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DIY: Do It Yourself
Post here to share or improve your wrench turning skills! All BMW E46 DIY tips, tales, and projects discussed inside. Learn to work on your car and know the right BMW parts you will need!

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Old 04-27-2010, 11:50 AM   #1
keromin4151
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Question Confused MAF - Sensor Connection Question

Okay. Trying to buy SIEMENS MAF Sensor since i saw that MAF unit's platinum wire is broken. I don't think i made any mistake...since i didn't touch it but the car is out of warranty and i just have to purchase new one.

Unless someone know how to repair platinum WIRE!

Anyhow, while searching for part number 13627567451, I noticed that people posted picture of sensor with sensor connecting wire (Square black thing on top of MAF housing) that has three prong. Mine has six. What is going on>
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Old 04-27-2010, 11:58 AM   #2
keromin4151
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NVM There was Sensor change. Air Mass Sensor (13 62 7 567 451) was used from 330i through 08/02 and (13 62 7 566 983) from 09/02. Someone vertify this for me.
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Old 04-27-2010, 12:15 PM   #3
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Go to www.realoem.com, punch in your VIN and browse parts

Or

Get in touch with guys at www.getbmwparts.com and give them VIN and they'll give you correct part #
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Originally Posted by roronoah View Post
so 2004 bmw's dont come with a diff?
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Old 04-27-2010, 02:01 PM   #4
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Thanks, I'll talk to Evan when he come online. I'll check OEM website later. Thanks for the info.
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Old 04-27-2010, 03:48 PM   #5
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I have the same issue. Got one on Ebay for $65 but it was a three prong. 6 prong ones seem to be in the $350-400 price range. I can't believe there's that much of a price increase between the two. My SES light is on and my codes are that I'm running lean. I'm going to check the hose to see if that's the problem, but doubt that's the problem. I already cleaned the MAF and it's still tripping the code.


Quote:
Originally Posted by keromin4151 View Post
Okay. Trying to buy SIEMENS MAF Sensor since i saw that MAF unit's platinum wire is broken. I don't think i made any mistake...since i didn't touch it but the car is out of warranty and i just have to purchase new one.

Unless someone know how to repair platinum WIRE!

Anyhow, while searching for part number 13627567451, I noticed that people posted picture of sensor with sensor connecting wire (Square black thing on top of MAF housing) that has three prong. Mine has six. What is going on>
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Old 04-27-2010, 07:16 PM   #6
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I haven't physically confirmed this... I read somewhere that hyundai sonatas use the exact same MAS as ours.
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Old 04-27-2010, 07:28 PM   #7
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Quote:
Originally Posted by zhpbmw View Post
I have the same issue. Got one on Ebay for $65 but it was a three prong. 6 prong ones seem to be in the $350-400 price range. I can't believe there's that much of a price increase between the two. My SES light is on and my codes are that I'm running lean. I'm going to check the hose to see if that's the problem, but doubt that's the problem. I already cleaned the MAF and it's still tripping the code.
Are you sure that your intake boot is not ripped?
Which exact codes you getting?
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so 2004 bmw's dont come with a diff?
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Old 04-27-2010, 07:33 PM   #8
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Lean codes really sound like a hole in the intake boot especially if the codes are for lean B1 & B2 together. Chas
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Old 04-27-2010, 07:44 PM   #9
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Found it.

Here's the thread that talked about the MAS from sonatas.

http://forum.e46fanatics.com/showthr...hlight=hyundai
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Old 04-27-2010, 10:41 PM   #10
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Quote:
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I haven't physically confirmed this... I read somewhere that hyundai sonatas use the exact same MAS as ours.
If you have an MS45 DME or an M56 engine (ZHP, post 03/03 production 330's and SULEVs ), you CANNOT use a Sonata MAF.

I searched for 3 months, I never found a cheaper substitute for OEM. I just went with a used part...which works fine.
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Old 04-28-2010, 07:35 AM   #11
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If you have an MS45 DME or an M56 engine (ZHP, post 03/03 production 330's and SULEVs ), you CANNOT use a Sonata MAF.

I searched for 3 months, I never found a cheaper substitute for OEM. I just went with a used part...which works fine.
Which year Sonata? 2001?
I checked AutohausAZ and they have Sonata MAF for ~$230 I believe and VDO-Siemens 2001 330i MAF is ~$200.

Would this MAF work as a replacement?
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so 2004 bmw's dont come with a diff?
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Old 04-28-2010, 07:51 AM   #12
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You have to go by the Siemens part #. I think its 5WK 642 or something for the BMW/Hyundai MAF. The MS45 MAF is 643 which seems specific to the MS45 330s.
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Old 04-28-2010, 08:05 AM   #13
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So Siemens is OEM supplier of MAF sensors for E46 BMW?
In other words is MAF sold by AutoHausAZ OEM?
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so 2004 bmw's dont come with a diff?

Last edited by Hrvat; 04-28-2010 at 08:16 AM.
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Old 04-28-2010, 08:36 AM   #14
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No idea if Siemens are the sole supplier. But they seem to have covered 02 Sonata 2.4L built and 330i around 03 year. I don't understand why there is extra cost involved from switching from 3 prong to 6 prong unless i pry open the sensor and study the circuit schematic for a bit. Nevertheless, i wonder if the information feed that you get from sensor with 6 prong is more than that of 3 prong or they just have two same set and they are taking avg? LOL. No idea really. And companies rather include circuit board schematic now these days and it is ***** trying to figure out the circuit design. As for purchase 6 prong connector type MAF, i already got that done last night. As for making sure i pulled the right code, I only had one code when i used code reader from Bimmertools (thank you guys for making this) and I was able to narrow down OBDII code to BMW specific code. As for OBDII code (from autozone), i had p0171 and p0174 (lean on banks so i open the hood to find a ripped intake boot). I replaced the intake boot. And it was still throwing codes, in fact it increased number of codes (Original Thread Here). So, i decided to clean the DISA and MAF. When i cleaned the DISA, the rough idle decreased - in agreement with what lot of people said. But the car was handle like **** still. Confused me as to why it increased so I got a code reader from Bimmertools (since i am too lazy to waste gas going back and forth to autozone whenever i have car trouble). Read the code, 4 code went to one type 20 code c2783 (MAF). So, i pulled the MAF out to clean it. When i tried to clean out MAF again, i noticed that there is broken platinum wire.

While looking for the recommended replacement part by GAULT BMW at Binghamton. I noticed that there is subtle change in the posted picture of the MAF unit. First i noticed that is six prong and i have one of the shield broken (i am guessing someone tempered with it). Anyhow, i ordered the replacement and i let you know if this is the right fit & if there is significant change to the car (I'll try to describe it accurately).

Thanks for responses.
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Old 05-05-2010, 08:34 PM   #15
keromin4151
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Yup...it fits like a glove & now the car is happy For all E46 2003 and up, it should be six prong sensor (13 62 7 566 983). Thanks ALMSBMW for OEM part !
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Old 05-05-2010, 09:00 PM   #16
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@Keromin

Thanks for the update and your observations about the prongs. I'll make note of that for future reference.
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Old 05-06-2010, 04:24 PM   #17
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Quote:
Originally Posted by Hrvat View Post
So Siemens is OEM supplier of MAF sensors for E46 BMW?
In other words is MAF sold by AutoHausAZ OEM?
I believe so. I did my research using the Siemens part # which is stamped on the MAF.

The MS45s have a couple of subtle differences over the MS43s, most of it seems emissions related. One is the MAF. The MS45 also has wideband precat O2 sensors.
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