From 23 December 2026, carmakers selling in the EU must give independent workshops the means to do jobs that today often need a franchised dealer: pairing a replacement part to the car, changing its variant coding and reprogramming its control units. The obligation comes from Commission Delegated Regulation (EU) 2026/699, adopted on 23 March 2026, which tightens the type-approval rules on access to repair and maintenance information. Czech site Auto-mania flagged the deadline on 13 November.
For a Tesla owner, the part that matters most is pairing. Some electronic parts do not work after they are fitted until the manufacturer's software has matched them to the car. That ties repairs to the brand's own service network or its own diagnostic software.
What changes on 23 December
Under the regulation's new point 6.4a, carmakers must give independent diagnostic-tool makers either software or web-service interfaces, or the information and processes, to:
- pair an original replacement part to a vehicle, including compatible remanufactured or re-used parts and parts the carmaker has authorised;
- carry out variant coding;
- reprogram control units with the vehicle's original software, following the carmaker's instructions.
The rule covers vehicle types first type-approved after 1 September 2020. Reprogramming, coding and part activation must work with non-proprietary hardware built to open standards such as ISO 22900-2 or SAE J2534, without depending on the carmaker's own hardware.
The regulation also widens the information carmakers must publish. It now includes what independent repairers need to diagnose and repair traction batteries, down to individual modules, and to calibrate driver-assistance systems.
The dates are staggered
| Obligation | Applies from |
|---|---|
| Interfaces or information for pairing, coding and reprogramming (types first approved after 1 September 2020) | 23 December 2026 |
| The same for types first approved between 1 September 2020 and 6 July 2022 | 23 June 2027 |
| API access for independent repairers to update a car's electronic maintenance history | 23 June 2027 |
| Any of these operations that involves a software update | 23 June 2028 |
Carmakers keep security controls
The rule does not give garages unchecked access. Carmakers may require the diagnostic tool and the independent repairer to be authenticated, keep records of each access and, in specific cases, require a connection to their own server. Information on which repairer accessed a car must be pseudonymised. Before a used part is moved from one car to another, the carmaker's process may ask for the part's serial number, the vehicle identification number and the owner's agreement.
What it means for Tesla owners
Tesla has not said which of its European models fall under which date. That depends on when each vehicle type was first approved, and the staggered table above shows how much that matters.
The rule also does not promise cheaper repairs. Carmakers may still charge "reasonable and proportionate" fees for validating independent tools and for the information and hardware they supply. What it changes is who can do the work. Once the dates apply, an independent garage should be able to fit and activate a replacement or re-used part on a covered car without sending the owner back to the brand's own network.