On a BMW, the engine computer may be described as a DME, ECU or ECM. Before ordering, ask your installer to identify the engine computer and the vehicle’s immobilizer system. Use the full BMW and supplier part numbers, engine and module version to narrow the selection. Confirm the match with your installer, even if the connector or model year looks right.
Choose the format your installer needs
- DME only. Ask whether the installer can adapt the replacement to your existing immobilizer. If the original module is readable, ask whether its data can be transferred for your exact application.
- Matched set. A listing may include the DME, CAS and a key from the same donor. Check the listed and photographed contents. Some sets include additional modules. Ask whether the receiving vehicle needs any further coding or adaptation.
- DME and key. Check whether the listing includes a CAS module and whether the key is matched. Ask the installer to confirm the adaptation path before ordering.
Start with BMW control modules. The BMW X5 E70 7586909 set lists the DME, CAS3, Valvetronic controller and key separately. Compare each number and the listed contents with what your installer needs.