Local trusted mechanic suggested I may need new front discs soon, would there be any real benefit in upgrading to the M Sport calipers and discs if the cost to change isn’t that much different? I don’t track it, am generally very gentle on my brakes too. The car says both front and rear pads, installed in Feb 2023 still have 25k miles of life left.
2015 428i Gran Coupé.
The M Sport ones will be a reasonable cost differential.
They are very good brakes, though. I pulled out of a 340i sale when I test drove it - it didn’t have the M Sport brakes which my 320d did have, and it was noticeable in terms of braking confidence.
Reality is, though, your brakes are designed to outperform your tyres. I.e. they are limited by the grip your tyres can provide. Therefore, bigger brakes don’t mean better braking performance in emergency situations.
What I like about the M Sport brakes is that the entire setup is confidence inspiring. They feel stronger, they bite better and overall have better pedal feel than the standard brakes, in my experience.
But I wouldn’t pay to upgrade to them on a 428i if it didn’t have them.