That's amazing (and not Ina good way).

I had to replace my lock to DLA guts about 4 times. I kept a spare in my glove box. When my key remote stopped working the key would last about 1000 actuations. At least in the end I could tell from the feel it was starting to fail.

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2011 E70 • N55 (me)
2012 E70 • N63 (wife)