Belinda from Motorite - zero 8 three 3 four 6 four 8 seven 8
Give her a call, it's a direct link and she works with the claims etc, she helped me recently getting my warranty paid back in full with zero drama but that's not why I'm sharing her number.
FIY..I'm also not just handing out personal numbers, I asked her if I could share it with the members here since she explained every single detail around coverage and claims etc. She goes out of her way to assist.
The biggest problem with warranties 90% of the time is that people don't understand what they actually cover and a lot of people have a misconception about "your car must be stock". My car as an example, passed the inspection on all my upgrades done by the dealer; AC Schnitzer suspension, M Performance exhaust, 763M 19ā rims. Upgrades that raised red flags but would not prevent me from claiming if I had "original parts to be fitted when needed" like; BMS intake, charge pipe and downpipe. Software-wise, should you have MHD etc or a decent tuner who does all your work (Xcede), they all have options of stock maps when you need it. None of the above will prevent a claim from going through, none.
When you take your car in for a claim because something specific malfunctioned, that is the section they will be looking at, for example, if the problem lies in your motor bay; your suspension, wheels or exhaust, even if not done by the dealer, will not be looked at and will not prevent a claim because that's not where the problem is.
Common problems, N55 as an example with their tappet covers and iffy diaphragms, are not covered even though an insane amount of claims happen on parts like this.
Once you know what common problems your car has and you know what a warranty actually covers you can weigh your options.
Personally, I've reached a point where I just say fck the warranties. I'm doing all my maintenance stuff and looking after the car anyway so I might as well give back to myself and the car by doing performance and drivetrain upgrades to unlock the full potential of the car.
For you on the other hand, you've been searching high and low for this, give Belinda a call, tell her everything you have and everything you plan on doing with your car (even performance mods) and she will guide and assist you on it all. Have a list ready with common problems on your b58 and f20 chassis between the milage you're on now and the milage you would reach after 2 years and work through that list with her to verify what is covered and what is not.