About this part
What it does. Dayco POLY RIB BELT, DAYCO Dayco 311-5080435 drives engine accessories such as the alternator, water pump and air-conditioning compressor.
Symptoms that point to this part
- Squealing on cold start
- Visible cracking or glazing
- Accessories losing power
Fitment. Catalogued as fitting 2022–2024 Audi A3. Engine, sub-model and trim can narrow fitment further, so check those attributes on the listing before ordering.