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Bmw I3 High Voltage Disconnect

By the Editorial Staff

March 24, 2026

BMW i3 REX High Voltage System Deactivation - YouTube
BMW i3 REX High Voltage System Deactivation - YouTube Image via www.youtube.com
I fixed my BMW i3 High Voltage Problem for FREE - YouTube
I fixed my BMW i3 High Voltage Problem for FREE - YouTube Image via www.youtube.com

Are you referring to the orange high-voltage disconnect pictured on this Web page? On our 2014 U.S. i3, this disconnect is totally orange as in the images included on the referenced Web page with nothing red or green as in your description. The 2 images of the disconnect on the referenced Web page show it mounted in different orientations 90ยบ.

The most over-engineered part of ~2018+ model years: the high-voltage ...
The most over-engineered part of ~2018+ model years: the high-voltage ... Image via www.reddit.com

Today we isolate s high voltage battery for maintenance operations on this BMW i3 REX. I didn't. The work you're doing to replace the 12v is not near the high voltage stuff.

Does the BMW i3 have a 12 volt battery?
Does the BMW i3 have a 12 volt battery? Image via carolinasbmwmoa.org

Also, you might want to clip a battery charger to your battery cables before disconnecting the old 12v battery. By putting a charger on, you avoid all the nonsense caused by shutting down the 12v side of the car. Disconnect the charger after you've installed and connected the new 12v.

2017 BMW i3 Bridge, high-voltage interlock loop. System, Electrical ...
2017 BMW i3 Bridge, high-voltage interlock loop. System, Electrical ... Image via parts.bmwofstratham.com

As a best practice, disconnect both the 12 V battery and the high-voltage battery service disconnect. (Note: Always disable the high-voltage battery following the vehicle makers repair information and follow all safety precautions.). When reconnecting the high voltage connector on a 2017 BMW i3, ensure alignment of the green locking tabs and pins.

Repair of BMW i3 / i8 Electric High Voltage Battery Inverter ...
Repair of BMW i3 / i8 Electric High Voltage Battery Inverter ... Image via www.youtube.com

The connector is designed with safety interlocks preventing improper mating. On that note, thanks for watching and I'll see you in the next one. Posted in BMW i3 Tagged bmw i3, bmw i3 12 v battery, bmw i3 auction, bmw i3 battery fix, bmw i3 high voltage disconnect, bmw i3 high voltage problem, bmw i3 no life, bmw i3 rex, bmw i3 troubleshooting, fixed bmw i3, serious crash detected Leave a reply.

BMW i3 High voltage battery unit training 2022-06-24 19:37:17 - YouTube
BMW i3 High voltage battery unit training 2022-06-24 19:37:17 - YouTube Image via www.youtube.com

Got I3 2014 From Copart. When press Start, panel is on but vehicle doesn't start. Have message: Drivetrain.

BMW i3 i8 740/745e EME repairs
BMW i3 i8 740/745e EME repairs Image via www.remmington.info

Stop carefully and switch off engine. Is not possible to continue journey. Call BMW After diagnostic have mistakes: 8040BD - Terminal 30F reset or deactivated.

not present 21F13D - High - voltage battery, switch contactors: Switch. In this video, we'll show you how to safely disconnect the 12-volt battery on a 2014-2021 BMW i3. This guide features a 2016 BMW i3 with a Range Extender (REx) engine.

Home / BMW i I01 i3 Hatchback / Repair Manuals and Technical Data / 61 General vehicle electrical system / 61 21 Battery with holder /. I've ordered a crystal shift lever kit for my 2024 i4 M50 and intend to do the installation myself. In preparation for this I want to make sure I do every step of the procedure correctly, especially when it comes to powering down the car and disconnecting the High voltage (HV) system and 12 volt-battery.

I've read through multiple threads on people doing mods that require HV.

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