The DME 944.168.121.02----The
.02 is a slight modification to the DME that improves the performance. In 1987 another slight modification became 944.168.121.
04
The modifications usually were a new EPROM-computer chip.
www.Motronic.ws** ©2007** ©2011 FR Wilk
Chart--look at the Porsche 944 part, the 0261200077 ECU used 3 different chips:
www.thePro2DMEeditor.com - Porsche only ECU List
What does this mean??
The base, late, 944/2 Porsche 2.5 engine
built from '85 to end of production 07-1987 used 3 different chips in the 0261200077 ECU.
So
"usually" if you use the 0261200077 ECU and the Porsche number is 944.618.121
.02 or.03 or.04 -----the DME should work in any late 944/924S 2.5L engine ---NOT the '88---has a higher compression engine.
Disclaimer----there was a reason for the change to improve normal engine operation and performance. Read=repair a fault.
I would keep on looking for the ......04 DME. Post a WTB in the Pelican classifieds:
Porsche 924/944/968 Used Parts For Sale & Wanted - Pelican Parts Technical BBS
But if you find the ..........02 for a decent price, get it for a spare. Should be under $100 incl s/h.
If another member can verify the information, because I have not tried an ....02 DME in my '87 924S.
GL
J_AZ