About this part
What it does. Deka 12V 300CCA 20AH VRLA Deka AUX18L stores the electrical charge that starts the engine and powers accessories with the engine off.
Symptoms that point to this part
- Slow cranking
- Dashboard lights dimming while starting
- Repeated jump starts needed
Fitment. Catalogued as fitting 2019–2021 BMW I3s, 2018–2021 BMW I3. Engine, sub-model and trim can narrow fitment further, so check those attributes on the listing before ordering.