Engine light went out for a short period (one day) when I replaced the MAP sensor. When light re-appeared I reluctanly went to the dealer who diagnosed problem as faulty DMTL pump which loses seal. Apparently, defective DMTL pump does not affect engine performance. Dealer quoted $800 (Can) for new part, plus $1400 for labour.

I decided to put up with the engine light (but may cover in black tape), but may have to fix in a couple of years to pass emission test. Cost to repair looks to me to be excessive. Any thoughts? Thanks.

Murphman

 

 

Forgive my ignorance, as to what just is a D M T L pump?????

 

You are in the wrong forum but these guys see to know all about it.

https://www.bimmerfest.com/forums/sh...d.php?t=836865

 

I'd do a little more research but it appears to be a generic Bosch pump. Possibly

https://www.ebay.com/itm/Volvo-Land-...S!-1:rk:6:pf:0

 

Figured it might not be on my car, but was not sure.
Either way, had never heard of it, & did not know what it was.

 

Same pump is on the x350 for evaporative emissions diagnostics, might be a US-only requirement. It's buried above the fuel tank next to the carbon canister.