DPF, EGR, AdBlue and OPF Off (non-road use)
OPF / GPF Off – GPF delete software for non-road vehicles
Software removal of the petrol particulate filter functions (OPF Off, GPF Off, GPF delete) from the petrol engine ECU for vehicles not operated on public roads.
Each request is submitted with the declared vehicle use and the country of use and is reviewed before acceptance. Requests for road vehicles are declined.
Requests are submitted from a DR-files account. If you are not signed in, you will be asked to sign in or register first. The selected service is kept.
Service details
The modification disables regeneration, differential pressure and filter temperature monitoring and the related fault codes; the filter has to be physically removed. On modified cars it is usually handled together with Stage 1 or Stage 2.
If the vehicle is in road use and the emission system reports faults, the lawful options are a repair of the affected components, a check of the current calibration (File Review) or a return to the original software (Original Files).
Required information
- Vehicle, engine and ECU identification with hardware and software number (if known)
- Complete original file read from the control unit
- Declared vehicle use (motorsport, off-road, export) and country of use
- Description of the vehicle, its use and the technical situation
Typical workflow
- 01Provide the vehicle, control unit and application details.
- 02Submit the request for manual review.
- 03After approval you receive a quote. Submission does not guarantee acceptance.
- 04Processing starts once you accept the price and the credits are charged.
Technical notes
- Emission-related functions are linked; related monitoring and fault codes are assessed as part of the review.
- The price in credits is confirmed in the request after review. Nothing is charged before you accept it.
- The modification makes the vehicle technically unfit for operation on public roads (in the Czech Republic § 37 of Act No. 56/2001 Sb.). With the request you sign a declaration on the use of the vehicle and receive our written notice by e-mail.
Frequently asked questions
Do you provide OPF OFF or GPF OFF for road vehicles?
No. OPF/GPF-related software is prepared only for vehicles that are not operated on public roads. The declared use is reviewed and requests for road vehicles are declined.
What is needed for the request?
The complete original file, the hardware and software number, the declared vehicle use with the country of use and a description of the application. Requests for vehicles in road use are declined.
Ready to submit your first file?
Create an account and manage your ECU and TCU requests from one place.