Why the M340i badge only gets us so far
Two cars registered in the same year can have different ECU hardware or software. A dealer update, a replacement control unit or previous tuning can also affect the route available. If you have an ECU identification report from a garage or paperwork from a previous tune, share it with your enquiry.
We may need to confirm the details on the vehicle before booking. Our BMW ECU unlock guide explains the differences between access through the diagnostic socket, bench work and a supplier unlock.
What an unlock can mean for your visit
If the ECU needs separate work before we can fit the tune, ask whether it can be handled in a single appointment or needs another step. Supplier work can affect turnaround, and additional access or removal work can affect the total. We’ll explain the available route and quote before confirming the job. See what can change a Stage 1 quote.
If a dealer update is planned, tell us before the tuning visit. Ask the dealer what the update covers and keep a copy of the job sheet. See what an ECU software update can mean for a remap.
What to include in your enquiry
Send the registration, model year, fitting postcode and any known ECU replacement, update or previous tune. Mention hardware changes and whether there’s a date you need the car back. We’ll confirm compatibility and discuss the next step.