Dear tedv,

Hope you're well. Volvo VADIS - a superseded dealer parts/service database - shows that Airbag Module #3544162 was used in 1993 940s, while Airbag Module #3544163 was used in 1994 940s.

In the 1994 models, a passenger airbag was provided, which unit was not present in the 1993 models, which had a driver-only airbag.

As the airbag module is mission-critical, I'd err on the side of caution. I'd not install an Airbag Module from a 1993 940 in a 1994 940. The earlier unit (#3544162)likely would not be able to trigger the passenger-side airbag and might not work at all.

DEATH DANGER WARNING: Before trying to remove the driver's seat, remove the negative battery cable clamp from the battery terminal, and put the clamp in a plastic bag, to isolate it. This cuts power supply to the SRS (Airbag) System. The airbag sensor is under the driver's seat, affixed to the floor pan. If this sensor is banged - if you drop the seat on it, or drop a tool on it - the airbag could deploy. This can be lethal, at close quarters. It will also be costly: a new sensor is about $900.00.

Note: Part #3544162 is "no longer available". Only part #3544163 showa availability.

Hope this helps.

Yours faithfully,

Spook