The module behind the key: read, backed up, synced
On European cars the key is the easy part. The work is the module that stores the key data. We read it, back it up before touching anything, and sync keys, used modules and replacement units.
- Open 24/7
- European specialist
- Price by text first
- BMW EWS, CAS, FEM and BDC; Mercedes EIS on FBS3 cars; VW and Audi clusters and newer platforms; Volvo CEM; Land Rover KVM.
- Used module installed and the car won't start? We match it to your car where it can be matched.
- Data is backed up before any write. No risky shortcuts.
- Some modules are read on the bench; we return with the module and a finished key.
- We tell you up front when a module can't be matched outside the dealer.
Typical jobs
- BMW all keys lost on CAS3, CAS4, FEM and BDC cars
- Mercedes EIS read for a new key on FBS3 cars, EIS diagnosis when the key won't turn
- VW and Audi instrument cluster swaps that lost the immobilizer
- Volvo CEM read for keys on older and newer platforms
- Land Rover KVM and body module key work
- Used engine computer matched to the car
Why backups first
Writing to a European key module without a backup is how cars end up needing a new module. Our rule: read, save, verify, then write. It takes longer and protects the car.
Before you buy a used module
Some used modules can be matched to your car and some are locked to their first car. Text us the part number and your car first, so you don't buy a part that can't be used.
Questions about this
My BMW won't start after a used CAS was installed. Can you fix it?
Often, yes, by matching the CAS to your car and keys. Send the part details first.
Do you replace Mercedes EIS units?
We diagnose and program them on FBS3 cars. If a replacement is needed, we tell you before any work.
Do you work on the bench?
Yes. Some modules are read off the car, then we return with the module and a finished key.
Get a price for your European key
Year, make and model and what happened. We reply with a price, day or night.
Key Monkey works only on European cars: BMW, Mini, Mercedes-Benz, Audi, Volkswagen, Porsche, Volvo and Land Rover. We come to the car anywhere in Metro Atlanta, 24 hours a day.
keymonkey2026@gmail.com · Key Monkey is operated by Keyhub LLC · Marietta, GA · mobile only