Genuine BMW 61351378717 E32 E34 Trailer Towing Module – NOS

Genuine BMW New Old Stock 12-volt trailer towing module for selected BMW E32 and E34 models equipped with the original trailer-coupling electrical system.

This module forms part of the factory towbar wiring system and controls the electrical circuits for the trailer’s rear lighting. The original German markings identify connections for the rear fog lamp, brake lamps and tail lamps.

The module is marked “Made in W-Germany” and is supplied with its original Genuine BMW packaging.

Product details

• Product: Trailer towing module
• Alternative description: Trailer lighting control module
• Alternative description: Towbar electrical relay module
• German description: Anhängermodul
• Manufacturer: Genuine BMW
• BMW part number: 61351378717
• Formatted BMW number: 61 35 1 378 717
• Short reference number: 1378717
• Voltage: 12V
• Application: Original trailer-coupling electrical system
• Manufacturing marking: Made in W-Germany
• Condition: New Old Stock
• Quantity supplied: One module

Function

This module is used in the original BMW trailer-coupling wiring system and manages the relevant trailer rear-light circuits.

The original housing markings include:

• Nebell. – Rear fog lamp
• Bremsl. – Brake lamp
• Rücklicht – Tail lamp
• li – Left
• re – Right

The module must be connected to the correct original BMW wiring harness and compatible trailer socket arrangement.

Vehicle compatibility

BMW catalogue information associates part number 61351378717 with selected vehicles equipped with the factory or original BMW trailer-coupling wiring system:

BMW 5 Series E34

• Selected E34 Saloon models
• Selected E34 Touring models
• Only vehicles using the corresponding trailer-module and wiring version

BMW 7 Series E32

• Selected E32 models
• Selected short- and long-wheelbase versions
• Only vehicles using the corresponding trailer-module and wiring version

Compatibility depends on the model, production date, market specification, trailer-coupling equipment and installed wiring harness.

This module is primarily associated with earlier E32 and E34 electrical systems. Always compare the BMW part number, connector arrangement and electrical connections with the original module before ordering.

BMW and reference numbers

• 61351378717 – Original BMW trailer towing module
• 61 35 1 378 717 – Formatted BMW catalogue number
• 1378717 – Short BMW reference number
• 61351390351 – Later BMW trailer-module reference
• 61 35 1 390 351 – Formatted later reference number

BMW introduced the later 61351390351 module from approximately September 1988. BMW catalogue information notes that the later module is not automatically retrospectively interchangeable with 61351378717.

Do not order solely according to the vehicle model. The number and connections on the original module must be checked.

Condition

This is a genuine BMW New Old Stock component that has never been installed.

Due to its age and long-term storage, the following may be present:

• Light dust and storage marks
• Minor cosmetic marks on the plastic housing
• Age-related surface discolouration
• Wear, staining and deformation to the original cardboard packaging

The module has not been electrically function-tested. The housing, electrical contacts and internal operation should be checked before installation.

The original printed markings remain clearly visible.

Included

• One genuine BMW trailer towing module
• Original Genuine BMW cardboard packaging
• Supplied exactly as shown in the photographs

The towbar, trailer socket, wiring harness, connectors, mounting hardware and other electrical components are not included.

Installation recommendation

Before installation:

• Confirm BMW part number 61351378717 against the original module
• Compare all electrical connections and connector positions
• Inspect the vehicle wiring harness for corrosion or previous modifications
• Check the module housing and contacts for storage-related deterioration
• Disconnect the vehicle battery before electrical work
• Install the module securely in the correct factory position
• Do not substitute the later module without confirming electrical compatibility
• Test the trailer tail lamps, brake lamps, indicators and rear fog lamp after installation
• Check that the vehicle’s own rear lighting continues to operate correctly

Installation should preferably be performed by an automotive electrician familiar with classic BMW E32 and E34 trailer wiring systems.

Storage location: 202