Iso mas
 

I am in need of a Bosch MAS for my RUF BTR C-4 The RUF part is NLA It is a
Bosch # 0280217001 or a Volvo #3517881 There are only Chinese repos that RUF already tested and they are junk. Have leads on good used but prefer NOS or next to new. HELP! Tkx Jim F

per the volvo 240 parts catalog, that MAF is interchangable with bosch 0.280.212.016 aka volvo 3517020, which was used on all LH2.4 240/740/940 including turbo from 1989+

Mas
 

no, will not work, just looked them up and they have the newer 6-pin connector, have additional heat functions and then you need additional parts and wiring harness changes, not something I would dare tackle because of complicated Porsche/RUF computer interface.

is the Ruf LH2.2 or LH2.4 ? Volvo used LH2.2 up through 1988.

LH2.2 used MAF Volvo Part 1346645, Bosch 0.280.212.007

OH wait, there's the WEIRD one, LH 3.1, which SOME 240's used, that **** is scarce.

and yeah, thats what your number is, LH 3.1, used on SOME 240's from 1990-1993, I've never seen one, most cars those years were LH 2.4.

The Ruf is a 3.8 but it matches too a volvo 3 1 euro model.

LH 3.1 is not the engine size, thats the version of the Bosch LH engine management.

pierce yes you are correct. I misprinted. Still trying to find an NOS unit. I have feelers out everywhere. Tkx

you should be able to find rebuilt bosch units, I would expect those to be good. try www.fcpeuro.com and www.ipdusa.com, both those places cater to the older Volvo marketplace and tend to only carry what works.