Instructions to replace a REx yourself?

james0157 · Monday at 4:06 PM

Hi there, I have a BMW i3 with a non functioning REx, diagnosed. I'm on a great big budget, I have tools including the ability to raise the car up myself, and I have access to a nice dry workshop. What I'm looking for are instructions. I've managed to isolate the HV battery, get to the REx after removing the rear bumper, exhaust and airbox, however I'd like to know how to get to all the bolts needed to remove the REx and lower it down and out of the vehicle. Tragically there appears to be no Haynes manual for the i3 REx nor can i find a step by step guide unless anyone knows of one?

Thanks in advance!

EvanstonI3 · Monday at 4:29 PM

There is a guy in the USA who recently replaced his REX by himself and posted about it in a BMW i3 USA group (it is only for USA-market i3). He seems willing to help others who want to do the same thing. Since you seem to have FB access from another post, this is his PROFILE: https://www.facebook.com/tom.otto.2024/ I would suggest try Messaging him and see what he says. I have no idea if he is in this Forum because no one posts under their Real Name and I don't recall seeing him post this info here.

james0157 · Wednesday at 12:39 PM

EvanstonI3 said:
There is a guy in the USA who recently replaced his REX by himself and posted about it in a BMW i3 USA group (it is only for USA-market i3). He seems willing to help others who want to do the same thing. Since you seem to have FB access from another post, this is his PROFILE: https://www.facebook.com/tom.otto.2024/ I would suggest try Messaging him and see what he says. I have no idea if he is in this Forum because no one posts under their Real Name and I don't recall seeing him post this info here.

Thank you very much for your suggestion, he's provided a wealth of resources and advice. Midway through doing it now and feeling so much more confident!

3rigel · 2024-12-20T09:32:08-0600

I've just removed a rex engine from a car I'm breaking, front end damage. I removed the Rex and electric motor together. If you want some tips, remove the drive shafts early doors and the HV cable that runs down the UK Passanger side near the motor when you can. It may seem a small cable in the grand scheme of things but when things are this tight every inch counts. If you have a couple of ramps getting the back end on those will help give clearance later on too. Best of luck!

kd7iwp · 2024-12-20T12:23:48-0600

3rigel said:
I've just removed a rex engine from a car I'm breaking, front end damage. I removed the Rex and electric motor together. If you want some tips, remove the drive shafts early doors and the HV cable that runs down the UK Passanger side near the motor when you can. It may seem a small cable in the grand scheme of things but when things are this tight every inch counts. If you have a couple of ramps getting the back end on those will help give clearance later on too. Best of luck!

Can you explain to me what "early doors" are?