the rear seat head restraints: on certain vehicles, the guide sleeves that hold the restraints in place may be incorrectly welded to the seat frame, reducing restraint stability in a crash, and the latching pins for the center rear head restraint may be missing entirely, allowing it to detach and strike occupants. The passenger seat occupant detection system can also develop a false fault and shut off the front passenger airbag, leaving that seat without airbag protection in a crash. On the engine side, a software issue in the engine control unit can misread flywheel movement at startup as an engine knock, causing the engine to adjust its fuel mixture and stall.
At a glance
What can fail
A faulty electrical connection in the passenger air bag detection system may cause it to incorrectly sense a problem and turn off the passenger air bag.
What the fix does
The dealer will replace the connector and reroute the cable to restore proper air bag operation.
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Complaints are owner-reported and reflect individual experiences, not confirmed defects. They are distinct from recalls. Data sourced from the national vehicle safety complaint database. See trending complaints →
Summarized — see the official notice for exact wording, dates, and contacts.
At a glance
What can fail
The center rear seat head restraint may be missing its latching pins, which secure it in place.
What the fix does
Dealers will inspect the head restraints and replace any missing pins at no cost.
Summarized — see the official notice for exact wording, dates, and contacts.
At a glance
What can fail
The fuel hose quick connector in the engine bay may detach from the fuel supply line, causing fuel to leak.
What the fix does
Dealers will secure the fuel line connection at no cost.
Summarized — see the official notice for exact wording, dates, and contacts.
At a glance
What can fail
The rear seat head restraint guide sleeves may be incorrectly welded to the seat frame, potentially affecting head restraint function.
What the fix does
Dealers will inspect the guide sleeves for incorrect welds and replace the rear seat frame if needed, at no cost.
Summarized — see the official notice for exact wording, dates, and contacts.
At a glance
What can fail
The engine control software may misread the flywheel motion during startup as engine knock, causing incorrect fuel-air mixture adjustment and engine stall.
What the fix does
Dealers will reprogram the engine control software at no cost to correct the misinterpretation.
Summarized — see the official notice for exact wording, dates, and contacts.
