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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N54 Turbo Engine / Drivetrain / Exhaust Modifications - 335i > Blow Off Valve Question



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      01-02-2009, 12:33 PM   #1
yousefa
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Blow Off Valve Question

got a 335i cabrio,iF I PUT A HKS BLOW OFF VALVE WILL IT VOID MY WARRANTY, I SPOKE TO DINAN, THEY SAID IF IT CAUSES DAMAGE IT WILL VOID, BUT IF IT CAUSES DAMAGE ILL JUST TAKE THE BOV OFF AND LET BMW FIX IT. IS THAT A GOOD IDEA OR NO?
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      01-02-2009, 12:55 PM   #2
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ah jeez
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      01-02-2009, 01:00 PM   #3
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ah jeez
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      01-02-2009, 01:09 PM   #4
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Ok guy this has been discussed a million times then after that its been beatened to death then reposted. But to answer your question yes just remove it before you take it in for service.
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      01-02-2009, 01:20 PM   #5
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Put 2 on, one for each turbo.
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      01-02-2009, 01:21 PM   #6
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Quote:
Originally Posted by lpphreakx06 View Post
Put 2 on, one for each turbo.
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      01-02-2009, 01:27 PM   #7
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      01-02-2009, 01:34 PM   #8
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location check anyone?
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      01-02-2009, 01:56 PM   #9
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Anything aftermarket can void your warrenty.
Make sure its removed before service!
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      01-02-2009, 02:14 PM   #10
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if you attach both BOV together then it will be 2 times as loud!
i did it and no import ever messes with me now.

but yah just take it off when you go in for service if something is wonky.
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      01-02-2009, 02:14 PM   #11
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Quote:
Originally Posted by xPaulBaiLeyx View Post
Anything aftermarket can void your warrenty.
Make sure its removed before service!
That's incorrect. You are protected under the Magnusson Moss Warranty act which states that a dealer must prove that a specific modification is causing a said issue before refusing warranty service. This means that they cannot outright void the warranty because you have an aftermarket mod but must prove that for instance a blow off valve is causing engine problems.
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      01-02-2009, 02:19 PM   #12
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Quote:
Originally Posted by Nick@Jlevi SW View Post
That's incorrect. You are protected under the Magnusson Moss Warranty act which states that a dealer must prove that a specific modification is causing a said issue before refusing warranty service. This means that they cannot outright void the warranty because you have an aftermarket mod but must prove that for instance a blow off valve is causing engine problems.
Yes Nick, I verywell understand this.
Although, but BMW does stat that any engine mod, tune, ECU mod will void your warrenty.
But yes, you are correct, In order to actually void the warrenty they must prove it was a modification that caused the failure
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      01-02-2009, 02:21 PM   #13
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Quote:
Originally Posted by xPaulBaiLeyx View Post
Yes Nick, I verywell understand this.
Although, but BMW does stat that any engine mod, tune, ECU mod will void your warrenty.
But yes, you are correct, In order to actually void the warrenty they must prove it was a modification that caused the failure
They don't have to prove anything to you. They will deny the warranty knowing you will not spend twice as much fighting in court.
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      01-02-2009, 02:27 PM   #14
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Quote:
Originally Posted by noro View Post
They don't have to prove anything to you. They will deny the warranty knowing you will not spend twice as much fighting in court.
My thoughts exactly!
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      01-02-2009, 02:31 PM   #15
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Quote:
Originally Posted by Nick@Jlevi SW View Post
That's incorrect. You are protected under the Magnusson Moss Warranty act which states that a dealer must prove that a specific modification is causing a said issue before refusing warranty service. This means that they cannot outright void the warranty because you have an aftermarket mod but must prove that for instance a blow off valve is causing engine problems.

Yes this is true. BUT, it's your word over BMW's word, and unless your willing to get into a nasty legal battle, be sure to take off any aftermarket parts.

And by the way, the N54 engine was not created using a BOV, it was created using a diverter valve. The BOV will shoot all your stored pressure in the atmosphere while the DV will send the pressurized air back to the turbos creating more power. The stock DV adds 10hp, while a BOV would not. I've read in forums BOV caused cels to pop up in the N54 engine. So be careful.

I would reccomend you just get a new intake that increases air flow. Such as the BMS intake (only $130) then you will be able to hear your stock DV's just fine.

Edit: turn off your caps lock, its really irritating.
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