Can one Key Fob work for two cars?

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Cadillac SRX Second Generation Forum (2010-2016) Discussion, Can one Key Fob work for two cars? in Cadillac SRX / XT5 Forums; My wife got a 2013 Cadillas SRX Premium about 3 months ago. I liked the car and CUE system so ...
  1. #1
    jeffpaletz is offline Cadillac Owners Fanatic
    Join Date
    Jul 2011

    Can one Key Fob work for two cars?

    My wife got a 2013 Cadillas SRX Premium about 3 months ago. I liked the car and CUE system so much that I decided to trade in my 2003 DTS with 125,000 miles on it and got the new XTS Premium about 3 weeks ago. My garage now looks a little like a Cadillac showroom

    I've read both cars' manuals from cover to cover and noticed that each car can recognize up to 8 key fobs. The instructions for training the car to recognize additional key fobs is in the manual. Morrie's Cadillac in Minneapolis, MN gives buyers free car washes so each Saturday my wife and I have been having our cars washed so they look great. We only live about 3 miles away.

    I took my wife's SRX in to the dealer for a wash yesterday and brought the key fob from my car with me so I had both the SRX and XTS key fob with me. As it was about 7 degrees outside, after they washed the SRX I drove the car back into the empty service area and started the process for the car to learn the XTS's key fob. After putting SRX key in the door lock of the SRX and turning counter clockwise 5 times, the DIC never lit up or indicated that it recognized being put into learn mode. I tried to exit the learn mode and start the car and nothing would happen. Using the SRX key fob, i could lock and unlock the car, I could start the car using the remote start button on the remote, but the car would not run or recognize the key fob to start the car from inside the car. I had to call my wife to bring the other key fob for the SRX. The car didn't recognize that one either. Some how I caused the car to forget the key fobs for starting the engine. It took the service department about an hour to reprogram the car to recognize the two key fobs that came with the car. I'm sure glad I tried this at the dealer instead of on the road or at home or the car would have had to be towed in.

    The dealer indicated that it's not possible to have one key fob be recognized by two different cars. I'm wondering if anyone can confirm that. It would certainly be nice for each of us to be able to use either car with the key fob that we each keep with us. From the description of what is going on it appears that the car learns the signal from the key fob. Does anyone know if there is communication from the the car back to the key fob? Is each key fob married to a specific car so it only will work with one car?

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  3. #2
    TheCaptain's Avatar
    TheCaptain is offline Canadian ATS & SRX Mod
    Automobile(s): 14 ATS AWD 3.6L Performance - Son of a Gun Grey Metallic
    Join Date
    Aug 2009
    Moosomin Saskatchewan

    Re: Can one Key Fob work for two cars?

    Congrats on the two new Cadillac's!
    Each set of fobs are 'married' to a vehicle once it has been programmed, yes. However, you can have up to 8 fobs programmed to a car, as long as that fob is a 'blank' to start with. Otherwise, you end up just confusing the car and fob, and they mis-communicate. You will have to carry two fobs with you if you want to use each car.
    When you turn your car on, does it return the favour? '14 Cadillac ATS Performance 3.6L AWD in Son of a Gun Grey Metallic and Morello Red Interior

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  4. #3
    Cadillac Cust Svc's Avatar
    Cadillac Cust Svc is offline Cadillac Customer Service
    Join Date
    Mar 2010
    Detroit, USA

    Re: Can one Key Fob work for two cars?

    Quote Originally Posted by jeffpaletz View Post
    ...The dealer indicated that it's not possible to have one key fob be recognized by two different cars. I'm wondering if anyone can confirm that....
    Many congratulations on your Cadillac vehicles, Jeff! If you don't mind emailing me with the last eight of your XTS's VIN, then I would be happy to check my more technical resources to see if any confirmation is possible. My email is, and I'm happy to help where I can.

    Cadillac Customer Service

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