Bosch MAF-Hitachi MAF, easy peasy!!!!!

Post by **davidbilyk** » Thu Aug 19, 2004 8:01 pm

Hello All, just a quickie, came across this web address one day whilst browsing for S4 information. Step by step guide on how to change over your unreliable Bosch MAF, for the later Hitachi one.
http://www.awe-tuning.com/media/pdf/RSK ... TE_2.0.pdf

Hope this is of use to you all!!!!!!

(PDF file by the way)

Dave

Post by **smurfbus** » Fri Aug 20, 2004 9:29 am

IIRC that needs new software also, so not so easy anless you live in states and have $$$ for the whole fueling kit!

Post by **Dippy** » Fri Aug 20, 2004 1:09 pm

The guide does say 'if requested' about the chip which implies that it's not mandatory. Since the guide also mentions fine tuning of 'drivability' issues, maybe that's what the new chip is for. So perhaps the Hitachi MAF can be used in place of the Bosch one without without a software upgrade, and reliability will be improved.

Post by **Druggie** » Sat Aug 21, 2004 10:42 am

How many have lost a bosch maf?

Post by **SimonS4MTM** » Sat Aug 21, 2004 12:50 pm

Post by **toasty** » Sat Aug 21, 2004 9:52 pm

me 2 !

Post by **Joshie** » Sun Aug 22, 2004 1:37 pm

Oh yes

Post by **DavidT** » Sun Aug 22, 2004 3:39 pm

Hmm, something for me to look forward too I guess

Post by **Dippy** » Mon Aug 23, 2004 12:14 pm

3 years and no problems (it's a Hitachi

)

Post by **DavidT** » Mon Aug 23, 2004 12:25 pm

OK, dumb question, how do you tell which you have - spanners or VAG-COM ?

I suspect mine will be the old one but thats OK, I am old too.

Post by **Dippy** » Mon Aug 23, 2004 12:31 pm

Mine has Hitachi written on it, which I can see just by inspection (with engine cover off). I think that Hitachi was only fitted to very late models.

Post by **AFAP18** » Wed Aug 25, 2004 11:39 pm

From 2001 and beyond, they were hitachi.

New wiring is needed if you want to do this setup.

Best Wishes
WOT

Post by **Verruckt** » Thu Aug 26, 2004 2:41 pm

Dippy wrote:The guide does say 'if requested' about the chip which implies that it's not mandatory. Since the guide also mentions fine tuning of 'drivability' issues, maybe that's what the new chip is for. So perhaps the Hitachi MAF can be used in place of the Bosch one without without a software upgrade, and reliability will be improved.

NO.

The voltage transfer functions for the two sensors is completely different. You absolutely need different software. For US spec, it's A box to M box conversion.

Post by **belgianS4** » Thu Aug 26, 2004 5:05 pm

Yep count me in lost one to...

Grr Bosh

Post by **KayGee** » Thu Aug 26, 2004 11:35 pm

Is this an ECU swap(plus the above change for the MAF) or does it require a rewire?

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Bosch MAF-Hitachi MAF, easy peasy!!!!!

Bosch MAF-Hitachi MAF, easy peasy!!!!!

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