Forge Motorsport BMW N20 2.0 Turbo Atmospheric Blow Off Valve (BOV) Dump/Diverter Valve Upgrade F20 F30 F10 125i 220i 225i 228i 320i 328i 520i 528i

Forge Motorsport VTA Turbo Pressure Relief Valve for BMW N20 2.0 Turbocharged Engines

Give your N20-powered BMW sharper boost response, a clean whoosh on lift-off and rock-solid reliability with this Forge Motorsport vent-to-atmosphere turbo valve. Designed to replace the factory electronic bypass unit on the BMW 2.0 petrol turbo, it suits F20, F30 and F10 platforms including 125i, 220i, 225i, 228i, 320i, 328i, 520i and 528i.

This precision-engineered aluminium piston valve eliminates the fragile rubber diaphragm found in the stock compressor bypass. If your original membrane has split or weakened, you can lose charge pressure and performance without triggering a warning light. The Forge solution cures that weak point, helps prevent boost leaks and keeps your turbocharger holding command of target pressure, especially on remapped cars and in hotter climates.

Key reasons to choose this upgrade

• Piston-operated internals with no rubber diaphragm to perish or tear
• All aluminium body for durability, heat resistance and consistent actuation
• Direct swap for the OE electronically controlled unit with factory ECU control retained
• Vent-to-atmosphere operation for that crisp turbo whoosh enthusiasts love
• Ideal for tuned N20 engines running increased charge pressure from ECU software
• Helps resolve common boost loss caused by the standard valve

Vehicle compatibility

For BMW models fitted with the N20 2.0 turbo petrol engine and electronic bypass valve:

• F20 and F21 1 Series: 125i
• F22 and F23 2 Series: 220i, 225i, 228i
• F30, F31 and F34 3 Series: 320i, 328i
• F10 and F11 5 Series: 520i, 528i

Real-world results

We run this valve on our own N20 cars at MJ Modifications and customer feedback has been excellent. Drivers report stronger boost recovery between shifts, a more consistent feel under load and the signature VTA sound without compromise to drivability.

Fitting and support

Professional installation available at MJ Modifications in Warwickshire. Request a fitting quote via info@mjmodifications.co.uk.

Important notes

• For BMW N20 2.0 turbo engines using the electronically controlled bypass valve
• Not suitable for B38, B48 or B58 engines

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Upgrade your N20 with this proven Forge Motorsport valve for stronger, more reliable boost control and a satisfying turbo soundtrack on every drive.