I've always been told the same thing. However, the funny thing is that a few weeks ago I got a BMW lease return with 2 master keys, one of each type. The car was made for the "new" key, but along the way, someone ordered a new key, and received an "old" key. The key worked fine.
Originally Posted by waapples
i have 1999 bmw 528i and it came with the bulky looking remote control key, since i like the style of the newer version of the remote control key which has the bmw mark in the center part of the remote control, i would love to switch to one of those.
has anyone done this? because the dealer parts guys been telling me that it's impossible to do so....
The main difference is that the new key uses a rechargable battery, while the old key uses a traditional battery that can be replaced. I'm sure there is a mechanism in the car that recharges the key when it is in the car. Therefore, you can use an old key in the new cars and have no problems, but you can't use a new key in a car that was not built for it, because it will not recharge the key.
2013 BMW 335xi Sedan
Estoril Blue / Black Leather
6MT, M-Sport, Premium Pkg, Cold Weather Pkg, Dynamic Handling Pkg, Tech Pkg, HK Sound, M Performance Exhaust, M Performance Power Kit
Former: 2011 335xi Coupe -- 2009 MCS JCW -- 2006 MZ4 -- 2002 325i -- 1997 318ti -- 1991 318i