Battery Problem? 2006 E60 M5 with low miles

[blistexworks]

I'm in the process of purchasing a 2006 M5 with 22,000 miles.

From visual inspection, the car's in great condition but one big problem: it won't start.

With the keyfob in, press on brake, push the start button ... nothing. No stalling, no additional lights on dash, etc. Just silence. However, door/trunk lock/unlock works fine.

The father of the young owner (he passed away abruptly and left the car in the current condition) found the battery replaced not so long ago with a non-OEM brand.



The father says he tried jumpstarting the car and the battery isn't just holding charge enough for it to start twice. Is the non-OEM battery the culprit or is there some bigger problem that I need to brace myself against?

Any idea as to get this monster running like it should would be much appreciated.

[E90dad]

It believe it's just the battery not being coded so it killed the battery.