Problem:

When a BMW 3 Series (i.e.F35) trunk fails to open, the issue is often caused by data corruption in the MPC5515 CPU of the REM (Rear Electronic Module).

Solution:

The REM module can be repaired by reading the CPU data, modifying and writing the modified data.

Compatible Tools:

Xhorse VVDI Prog

Xhorse Multi Prog

REM module repair guide:

Wiring diagram:

REM=Rear Electronic Control Module

CPU: MPC5515

CPU ID: 1D6011181D10D107

*Must add a 100-120Ω resistor between VCC and JCOM

Software Configuration:

• In VVDI Prog:

Select: Microcontroller → Motorola MPC55 series → MPC5515

In Multi Prog:

Select: BMW-> BMW REM (MPC5515)

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