I, too, experienced alot of "trunklid open" with my 2001 - It stopped when I replaced the rear license plate light/latch assembly - the replacement was due to corrosion of the light socket - fixing the open trunklid was an added bonus

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Mark _______________________________
2001 X5 4.4i topaz blue/sand Sport, complete Dinan S2 , hitch, V1, tint, BSW Stage 1, Alpine INA-W910BT
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Life is not fair!
You can't protect people from their own stupidity!
Laughter makes life worth living