The Interstate MTXAUX14 is a 12V AGM auxiliary battery used in many late-model start-stop vehicles (Mercedes-Benz, BMW, Audi, VW and others) to support electronics and the start-stop system. Direct-fit replacement.
Specifications
| Group Size | AUX14 |
|---|---|
| Voltage | 12V |
| Technology | AGM |
| Capacity | 12 Ah |
| Warranty | 1 year |
Will it fit?
Vehicles that call for a Group AUX14 battery.
Not sure? Use the Battery Finder with your year, make and model, match the group number on your current battery, or call (650) 583-6735.
What you get at Peninsula Battery
- Free battery testing — make sure it’s really the battery before you buy
- Ready in about 1 hour for pickup at our South San Francisco shop
- Same-day local delivery — $35 within 25 miles when you order by 1 pm (Mon–Fri); after 1 pm, next business day
- Installation available at our shop
- Old battery recycling and core exchange (a refundable core deposit may apply)
Why Peninsula Battery?
Locally owned and serving the Bay Area since 1993. Trusted by Bay Area fleets, airlines, healthcare systems and government agencies. DBE and ACDBE certified. Visit us at 1139 Airport Blvd, South San Francisco, or call (650) 583-6735 (Mon–Fri, 8:00 am–4:30 pm).