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Old 05-12-2014, 05:52 PM   #1
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F30 N55 blow off valve

Will a blow off valve instillation on my 335i void my warranty with bmw?

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Old 05-13-2014, 09:00 AM   #2
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There is no such thing as an overall warranty. Each part or system has a warranty on it. So if you install a blow off valve on your 335i and have engine issues then your dealer isn't going to help you. If you then had window issues as that has nothing to do with the blow off valve they would still fit it.

That being said you'll have issues with a blow off valve. The ECU meters all the air into the system and recirculates the high pressure air. Adding a blow off valve is venting that out of the system so there is less air then the ECU thinks.

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Old 05-13-2014, 06:48 PM   #3
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Thanks for your feedback! I appreciate it

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