Ok so would any of these mods void the BSRI :
1) installing K&N filter
2) BMW performance pedal
3) new exhaust
4) new set of wheels
5) installing new headlights
Here's an extract of the warranty claims ( not the same as BSRI)
• Non-BMW supplied options and alterations.
This warranty covers only those items sold as part of the original vehicle and excludes non-BMW supplied options, accessories and/or other items fitted to the vehicle at the instigation of the selling dealer or the purchaser.
Where the vehicle is repaired, disassembled or tampered with at workshops other than at a BMW Authorised Dealer’s outlet or if the identification numbers or marks of the items has been defaced, no claim can be made under this warranty. Neither BMW nor BMW Authorised Dealers accept any responsibility or liability relating to any user or third party if alterations to the vehicle are or have been effected.