The rubber covers for the electrical connections may be a bid degraded by now. Mine turned out to be when I had the spoiler off for paint and to install the Sirius antenna and backup camera. One of the pieces is a little split now and doesn’t want to stay secured on the lift gate side. Going to be a pita to replace if it gets worse, and if it’s even available any longer. Be careful.

Also, I seem to recall that there are a a couple smaller u shaped plastic spacers that fit onto the lip of the spoiler cover and, I presume help with a secure and rattle free fit to the base. I wasn’t expecting them to come off and get lost in the driveway.

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Current
Original owner 2002 E53 X5 4.4i to 4.6i swap
2026 G80 M3 6 spd
2025 G06 X5 50e
Former
1972 Audi Fox
1986 Saab 900S
1996 BMW Z3
1998 BMW E36 M3 Sedan
2004 BMW E46 M3
2006 Audi A3 Quatro
1993 Mopar 318 Jeep Grand Cherokee
2015 V6 Jeep Grand Cherokee