BMW DME & ECU Repair Service — Mail-In
Component-level repair for BMW and MINI DME, DDE, EGS, CAS, and FRM modules. 3 Series, 5 Series, X5, X3, M-Series, and all BMW platforms. 48–72 hour turnaround. 12-month warranty.
Common BMW Module Failures We Fix
- ✓ DME (Digital Motor Electronics) internal faults — no-start, misfires, communication loss
- ✓ DDE (Digital Diesel Electronics) faults on diesel BMW platforms
- ✓ CAS (Car Access System) — key not recognized, immobilizer active, EWS faults
- ✓ FRM (Footwell Module) faults — lighting, windows, mirror controls
- ✓ EGS (Electronic Transmission Control) faults, limp mode on ZF 6HP / 8HP
- ✓ Water intrusion damage to DME (common on E-chassis under battery tray)
- ✓ Post-repair ISN coding and key synchronization
- Full diagnostic assessment
- Component-level board repair
- ISN coding & key sync
- 12-month warranty
- Free return shipping (Ground)
Response within 2 business hours
BMW Platforms & Modules We Service
3 Series (E46 / E90 / F30 / G20)
DME for N46, N52, N54, N55, B48, B58. CAS / EWS immobilizer programming. FRM footwell module repair.
5 Series (E60 / F10 / G30)
DME for N52, N54, N55, B48, B58. EGS for ZF 6HP and 8HP. CAS module faults common on E60.
X3 / X5 / X7
DME and DDE repair for petrol and diesel variants. EGS 8HP limp-mode faults. Water damage to DME common on X5 E70.
M Series (M3 / M4 / M5 / M6)
DME repair for S54, S55, S58, S65, S85 engines. Performance-spec component repair and ISN coding.
7 Series / 8 Series
DME, EGS, and CAS module repair for all E65, F01, G11 platforms. Complex multi-module faults diagnosed accurately.
MINI Cooper / Countryman
DME repair for N12, N14, N16, N18, B38 engines. CAS and EWS immobilizer faults on R and F-series MINI.
BMW DME Repair FAQ
What is a BMW DME and how does it differ from a regular ECU?
BMW calls their engine control unit the DME (Digital Motor Electronics) for petrol engines, or DDE (Digital Diesel Electronics) for diesel. It functions identically to an ECU — managing fuel injection, ignition, boost, and emissions — but BMW’s implementation is tightly integrated with the CAS (Car Access System) immobilizer via a unique ISN (Individual Serial Number) code. Both modules must be matched, which is why BMW immobilizer and DME work requires specific expertise.
What is the CAS module and can you repair it?
The CAS (Car Access System) manages key recognition, immobilizer authorization, and start permission on E-series and F-series BMWs. When it fails — or loses sync with the DME — the car won’t start even with a valid key. We repair CAS modules and perform ISN coding to re-sync the CAS with your DME. We have the specialized tools and expertise to perform this work correctly.
Can you fix BMW FRM (Footwell Module) failures?
Yes. FRM module failure — causing headlights, interior lights, windows, and mirror controls to stop working — is one of the most common BMW electrical faults we see, especially on E90/E92 3 Series and E60 5 Series. We repair the FRM board at the component level for a fraction of BMW dealer replacement cost.
Do you repair water-damaged BMW DMEs?
Yes. Water intrusion under the battery tray is a well-known failure mode on E60 5 Series and E70 X5 models. We inspect and repair the DME board, replace corroded components, and bench-test before shipping back.
How long does BMW DME repair take?
Most repairs complete in 48–72 business hours from receipt. Rush 24-hour service is available for an additional Get a Quote.
Ready to Fix Your BMW?
DME repair. CAS & ISN coding. FRM repair. 48–72 hours. 12-month warranty.
Ship Your BMW Module →Our Equipment
Professional-Grade BMW Key & DME Repair
We read BMW ISN codes directly from the DME/DDE without removing the MCU chip — no soldering, no dealer diagnostic station required. This lets us repair BMW engine computers at a fraction of dealer cost, with the same programming accuracy.
- CAS1 / CAS2 / CAS3 / CAS3+ / CAS4 / CAS4+ key modules
- DME / DDE ISN read & write — non-destructive
- EWS 3.3 / EWS 4 anti-theft module repair
- FRM footwell module programming
- All BMW families: E, F, G series and MINI
BMW Service Pricing
All services available mail-in. Ship your module to our Houston facility.
Get a Free Quote — Ship Your Module Today
Tell us your vehicle, module type, and what symptoms you are experiencing. We respond within 2 business hours with a diagnosis and repair quote.