XYZ Racing Hollow Rear Brake Kit — Bmw 5 SERIES G 31 (2017-2026)

The G31 is the Touring bodyshell of BMW’s G30 5 Series, and that estate rear end puts real mass over the back axle – exactly where the standard brakes have the least margin once a heavy, fast-driven car starts working hard. The XYZ Racing Hollow Rear Brake Kit for the Bmw 5 Series G 31 attacks that problem at the rear corners, where a loaded Touring carries weight a saloon never does.

This is a rear big brake kit – a pair of left and right rear calipers and two-piece floating discs – aimed at owners who use the car’s full performance: long autobahn-style runs, spirited B-road work, or repeated heavy stops with a full boot. Bigger thermal capacity at the rear keeps the brake balance honest when the fronts are doing their share, so the car stays settled under hard deceleration rather than going light and nervous at the back.

What this brake kit does for your 2017-2026 Bmw 5 Series G 31

On a 1.8-tonne estate, the difference shows up the second time you brake hard from speed. The two-piece floating disc design sheds heat faster than a plain rear rotor, so pedal feel holds instead of going long and soft after the third or fourth firm stop, and the braided lines reinforce that bite. Three pad compounds let you match the kit to use: the Street compound for everyday road duty, the Sport pad for harder fast-road work and occasional track days, and the Racing compound when the G31 sees circuit or hillclimb time. The result is a rear axle that bites cleanly and predictably, with caliper presence to match behind the wheel.

About the Hollow rear brake kit

The kit is built around two-piece floating discs, a construction choice that strips rotational and unsprung mass from the rear corners while opening up cooling paths through the disc face, with the friction ring carried on an alloy bell. Less mass to accelerate and decelerate eases the load on the rear hubs and bearings, and the venting helps gas and heat escape from the pad contact patch under repeated use; discs can be specified drilled or slotted at the same price. Pad choice runs across three compounds – Street, Sport and Racing – so the same hardware suits a daily-driven 520d Touring or a hard-used 540i. The caliper body is hollow-cast as standard, with a Hollow Racing upgrade for serious track use that drops the dust cover for a 1000C rating and a two-year warranty. Calipers are painted at no extra cost in Red, Yellow, Gold, Black or Anodized Black, with Custom Color in any Pantone for £150, premium polished-forged Titanium, Polished Gold and Polished Silver, and candy Teal, Blue, Red and Orange; centre bells upgrade to two-tone anodized in five colours or to titanium, so the upgrade reads as deliberate through the rear spokes rather than an afterthought. It is a rear-specific package, designed to complement front braking capacity rather than work alone.

Fitment for the Bmw 5 Series G 31 (2017-2026)

This kit is mapped to the BMW 5 Series G 31 chassis across the full 2017 to 2026 production span. It is a rear-position fitment, so confirm your front setup separately if you are upgrading both axles. Check your exact variant and wheel clearance before ordering.

What buyers also search for

• BMW 5 Series G31 rear big brake kit for a heavy fast-road Touring
• G31 5 Series rear brake upgrade with two-piece floating discs for better cooling
• BMW 5 Series G31 Racing pad option for circuit and hillclimb days
• G31 rear caliper colour options – Red, Yellow, Gold, Black or Anodized Black
• BMW 5 Series Touring rear brake kit that keeps the brake balance settled under load

Choose your pad compound, disc style and caliper colour above and configure yours when you order.