This Erich Jaeger towbar wiring kit hooks your BMW into a trailer so the lights match every press of the pedal. The harness is cut for BMW 1, 2, 3 and 4 Series plus Alpina variants in the date ranges listed, so plug locations line up without guesswork behind the trim. The control module reads the CAN bus and passes clean signals to the trailer socket, handy when you tow on wet city streets or dusty back roads. The loom uses multi-core cable with thick insulation that handles heat near the exhaust and the usual shake from coarse-chip bitumen. The plastic housings around the module and socket are sized for rear bumper cavities on these BMW platforms, so nothing dangles under the car to catch road grime. That smart setup means less exposed copper, fewer dodgy joins and wiring that can keep doing its job trip after trip.

• Genuine Erich Jaeger vehicle-specific towbar wiring kit
• Suits selected BMW 1, 2, 3 and 4 Series models
• Also suits Alpina B3 and B4 within listed years
• Includes JaegerCANtrol control module for trailer lights
• Harness lengths tailored to BMW F20, F21, F22 and F23 platforms
• Colour-coded multi-core cable for clear circuit identification
• Connectors match OEM plug locations behind rear trim
• Printed installation instructions supplied with model diagrams
• Designed for integration with standard 12 V trailer socket
• Ideal for regular towing use on sealed and graded roads

Q: Does this kit include a control module?

Yes, the kit includes a dedicated control module. The module interfaces with the BMW CAN bus so the trailer lights follow the car signals. It sits in the rear of the vehicle near the loom. This means the trailer indicators and brakes work with the vehicle switches. It also keeps the wiring layout tidy and contained.

Q: Is this harness vehicle-specific or universal?

This harness is vehicle-specific. The instructions list BMW F20, F21, F22 and F23 platforms plus the BMW and Alpina variants in the dates shown. Connector shapes and cable lengths are set up for these bodies. This reduces cutting and splicing of wires. It also helps the loom sit correctly behind trims.

Q: Does the kit come with installation instructions?

Yes, printed installation instructions are included. The sheet shows model codes like F20 and F22 with simple diagrams. Connector locations are marked so you know where to tap into the existing loom. Having the diagrams on hand helps plan panel removal. It also makes it easier for an auto electrician to follow the steps.

Q: What trailer socket type can this wiring support?

The harness is suitable for a standard 7‑pole style socket. The wiring bundle leads towards the towbar socket location at the rear. Each core can be matched to the common 7‑pole pin layout used on light trailers. This keeps brake, tail and indicator circuits separate. It gives a familiar setup for most Australian box and small camper trailers.

• Suits selected BMW 1 Series F20 5-door from 03/2014 on
• Suits selected BMW 1 Series F21 3-door from 03/2014 on
• Suits selected BMW 2 Series F22 Coupe from 03/2014 on
• Suits selected BMW 2 Series F23 Cabrio from 03/2014 on
• Suits BMW Bmw Alpina B4 from 01/2016 to 01/2018
• Suits BMW Bmw Alpina B3 from 01/2016 to 01/2018
• Suits BMW 4 Series from 01/2013 on
• Suits BMW 3 Series from 01/2012 on
• Suits BMW ActiveHybrid 3 from 01/2012 to 01/2016
• Suits BMW 2 Series from 01/2014 on
• Suits BMW 1 Series from 11/2010 on
• Suits BMW M140i from 01/2016 to 01/2018