Forge Replacement Atmospheric Valve for BMW N20 2.0 Turbo
Upgrade the weak factory diverter valve on your BMW N20 2.0 turbo with this Forge atmospheric blow off valve. Designed for the electronically controlled bypass system used on N20 engines, this direct replacement dump valve delivers long‑term reliability, consistent boost, and that desirable atmospheric vent sound while keeping full OEM ECU control of valve actuation.
Why upgrade the BMW N20 diverter valve
The original rubber diaphragm in the stock bypass valve is known to split, especially on cars with an ECU software upgrade or those used in warmer climates. When it fails you can lose boost pressure and performance, and it may not trigger a check engine light, so you might not realise you are down on power. This Forge piston‑based solution removes the diaphragm entirely, helping to prevent boost leaks and restore reliable turbo performance.
Key features
- Piston‑based atmospheric valve with no diaphragm to fail
- All aluminium construction for strength and heat resistance
- Direct replacement for the electronically controlled bypass valve on N20 2.0 turbo engines
- Retains OEM ECU control over valve actuation
- Ideal for ECU remap, Stage 1 or Stage 2 tuned cars, and a robust upgrade for stock vehicles
- Helps prevent boost loss and inconsistent performance caused by OEM valve failure
- Gives a crisp atmospheric vent to air sound
Vehicle compatibility
For BMW models with the N20 2.0 turbo engine and electronically controlled bypass valve in the following F‑series chassis:
- F20: 125i, 120i, 220i, 225i
- F22/F23: 220i, 228i
- F30/F31/F34: 320i, 328i
- F10/F11: 520i, 528i
Important: does not fit B38, B48, or B58 engines.
Real‑world proven
We have installed and used this Forge atmospheric valve on N20 cars and the results speak for themselves. Strong boost holding, reliable operation, and happy customers who wanted a dependable fix for the factory valve issues along with a sportier turbo sound.
Fitting and support
Professional fitting available at Nforcd in Warwickshire. For a quotation and booking, email Sales@nforcd.com. Our team can advise on suitability for your exact model and software setup.
Search terms and keywords
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