BMW GPF OPF Delete: What It Is, How It Works, and What You Need to Know
What Is a BMW GPF / OPF?
GPF (Gasoline Particulate Filter), also called OPF (Otto Particulate Filter) in European markets, is a catalytic device in BMW exhaust systems designed to capture soot particles from gasoline direct-injection engines. BMW began fitting GPF to most turbocharged engines from 2018 onwards to meet Euro 6d emissions standards.
Which BMW Engines Have GPF?
| Engine | Models | Years |
|---|---|---|
| B58 (all variants) | 340i, 440i, 540i, M340i, M440i, X3/X4/X5 40i, Z4 M40i, Supra | 2018+ |
| S58 | G80 M3, G82 M4, G87 M2, F97 X3M, F98 X4M | 2020+ |
| S55 (late production) | F80 M3, F82 M4, F87 M2 Comp (EU spec) | 2018-2021 |
| B48 | 320i, 330i, 420i, X1/X3 20i | 2018+ |
| S63 (G-Series) | F90 M5, X5M, X6M | 2018+ |
What Does GPF Delete Coding Do?
GPF delete coding modifies the DME (engine management) software to:
- Disable GPF monitoring — the DME stops checking GPF status sensors
- Disable regeneration cycles — eliminates forced regen that causes hesitation
- Prevent fault codes — no check-engine lights related to GPF sensors
- Remove exhaust backpressure logic — allows free-flowing exhaust
When Do You Need GPF Delete Coding?
GPF delete coding is needed after physically removing or replacing the GPF with a test pipe or catless downpipe. Without the coding, the DME will detect the missing filter and trigger fault codes, limp mode, or forced regeneration attempts.
How Does the Remote Coding Process Work?
- Order and provide your VIN for compatibility verification
- Connect your laptop to the OBD port via ENET cable
- Join a remote session — the technician modifies DME parameters (30-45 minutes)
- Clear fault codes and verify operation
Price: $449 USD at M-TRI UPGRADE.
Important Disclaimer
GPF/OPF delete coding is intended for off-road, track, and competition use only. Removing emissions equipment may violate local regulations. Please verify your local laws before ordering this service.
FAQ
Will GPF delete void my BMW warranty?
Yes, BMW may deny warranty claims related to the exhaust and emissions system. The coding is reversible if needed before a dealer visit.
Do I need to remove the physical GPF first?
The coding is designed to be applied after physical GPF removal. It can be applied without removal, but the primary benefit (eliminating regeneration and backpressure) requires the physical filter to be replaced.
Can I run a catted downpipe instead of catless?
Yes. A high-flow catted downpipe with the GPF removed is a popular option. The GPF delete coding prevents fault codes regardless of whether you run catted or catless.
Related Products
- BMW GPF/OPF Delete Coding — $449
- BMW Stage 1 ECU Tune — from $749
- Exhaust Valve Controller Module — $459