Forge BMW N55 Blow Off Valve Kit for Electronic Wastegate Models
Upgrade your BMW N55 with the Forge Motorsport blow off valve kit, part number FMDVF22A. This premium piston-based dump valve, also known as a diverter valve or DV, is engineered for BMW F-series N55 engines with the electronic wastegate. It is a direct replacement for the OEM plastic bypass valve that is known to deteriorate, leak boost and trigger a check engine light. The Forge BOV delivers reliable boost control, sharper throttle response and peace of mind on both stock and tuned cars.
Compatible with BMW M2, M135i, M235i, 335i and 435i models equipped with the single electronically controlled bypass valve, this kit keeps OEM ECU control via a plug and play electrical harness. It is the trusted N55 dump valve upgrade for daily-driven cars and performance builds, including Stage 1 and Stage 2 ECU remaps.
Why choose this Forge N55 dump valve upgrade
- Piston design with no diaphragm to fail for significantly improved reliability
- All aluminium construction, fully serviceable for long-term durability
- Plug and play electrical harness retains OEM ECU control of valve actuation
- Spring can be changed to suit increased boost levels on tuned engines
- Direct replacement for the OEM bypass valve that commonly becomes brittle and leaks
- Helps prevent boost loss, protects the turbo from debris if the OEM plastic valve fails
- Suitable for stock and remapped cars seeking consistent, dependable boost management
Finish: Black only
Real-world results from Nforcd
We have fitted this Forge BMW N55 blow off valve kit for customers across multiple F-series platforms and on our own cars. Feedback has been consistently positive, with owners praising the improved boost integrity, drivability and long-term reliability versus the factory valve.
Compatibility - BMW N55 with Electronic Wastegate (July 2013 onward)
- BMW F20 F21 M135i July 2013+ Electronic Wastegate
- BMW F22 F23 M235i July 2013+ Electronic Wastegate
- BMW F30 F31 F34 335i July 2013+ Electronic Wastegate
- BMW F32 F33 F36 435i July 2013+ Electronic Wastegate
- BMW F87 M2 2014+ Electronic Wastegate
Note for F87 M2 2015 to 2018 non-Competition: an additional loom is required. Modification required on the F87 M2.
Fitment and installation
Installation is straightforward thanks to the plug and play harness that integrates with the BMW wiring. For professional fitting, we recommend booking with Nforcd in Warwickshire. Request a quote at Sales@nforcd.com.
Download the official Forge fitting instructions
Compatibility check before dispatch
We will verify fitment before shipping. Provide your UK registration or the last 7 digits of your VIN at checkout and we will confirm that FMDVF22A suits your vehicle.
Key search terms
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Part number
FMDVF22A
Manufacturer and warranty
Manufactured by: Forge
Warranty: Forge Limited Lifetime Warranty, non-transferable