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NZ_M3 · 10-10-2017, 02:07 AM

Given that some of you probably don’t venture over to m3forums often I thought I best repeat Map sensor thread here!!

If you didn’t already know the original CSL Map sensor is now NLA, in place BMW have released a replacement sensor hacked together from a French car. Aesthetically it is a disaster in my opinion. So I’ve come up with an alternative - and I am going to assert intellectual property over it (such does not extend to vehicle owners wanting to fashion their own, but only just to stop BMW from selling my idea and profiting from it) and just so I can take legal action against them if they do - sort of in the same fashion that they go after true enthusiast owners for no good reason.

As we all know the original CSL Map sensor is no longer available and the BMW new replacement sensor seems very hacked together. I have finally had time to test my other alternative sensor.

So I thought I'd start a thread in here to update the progress from this original thread:

http://www.m3forum.net/m3forum/showthread.php?t=589529

And a repost of what I wrote on page 2 of the above thread:

There is a little known fact that the CSL map sensor was actually just a generic Bosch item with a bespoked casing.

BMW actually removed the reference to its part number in later map sensor productions.
Original reproduction sensors with no correct Bosch part numbers

Here is the original CSL Map sensor showing its part number 0 261 230 115

But it is actually just a Bosch 0 261 230 series sensor in Formula DS-S2 with 3 pin plug.

https://www.bosch-automotive-catalog...26autoLoad%3D1

If you search all Bosch map sensors in 0 261 230 form you get about 450 different variants but only about 40 in DS-S2 Formula form and even less in 3 pin configuration.

0 261 230 058 is one of those ones that appear.

But through my research I found another that I thought was a better fit aesthetically. It carried part number 0 261 230 101. This coincidentally was used in an Alfa 3.2l V6 engine. It seemed logical to me.

The dimentional drawings was also very similar to the CSL sensor. However upon receiving it I noticed whist it bolted up almost perfectly the sensor nose was little longer and needed to be spaced up by around 1.5mm and the O ring off the original CSL sensor to have a snug sealed fit. Easily enough done really and BMW could have easily used this sensor with the addition of an adapter plate.

I tested the sensor reading on the bench and it appears to confirm that the scaling was exactly the same as the Original CSL one.

I haven't however had time to test this on a car yet but I will do so when I get some time. But from what I have researched it will function exactly the same as the OEM CSL one without any need to change scaling in the DME software. The wiring is also made easy by adapter harness you can readily buy from BMW.

Plug end on the MAP sensor is just a generic Bosch 3 Pin common rail diesel injector plug part number 1928404072 or 1928300599 or 1 928 403 966 (Febi does one also and it's part number is 5000157024671)

The CSL plug harness adapter pigtail from BMW is part number 83300413582 (thanks to Terra!!)

Make your own with either the 101 sensor or the 058 sensor above and it'll cost less than what BMW charges for this MAP sensor. I left my pigtail quite long for testing purposes but in reality it can be cut down and you'd have a neat plug and play solution that looks better than the BMW replacement in my opinion.

10-10-2017, 02:07 AM	#1
NZ_M3 S5, Sport On, DSC M-track Join Date: Jun 2008 Location: Auckland, New Zealand Posts: 1,434 Casino cash: $13579	Alternative CSL MAP sensor Given that some of you probably don’t venture over to m3forums often I thought I best repeat Map sensor thread here!! If you didn’t already know the original CSL Map sensor is now NLA, in place BMW have released a replacement sensor hacked together from a French car. Aesthetically it is a disaster in my opinion. So I’ve come up with an alternative - and I am going to assert intellectual property over it (such does not extend to vehicle owners wanting to fashion their own, but only just to stop BMW from selling my idea and profiting from it) and just so I can take legal action against them if they do - sort of in the same fashion that they go after true enthusiast owners for no good reason. As we all know the original CSL Map sensor is no longer available and the BMW new replacement sensor seems very hacked together. I have finally had time to test my other alternative sensor. So I thought I'd start a thread in here to update the progress from this original thread: http://www.m3forum.net/m3forum/showthread.php?t=589529 And a repost of what I wrote on page 2 of the above thread: There is a little known fact that the CSL map sensor was actually just a generic Bosch item with a bespoked casing. BMW actually removed the reference to its part number in later map sensor productions. Original reproduction sensors with no correct Bosch part numbers Here is the original CSL Map sensor showing its part number 0 261 230 115 But it is actually just a Bosch 0 261 230 series sensor in Formula DS-S2 with 3 pin plug. https://www.bosch-automotive-catalog...26autoLoad%3D1 If you search all Bosch map sensors in 0 261 230 form you get about 450 different variants but only about 40 in DS-S2 Formula form and even less in 3 pin configuration. 0 261 230 058 is one of those ones that appear. But through my research I found another that I thought was a better fit aesthetically. It carried part number 0 261 230 101. This coincidentally was used in an Alfa 3.2l V6 engine. It seemed logical to me. The dimentional drawings was also very similar to the CSL sensor. However upon receiving it I noticed whist it bolted up almost perfectly the sensor nose was little longer and needed to be spaced up by around 1.5mm and the O ring off the original CSL sensor to have a snug sealed fit. Easily enough done really and BMW could have easily used this sensor with the addition of an adapter plate. I tested the sensor reading on the bench and it appears to confirm that the scaling was exactly the same as the Original CSL one. I haven't however had time to test this on a car yet but I will do so when I get some time. But from what I have researched it will function exactly the same as the OEM CSL one without any need to change scaling in the DME software. The wiring is also made easy by adapter harness you can readily buy from BMW. Plug end on the MAP sensor is just a generic Bosch 3 Pin common rail diesel injector plug part number 1928404072 or 1928300599 or 1 928 403 966 (Febi does one also and it's part number is 5000157024671) The CSL plug harness adapter pigtail from BMW is part number 83300413582 (thanks to Terra!!) Make your own with either the 101 sensor or the 058 sensor above and it'll cost less than what BMW charges for this MAP sensor. I left my pigtail quite long for testing purposes but in reality it can be cut down and you'd have a neat plug and play solution that looks better than the BMW replacement in my opinion. Last edited by NZ_M3; 10-10-2017 at 02:19 AM.