2015 BMW 535i All Keys Lost Cas4+ ACDP

Summary

The presenter demonstrates an all-keys-lost procedure for a 2015 BMW 535i with a CAS4+ immobilizer, using a Mini ACDP.

Main steps and technical details

• The car’s battery was very low, so the presenter accessed the trunk and disconnected it before working. They also found wiring left from a previous GPS installation.
• The presenter used the last seven characters of the VIN on RealOEM to identify the engine as an N55, then connected the ACDP to the DME in BMW F-body N55 bench mode. They identified the DME and saved or exported its data.
• They located and removed the CAS4 module, identified the chip as 1N35H, and selected the corresponding CAS4 immobilizer-reading procedure in the ACDP app.
• Using the appropriate adapter and BDM test points, they read and decrypted the CAS data, then saved the vehicle information.
• For key generation, they selected a 315 MHz key and an available key position—slot 5, which was blank—and used the previously saved data. The presenter also chose the app’s “write add data” option. The app’s instructions mention synchronizing the key at the vehicle’s emergency induction coil.
• After reassembling the vehicle, the presenter used a jump source to address the low battery. The new key successfully operated the locks and started the car. They also demonstrated that it worked without holding it beside the induction coil.

Guide focus

This hands-on guide covers DME identification and data capture, CAS4+ removal and chip identification, ACDP/BDM connections, key generation, and in-vehicle key synchronization. The presenter emphasizes checking the chip type and maintaining good contact at the test points.

Main speaker/source: The video’s presenter, a locksmith documenting the procedure.