Ok after a small ruckus on another forum I have been researching MAF sensors from Bosch
our cars use a Bosch MAF 0 280 213 017 this is a very expensive part and is prone to contamination especially from over oiled K&N filters
during my efforts to find an alternative I found the following information.
so with a little more research and asking a few questions in other places the numbers starting from 0 280 213 007 all measure the same amount of Air Mass (KG/Hour) the only difference is mountings and connection type
so a replacement for ours would possibly be 0 280 213 007 off a Volvo 940 brand new at £63.00 instead of 0 280 213 017 at £830.00!
this was all kicked off by a guy repairing his with a bit of copper wire when he broke his cleaning it, which worked by the way, he reports much better throttle response with a new wire???
Bosch Short Code for this part is HLM-2-18 this is a list of all other MAF with the same short code
BOSCH 0 280 212 016 Air Mass Sensor
BOSCH 0 280 212 019 Air Mass Sensor
BOSCH 0 280 212 024 Air Mass Sensor
BOSCH 0 280 213 012 Air Mass Sensor this looks a good candidate
BOSCH 0 280 213 017 Air Mass Sensor
BOSCH 0 280 213 021 Air Mass Sensor
BOSCH 0 280 213 025 Air Mass Sensor
http://www.ebay.co.uk/itm/MASS-AIR-FLOW ... 1053605088
just found this
http://rennlist.com/forums/968-forum/62 ... ensor.html
so my research was correct