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E90/E91/E92/E93 (2006 - 2013)
The E9X is the 4th evolution of the BMW 3 series including a highly tuned twin turbo 335i variant pushing out 300hp and 300 ft. lbs. of torque. BMW continues to show that it sets the bar for true driving performance! -- View the E9X Wiki

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Old 05-08-2009, 06:59 PM
Steve335cpe Steve335cpe is offline
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Location: Lincoln, Nebraska
Join Date: Dec 2007
Posts: 20
Mein Auto: 2007 335i Coupe
Curious? Anyone with fuel pump problems with Dinan upgrade?

I am curious if anyone who has reflashed their 335 ECU with Dinan II has had problems with fuel pumps.
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Old 05-08-2009, 10:29 PM
x986 x986 is offline
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Location: NorCal (Marin Co.)
Join Date: Oct 2006
Posts: 852
Mein Auto: 340i
18K on car. 12-15 with Dinan II. (The original) No problems.
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Old 05-09-2009, 05:23 AM
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Duncan17 Duncan17 is offline
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Location: Athens Ga
Join Date: Nov 2007
Posts: 263
Mein Auto: 335i Dinan 3, Z4M Coupe
Had Dinan II for 8 months, upgraded to III, 7 months ago, not a single problem. Touch wood!

'03 Ford Explorer "the big girl"
'6 330i "the Major"
'06 Z4M Coupe "Strider"
'07 Dinan 3 "little blackie"
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Old 05-09-2009, 07:00 AM
02fireman 02fireman is offline
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Location: Orlando,FL
Join Date: May 2008
Posts: 203
Mein Auto: BMW
Nope.. Not yet....

2007 Z4Mcoupe Monaco Blue #13/36
2003 Z4 3.0
1975 2002
2009 X535d Vermillion Red/Saddle (retired)
2008 E90 6Mt 335i ED 22 Jul (retired)
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Old 05-09-2009, 08:46 AM
roadkillrob roadkillrob is offline
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Location: Boston
Join Date: Aug 2006
Posts: 2,647
Mein Auto: 325CIC, 335CIC
Search, I can't remember if it was on here or on E90post, but there have been a few people and I remember one in particular as he ended up getting a refund I think in the end from Dinan as BMW was blaming it on Dinan and Dinan was blaming on the fuel pump, which was the issue, but without the Dinan software the fuel pump ran fine and BMW would not replace it until it failed under normal conditions.

Probably a one off and likely his pump failed eventually anyway. With or without a tune it seems fuel pumps fail about the same - the tune may put a little stress on the pump, but I think it will fail in the end no matter what if it is going to go!
2008 335i Vert Montego/Saddle/Grey Poplar
2013 Mercedes C63 AMG Obsidian Black/Black
2016 X5 M-Sport Mineral White/Mocha Design Package/Fineline Oak
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Old 05-10-2009, 08:38 AM
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twowinns twowinns is offline
Living my Ultimate dream
Location: McKinney, TX
Join Date: Mar 2007
Posts: 601
Mein Auto: 2009 E92 335i Dinan S3
No problems at all.
Current Toy
2009 335i Coupe Dinan S3 - Titanium Silver
Previous Toys
2007 335i Coupe - Space Gray
2009 X5 - Monaco Blue

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