The 2006 Audi A3 has 6 recalls, the most serious involving the driver's frontal airbag inflator, which can rupture or explode during deployment and send metal fragments into the cabin, posing a serious injury risk to the driver and passengers.
Two separate filings cover this same inflator defect, and prior repair attempts did not fully resolve the issue, which is why multiple campaigns exist. A separate airbag concern involves long-term exposure to heat and humidity degrading the driver airbag's propellant, causing it to deploy with greater force than intended. On the side curtain airbag side, the inflator module on either the left or right curtain airbag can leak, meaning the bag may not fully inflate in a crash and provide reduced head protection. There is also a fuel system recall affecting Quattro models: a weak spring in the fuel tank ventilation valve can allow liquid fuel to migrate into the evaporative emissions system and saturate the carbon canister, which can create a fuel vapor leak and raise the risk of fire.