Only issue I have with replacing the valve is that for me it didn't help any and the fact I was out the money for Freon and the valve.

Well that and it was a pain to fool with from under the car.

Factoring in the cost :

$40 crappy snap ring pliers set
$15 Freon
$15 valve
Gas to go get Freon and valve.

So $70 in parts and the royal pain of fooling with the compress from under the car.

New compressor which I had to buy anyways because the valve didn't fix it was $110 or so.

So a bit more and you have a new compressor and piece of mind.

Its just not worth it to fool with the valve. If the valves toast then the compressor isn't that far off. New compressor has new valve.

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Just BMW's - All cars and trucks was two pages long
1994 318is
1997 528i
2000 323i
2001 X5 3.0 auto
2005 X5 3.0 auto
2011 535xi auto
2013 X5 xdrive35 Turbo
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Aftermarket E53 Radio Install