About this part
What it does. Dayco POLY RIB BELT, DAYCO Dayco 311-5060423 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 2026 BMW M440i Xdrive Gran Coupe, 2023–2026 BMW X7, 2026 BMW M340i Xdrive, 2025 BMW 540i Xdrive, 2025 BMW X5, 2025 BMW M440i, 2024–2025 BMW X6, 2025 BMW M440i Xdrive, 2024 BMW 740i Xdrive, 2023–2024 BMW 740i, 2020 Kia Stinger. Engine, sub-model and trim can narrow fitment further, so check those attributes on the listing before ordering.