Wanted To Buy NEED replacement key fob/advice how to replace

I guess those cheap chinese ones are not compatible.

Sounds familiar. My previous Marauder only came with one key, remote fob and valet key. Ordered a Mercury key blank and remote (package deal $20) off of eBay. Key cut and programmed correctly, remote was useless. $55 for a new remote and another $55 through the dealer to program everything and cut the key.
 
I guess I'll chime in since I started this...

I ended up ordering NOS from my local Dealer 2 FOBs for $90. And I got a REFUND ($25) from the ebay seller...who said I could just "throw the ones they sent me away"...

You get what you pay for...
 
I think I did a google search & came up with the place I bought from. Was only $17.94 shipped to my door which was a bargain in my eyes.
 
This is the key fob you need:

3W73-15K601-AA
FCC ID: CWTWB1U343
Can: 1788a-FWB1U343

Takes a CR2032 Battery

If the FCC / CAN IDs don't match, it won't work.

Programming key fobs from the 2004 Marauder Owners Manual:

Place the key in the ignition and
turn from 2 (LOCK) to 3 (OFF) and
cycle between 3 (OFF) and 4 (ON)
four times in rapid succession within
3 seconds.
After doors lock/unlock,
press any control on all transmitters
(up to four). When completed, turn
the ignition to 3 (OFF).

All transmitters must be
programmed at the same time.

When completed, turn the ignition to the 3 (OFF) position and wait at
least 20 seconds in order to use the recently programmed
transmitter(s).

All transmitters must be programmed during the same programming
cycle. A transmitter that is not programmed within the same
programming cycle will be erased and will no longer operate your
vehicle’s locks. If this occurs, you will have to reprogram all the
transmitters again, as you cannot just “add” a transmitter.
 
Hey Fastblackmerc,

I private messaged you a couple of times...it is a strange request, but I wanted to see what you thought?!!

Let a brother know!

Thanks!



This is the key fob you need:

3W73-15K601-AA
FCC ID: CWTWB1U343
Can: 1788a-FWB1U343

Takes a CR2032 Battery

If the FCC / CAN IDs don't match, it won't work.

Programming key fobs from the 2004 Marauder Owners Manual:

Place the key in the ignition and
turn from 2 (LOCK) to 3 (OFF) and
cycle between 3 (OFF) and 4 (ON)
four times in rapid succession within
3 seconds.
After doors lock/unlock,
press any control on all transmitters
(up to four). When completed, turn
the ignition to 3 (OFF).

All transmitters must be
programmed at the same time.

When completed, turn the ignition to the 3 (OFF) position and wait at
least 20 seconds in order to use the recently programmed
transmitter(s).

All transmitters must be programmed during the same programming
cycle. A transmitter that is not programmed within the same
programming cycle will be erased and will no longer operate your
vehicle’s locks. If this occurs, you will have to reprogram all the
transmitters again, as you cannot just “add” a transmitter.
 
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