M3 P rear spoiler

[CountvonC]

OEM is £779 - real CF, matte on the outside, forged on the inside, doesn't fit very well

Tell me about it, I am on spoiler no. 3 and that has just started to fall off again!

 

[Durzel]

I'm on my second, and it's definitely not as flush as it was when it was (re)fitted....

 

[Forty_Two]

Tell me about it, I am on spoiler no. 3 and that has just started to fall off again!

What have you learned along the way - buy this / don't buy that?

 

[Forty_Two]

Tell me about it, I am on spoiler no. 3 and that has just started to fall off again!

Why would spoiler A stay fixed in place and spoiler B fall off?

If the spoiler is a reasonable fit surely it then comes down to
1. How good the double sided tape is
2. How clean (free of grease) the boot surface was

 

[Durzel]

Water gets between the spoiler and the car and presumably over time and temperature changes (expansion, etc) cause the tape to lose adhesion? That's my best guess.

 

[MrBadger]

Water gets between the spoiler and the car and presumably over time and temperature changes (expansion, etc) cause the tape to lose adhesion? That's my best guess.

I didn't think you drove yours anywhere when it might be wet out

 

[Durzel]

It still lives outside though

 

[teaston]

Why would spoiler A stay fixed in place and spoiler B fall off?

If the spoiler is a reasonable fit surely it then comes down to
1. How good the double sided tape is
2. How clean (free of grease) the boot surface was

They must use crap tape, and not apply adhesion primer to the boot lid before sticking it.

I used 3M VHB tape and 3M Primer 94 on my BMW F30 spoiler, it was still stuck fast after more than 3 years, so much so that I actually broke the spoiler trying to remove it!