My first post after lurking on this site for a while. :-)
I bought my 2013 C-Max in 2015, and really enjoy it... I often say that I don't understand why there aren't more of them out there.
I got it with two wireless keys, and lost one not long ago.
I noticed someone selling what appeared to be an identical remote key fob on Ebay, for a lot less than my dealer sells them for, so I decided to give it a shot. The listing said it worked for C-maxes including years prior to 2013 - when I believe they were first introduced to North America - so that might be a clue that this key is for European models, although I didn't think at the time there'd be a difference.
My new fob looks identical to my remaining working one, and both transmit on 433 MHz ( the locksmith who cut the emergency key had a device that confirmed this), but my local dealer was unable to program it to work with my car. :-(
I opened both keys up to have a look inside, and they look identical; the only difference is that the gray rectangular components (coils, I believe) in my working key are stamped with the number "228" and my new, non-working key's coils are stamped with the number "242".
(See picture below, of an aftermarket key like the one I bought.)
So, questions for the group:
-Has anyone else bought an aftermarket key for their North American C-Max? Did it work? Where did you get it from?
-Does anyone know what the 228/242 stamps on the coils mean? Do I need to find another key with "228" coils?
Thanks in advance!
Hopefully there's a picture above, showing the coils stamped with "242". The ones in my working key say "228".
If the picture doesn't post correctly, it's at: