This bulletin applies to 2009-2016 Audi A5 Quattro vehicles equipped with a 2.0L Evo2 engine. The engine may judder during acceleration or run erratically. No event entry may be stored in the ECM. The air mass meter may be suspected as faulty.

1. Remove the connector of the air mass meter.

2. With the connector removed, perform a test drive under the same conditions at which the complaint occurred. Check whether the complaint persists. If it does, do not replace the air mass meter, as the cause lies elsewhere. Investigate other possible causes, such as air leaks in the air intake system, a dirty or incorrectly fitted air filter element, incorrectly slotted-in hoses on the air intake system, etc. However, if the complaint does not persist with meter connector removed, replace the air mass meter. If event entries involving throttle valve angle, the intake air temperature sensor or the charge pressure sensor are included in the ECM, resolve them before checking the air mass meter.