Fuel pump brand, Bosch or VDO/Siemens or doesn't it matter?
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AudiWorld Super User
Joined: Sep 2002
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From: Fort Collins, CO
Fuel pump brand, Bosch or VDO/Siemens or doesn't it matter?
My pump started whining the other day (with 2/3rds of a tank), today it hesitated 1/2 through an intersection like it was running out of fuel and in the past week I've been sporadically getting the codes:
00537 "Lambda (Oxygen Sensor) Regulation 11-10 - Control Limit Not Reached - Intermittent"
00553 "Mass Air Flow Sensor (G70) 07-00 - Signal too Low"
Both seem they can be thrown from fuel pressure problems according to the Bentley.
Lastly the fuel filter has been recently changed as well.
00537 "Lambda (Oxygen Sensor) Regulation 11-10 - Control Limit Not Reached - Intermittent"
00553 "Mass Air Flow Sensor (G70) 07-00 - Signal too Low"
Both seem they can be thrown from fuel pressure problems according to the Bentley.
Lastly the fuel filter has been recently changed as well.
Thread Starter
AudiWorld Super User
Joined: Sep 2002
Posts: 18,539
Likes: 0
From: Fort Collins, CO
Yeah I saw that...and I can get both for the same price from different suppliers...
...just didn't know if one was preferred over the other. I used Bosch pumps in the 90s I've had and they were just fine (quiet, never had a problem, etc).
I'm staying away from the Pierburgs though as I've heard nothing but horror stories from the B3/B4 crowd.
I'm staying away from the Pierburgs though as I've heard nothing but horror stories from the B3/B4 crowd.
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Thread Starter
AudiWorld Super User
Joined: Sep 2002
Posts: 18,539
Likes: 0
From: Fort Collins, CO
Oh, no I found the pump. Hadn't found any Pierburgs as of when I posted. Blau has'm though...
...FAP99 had the VDO/Siemens for $115 so I went for that one since your writeup said it was the typical OEM supplier.
Don't know which brand is in my S6 at the moment but somehow it made it well over 200k mi...so I can't complain.
Don't know which brand is in my S6 at the moment but somehow it made it well over 200k mi...so I can't complain.
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For the money difference I would pass on Pierburg and go VDO/Siemens or Bosch. I am running...
a Bosch right now but the previous pumps were VDO and the VDO/Siemens. The first one died. The second one was fine - I just wanted to try the Bosch. No big difference noted.
