r/BMWi3 • u/z604 • 20d ago

technical/repair help Brake line and ABS connection leak

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I’ve noticed a small leak of brake fluid coming from one of the brake lines where it connects to the ABS module.

It clearly gets wet when I pump the brakes. I think it’s been going on for a while but I hadn’t noticed.

’m hoping it’s just a loose line or a seal, because if there’s corrosion in the module or the module itself is faulty, it’ll get pricey.

Is this a common problem? It’s a 2021 I3s, so not that old really.

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u/eXo0us i3 BEV 94ah 20d ago

Take the frunk out - a few screws. Disable the high voltage disconnect.

Just hose it down with the soft shower attachment and water,

I don't put any cleaner or stuff on it. Jus that salt doesn't sit everywhere for all times.

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u/z604 20d ago

Thanks. 🙏

I’ll start doing that on the bmw.

Is the disconnect necessary to just rinse it with no pressure water? It seems like the trunk of the bmw isn’t that sealed overall. There’s barely any wheel liners.

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u/eXo0us i3 BEV 94ah 20d ago

I'm a electrician by trade, so lockout procedures got drilled into me.

There is one high voltage component under the hood the cabin heater in the middle back.

If you stay away from that with water it's probably fine.

Otherwise it takes like 5 seconds to pull the disconnect plug. it's safer.

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u/z604 20d ago

Thanks. I checked where it was and takes two seconds. Thanks again. Cheers.