Aftermarket parking sensors

Find out more about the BMW 1 Series F20, F21, F22 & F23
Manufactured from end of 2011

Moderators: Rich196, babybmwadmin, marco_polo, Producethis, Lambster

Post Reply
Junior Member
Junior Member
Posts: 1
Joined: Sat Mar 17, 2018 9:35 am

Aftermarket parking sensors

Post by Stephen25uk » Sat Mar 17, 2018 9:39 am

Morning folks, I’m going to install a set of aftermarket parking sensors in the rear of my my 1 series, 2015 f21 , lci I’ve found a suitable cable entry point behind the rear bumper into the boot area and up behind the passenger side rear light area.
Can anyone tell me where I can find the plug that connects into the rear light or the cable I need to tap into for the reversing light for the life of me I can’t find it, I’ve got a good earth point no problem, Just can’t find the reversing cable wire for power to tap into.
Any help greatly appreciated

Knowledgeable Member
Knowledgeable Member
Posts: 74
Joined: Sun Oct 16, 2016 11:40 pm

Re: Aftermarket parking sensors

Post by BFleming » Mon Mar 19, 2018 9:56 am

I did this on a F20 (pre-LCI) and I used the reverse light wire was on the RHS of the boot. Remove the carpet & you'll see the rear wiring loom. I think the LCI has reverse lights in the outer light units, so not much difference pre-and-post LCI.
You can trace all the lights back to the Rear Electronic Module (REM). This is your wiring diagram: ... 1VnYSbVVSC (I chose a LCI F21 118d arbitrarily).
Essentially you have a blue & green wire coming from each reverse light to the REM, to the pins shown. I could visually trace my wire from the light unit to the REM once the boot side trim was removed.
In anticipation of someone chiming in saying you'll get a blown bulb warning by tapping into one of these wires, it depends on your reverse sensor kit. I used a Cobra kit that needed a 12V supply and a reverse light supply. The idea is that it gets its main power from the 12V, and draws next to nothing from the reverse light supply. I get no bulb warnings.
2013 BMW F20 114i SE
2013 BMW F11 525d SE
2000 Porsche 986 Boxster 2.7
1983 Porsche 944

Post Reply

Return to “F20, F21, F22, F23 (2011 - tbd)”