Dorman 940-157 Trunk Lock Actuator Motor

BMW Trunk Lock Actuator Replacement

Dorman 940-157 is a trunk lock actuator motor built to match the fit and function of the original equipment unit. It restores proper trunk latch operation and plugs into the factory wiring for a direct replacement on select BMW 5 Series applications, including BMW 528i, BMW 535i, and BMW M5 models.

• Direct replacement trunk lock actuator motor for OE-style fit and function
• Electrical activation with a rectangular female connector
• Plugs into factory wiring for straightforward integration
• Plastic housing and attached lead wires for trunk latch service
• Compatible with select 2011-2016 BMW 528i, 535i, 550i, ActiveHybrid 5, and M5 applications
• Cross-references BMW part numbers 51244447850 and 51247273752 for the same application

Detailed Product Overview

This Dorman trunk lock actuator motor is engineered as a direct-fit replacement for the original trunk latch actuator used on select BMW 528i, 528i xDrive, 535d, 535d xDrive, 535i, 535i xDrive, 550i, 550i xDrive, ActiveHybrid 5, and M5 vehicles. The unit uses an electrical activation design, a rectangular connector shape, and a female terminal configuration to match factory-style integration. Dorman 940-157 is intended to restore trunk latch function when the original actuator motor no longer responds correctly.

Built with a plastic housing and supplied with attached lead wires, this actuator is made to plug into the vehicle’s existing wiring without requiring modification to the factory harness. For buyers searching for a BMW trunk lock actuator motor, trunk latch actuator replacement, or Dorman 940-157 for BMW 5 Series fitment, this part provides a direct OE-style service solution.

Common Problems This Part Can Address

• Trunk latch does not release when the switch or remote is used
• Intermittent or slow trunk lock response
• Trunk lid remains locked after electrical command
• Faulty actuator motor causing inconsistent latch operation
• Need for an OE-style replacement on BMW trunk lock systems

Installation Notes and Tips

Install the actuator in the trunk lid or compartment latch assembly according to the vehicle service procedure. Verify connector shape, terminal type, and wiring harness routing before installation. Because this part plugs into factory wiring, confirm the original actuator diagnosis before replacement and inspect the latch mechanism for binding or damage that could affect operation.

Quality Assurance

Dorman 940-157 is built as a direct replacement part that matches original equipment fit and function for the listed BMW applications. It is designed to restore proper trunk latch operation using factory-style electrical connection points and OE-matched service dimensions.