Are you a BMW G20 owner who loves the sound of your car’s exhaust, especially in Sport mode, but wishes it was more consistently present in Comfort mode? Many drivers appreciate the enhanced auditory experience of an open exhaust valve, and thankfully, there’s a straightforward modification you can perform to keep your exhaust valve open at all times. This guide will walk you through the process of achieving a permanently open exhaust valve on your BMW G20, allowing you to enjoy a sportier sound profile in every driving mode.
For those unfamiliar, the BMW G20, like many modern performance vehicles, utilizes an electronically controlled exhaust valve. This valve opens and closes to modulate exhaust noise levels. Typically, in Comfort or Eco modes, the valve remains closed for a quieter, more refined driving experience. Sport mode, and sometimes manual shifting, triggers the valve to open, unleashing a more aggressive and louder exhaust note. However, for enthusiasts who prefer a more consistent and sporty sound, the factory settings can be limiting.
This modification focuses on a simple and reversible method to keep the exhaust valve permanently open by disconnecting the valve’s electrical connector. This effectively mimics the “valve open” state achieved in Sport mode, ensuring a more pronounced exhaust sound across all driving modes, including Comfort and Eco.
Step-by-Step Guide to Disconnecting Your Exhaust Valve
Tools and Preparation:
- No special tools are required for this modification.
- Ensure your vehicle is safely parked and the engine is off and cool before proceeding.
Procedure:
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Start Your Engine and Engage Sport Mode: Begin by starting your BMW G20 engine. Once running, shift into Sport mode. You should be able to hear the exhaust valve open, typically resulting in a slightly deeper and louder exhaust note. This step is crucial as the valve is open in Sport mode and we want to disconnect it in this open position.
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Locate the Exhaust Valve Connector: The exhaust valve connector on the BMW G20 is located on the right side of the vehicle, near the rear exhaust muffler. You’ll need to get down and look underneath the rear of the car on the passenger side.
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Disconnect the Electrical Connector: Once you’ve located the connector, you’ll see a small tab on the plug. This tab is a release mechanism. Press this tab inward towards the connector while gently pulling the plug away from the valve actuator. Do not force it. Pushing the tab correctly will allow the connector to detach easily.
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Secure the Disconnected Connector: After disconnecting the plug, it’s important to secure it to prevent it from dangling and potentially getting damaged or causing noise. Use electrical tape to wrap the now exposed terminals of both the connector and the valve actuator to protect them from dirt and moisture.
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Zip-Tie for Added Security: For extra security, use a zip-tie to fasten the disconnected connector to the nearby valve switch or bracket. This will keep it neatly tucked away and prevent any rattling or further movement.
What to Expect After the Modification
- Consistent Sportier Exhaust Sound: You will immediately notice a louder and more present exhaust note in all driving modes, including Comfort and Eco. The car will sound more aggressive even at lower RPMs.
- Sport Mode Pops and Burbles Retained: Importantly, this modification does not remove the signature pops and burbles in Sport mode. You will still experience the full sporty exhaust character when driving in Sport.
- Slightly Louder in Comfort/Eco: The exhaust will be noticeably louder than stock in Comfort and Eco modes, offering a more engaging driving experience without being overly intrusive.
Important Considerations:
- Reversibility: This modification is completely reversible. Simply reconnect the electrical connector to restore the exhaust valve’s factory functionality.
- No Error Codes: Disconnecting the valve in this manner generally does not trigger any error codes on the BMW G20. However, always be aware that modifications to your vehicle are done at your own risk.
- Legality and Noise Regulations: Be mindful of local noise regulations in your area. While this modification enhances the sound, ensure it remains within legal limits for street driving.
Conclusion
Keeping your BMW G20 exhaust valve permanently open is a simple and satisfying modification for those seeking a more consistent and sporty exhaust sound. By following these steps, you can easily unlock a more engaging auditory experience from your BMW in every driving mode. Enjoy the enhanced sound of your G20!
