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  #31  
Old 04-30-2016, 04:59 PM
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Quote:
Originally Posted by johnlacson View Post
System Lean. Fuel Trim Bank 1 & 2. No other codes came up.
Had similar codes. Ended up being my MAF.
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  #32  
Old 04-30-2016, 07:46 PM
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A bad MAF can throw a lean code, but the majority of the time, it is the rubber intake boot that connects the ICV and the throttle body. A genuine OE MAF is around 300-400 bucks while a new rubber intake booth is around 15-25 bucks. A vacuum leak is also a reason for a lean code.
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  #33  
Old 05-02-2016, 06:47 PM
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Found it!!! Cracked rubber elbow hose (part # 13541440102)

Temporarily patched it up with sealant tape for now and observing if that's really the culprit, but looks good so far...
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  #34  
Old 05-02-2016, 06:51 PM
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Are OEM replacement hoses equal in quality to original BMW hoses? Are there better replacement hoses out there?
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  #35  
Old 05-02-2016, 07:04 PM
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Mishimoto make silicone boots for the M54 but I am not sure if it will work for the X5. They make them for E46 330i's.

I never looked too deeply into it since I found out after I put in an OE hose. Maybe you can email them to check?
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  #36  
Old 05-02-2016, 07:09 PM
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Oooo... thanks! Sent them an email.
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  #37  
Old 05-02-2016, 07:22 PM
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Cool! It would be cool if those work. The E53 X5 is the orphan child of the BMW aftermarket lol.
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  #38  
Old 05-02-2016, 07:36 PM
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For $105 for a Mishimoto boot, I'll buy a Genuine BMW boot any time.
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2006 Infiniti G35
2001 BMW 3.0I E53 X5 Build date 08/2000 SOLD
Lotus Europa 1970 Destroyed by fire
Lotus Europa 1970 S2 Renault Powered
Lotus Type 52 1970 Twincam Webers Powered
PORSCHE 911 Targa 1982 The Garage Queen
Audi Avant donated to Kars for Kids
BMW 525IT Sold
Audi 4000CS Quattro Sold
Jensen Healey Lotus Powered Sold
Opel 1900 Sold
Triumph Spitfire 1971 Sold
Triumph Spitfire 1968 Sold
Plymouth "Cuda" 340 Six pack SOLD

Last edited by upallnight; 05-03-2016 at 07:17 AM.
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  #39  
Old 05-02-2016, 07:40 PM
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$105??? Ya... my E53 is bone stock... I don't think that's gonna help it much.
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  #40  
Old 05-02-2016, 11:51 PM
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SERVICE ENGINE SOON and the engine pictogram are interchangeable, kinda. The pictogram is used on Canadian cars, SES is for the USA.

Set the key to Position II (RUN), before engine start, if you have a USA car then you will get the SES light, if the Canadian version then you get the pictogram. If you have neither, then you have trouble.
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