Genuine BMW Auxiliary Battery; E1BI-EP Battery 20AH | 61212286201

BMW i3, i3s
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P/N: 61212286201 Genuine BMW
E1BI-EP Battery 20AH
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Cross References:
  • Genuine BMW replacement E1BI-EP 20Ah battery
  • Starter battery and battery for vehicle accessories when the vehicle is not running on BMW i3 models
  • (1) per vehicle
  • This battery replaces failed auxiliary batteries that will not charge causing the vehicle not to start
  • Fits BMW i3 2014-2021, i3 Range Extender 2014-2021, i3s 2020-2021, and i3s Range Extender 2018-2021

Your vehicle’s auxiliary battery is a secondary 12V battery used to power electrical accessories that require a consistent 12 volts to operate and/or electrical components that can be affected by voltage spikes and drops.

Auxiliary batteries vary in shape and size, can be located in the engine bay, rear cargo compartment, or even under a seat, and are wired in parallel to the main battery to isolate connected electrical accessories and keep them powered even when your vehicle is turned off.

Signs of a Failing BMW Auxiliary Battery
Failed auxiliary batteries can leave vehicle functions like electronic steering assist, radar controlled cruise control, central locking systems, and even emergency braking systems inoperable. The auxiliary battery often controls electronic safety features therefore warning lights and messages are usually displayed on your vehicle’s display at start that cannot be cleared until the battery is replaced.

Replacing a BMW Auxiliary Battery
Due to their varying locations, auxiliary batteries can take anywhere from 15 minutes to 2 hours to replace and often require programming to your vehicle's ECM or PCM to function correctly. Furthermore, it is highly recommended to replace your vehicle’s auxiliary battery whenever your vehicle’s main battery requires replacement due to the additional electrical strain a failed main battery places on the auxiliary battery.

Any Genuine brand part is obtained directly through our vehicle dealership network from your vehicle's manufacturer. This is always your best option for getting the exact same part that is being replaced and will be the latest version design.
Left = Driver side and Right = Passenger side.
All parts are priced individually unless identified as a set or kit. "Per car" notes identify how many of a given part your car has and "Left/Right or Front/Rear" notes means the part fits the left or right side of the car. These parts are still sold individually and you'll need to select the appropriate quantity if you plan to replace more than one of this item.

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What This Genuine BMW Auxiliary Battery Fits?

Application information below is for reference only and should not be used to determine the exact vehicle fitment. Please use the "Make Sure It Fits" vehicle selection box above to determine the exact fitment and review any application notes. If you need any help determining if this part works with your vehicle, please don't hesitate to contact us.

14-21 - i3 Base, Range Extender
18-21 - i3s Base, Range Extender