2.5" MAF difference - Engine, Tuning and Performance - uk-mkivs

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2.5" MAF difference


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#1 mur3633

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Posted 25 September 2020 - 04:53 PM

Bought brand new Bosch MAF today and they give me 0 281 002 757.
It's so much different than OEM from 2000.

Does anyone is there any real difference between these two?
Got confused
PD115 AJM engine.

Left is the original one, right is new. a4b140fe740483cf4b6a7a9b7e22db23.jpgc12c34d5d49bee23a9c562d42713cbdb.jpg95630df195f68d60ec853485ed917e06.jpg4bddb970d3d59f36f11cbacdb0249a3a.jpg


#2 northpole

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Posted 26 September 2020 - 06:10 AM

New design is made to protect the maf sensor a bit better still flows the same... so nothing to worry about.
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#3 adam-

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Posted 26 September 2020 - 08:04 PM

It's a different in flow straightener.  Part numbers are different too. Where recommended that?


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#4 mur3633

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Posted 27 September 2020 - 06:03 AM

Contacted Bosch via email.
They wanted VIN number and answered this new one is for my car.

I also think it's only some kind of protection for MAF unit inside as Northpole said.

Car is much better now, pulls much better, MPG improved, no delay in accelration, etc.


Thanks anyway
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#5 northpole

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Posted 27 September 2020 - 07:55 AM

Yeah when i replaced mine back in the day i noticed the same design change...and did the exact same but found it on the website of Bosh, it was why i said it probably is just to protect the sensor itself better as when you look at it, the side the air comes in has finer mesh in front of it..  the internal sensor is the same though

 

and to be honest i actually think it is a better design, as the replacement never got as dirty as the old one I replaced when I got the car. (bought it when it was 8 years old, kept it until it hit 19 years old)  



#6 adam-

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Posted 27 September 2020 - 09:59 AM

It's not protection.  It's a flow straightener to ensure that the flow passing the sensor isn't turbulent and is laminar.  Without it you get erronous readings at low flows, particularly if the sensor is near a bend.


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#7 northpole

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Posted 27 September 2020 - 10:37 AM

Well more linear airflow would help keep the lot cleaner as I stated before... never looked into the reason for it but I guess it makes more sense.





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