Can I do it? My wife's 850 died. Can I reprogram the keyless entry remote to work with my 850? I feel like I've seen a how-to on that somewhere before.

Thanks
Ben

Depends on the year of the car.

Klaus
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The 164 has a new home, all I am left with are a 95 854T and a 98 V70R :)

My wife's is a 94. Mine is a 95.

Turn the key from off to pos II 5 times. Leave it in pos II on the 5th. The red light on the dash will light. Then push lock or unlock on the remote and the red light will blink for 10 seconds and the remote will then work.
Make sure the doors are closed before you do this. Lets hope the 1994 is compatable with the 1995.

Klaus
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The 164 has a new home, all I am left with are a 95 854T and a 98 V70R :)

Will this work on a 2001 Volvo S40 remote?

Nope. It's off to the dealer for you.
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The 164 has a new home, all I am left with are a 95 854T and a 98 V70R :)