[AndrewC1989]

Originally Posted by lamh

Has anyone tried the BA15S of the same brand (Tuincyn) for the tails?
https://www.amazon.ca/dp/B0725VQZS3/..._zvQVDbV0VS6C0

I'm in Canada and they're easier to get so wondering if anyone has had any luck with them, with or without coding.

No, but I've had the P21W's as front indicators in both my M2 and my 328 for over a year now and have had 0 issues. For $20 I would just give them a try and see. If the front indicators are solid quality I don't see why the same brand wouldn't make a good tail light bulb.