RTS Performance 345mm Rear Brake Discs/Rotors for BMW M135i M140i M235i M240i M335i M340i M435i M440i (F20 F21 F22 F23 F30 F31 F32 F33 F36) - OE Direct Fit Replacement - UK Made - ECE R90 & G3500 - 1 2 3 4 Series

High-performance rear rotors for BMW Baby M - 345 mm - UK engineered - ECE R90 and G3500 approved

Bring serious stopping confidence to your fast BMW with these 345 mm rear rotors from RTS Performance. Precision engineered in the United Kingdom, certified to ECE R90 and G3500, and built for repeatable, consistent braking, they are a straight swap for the factory rear discs on the Baby M range. Expect stronger bite, stable pedal feel and improved heat control on spirited drives and fast road use, without compromising daily comfort.

At MJ Modifications we have installed these on customer cars and our own shop vehicles. Feedback has been outstanding, with owners reporting reduced fade, dependable deceleration and a more reassuring brake pedal on B-roads and motorway runs alike. If you are searching for rear rotors for BMW 1 Series, 2 Series, 3 Series or 4 Series performance models, this UK-made solution delivers.

Why choose these 345 mm rear rotors

• OEM-spec direct replacement - fits with factory calipers and standard pad shapes
• Optimised heat dissipation for fade resistance under repeated braking
• Consistent, confidence-inspiring brake feel for daily and fast road driving
• Manufactured in the UK to stringent ECE R90 and G3500 standards
• Ideal refresh for Baby M braking systems when upgrading pads or fluid

Compatibility - BMW models and chassis codes

Designed for the following models with 345 mm rear setup:

• BMW M135i - F20 F21
• BMW M140i - F20 F21
• BMW M235i - F22 F23
• BMW M240i - F22 F23
• BMW M335i - F30 F31
• BMW M340i - F30 F31
• BMW M435i - F32 F33 F36
• BMW M440i - F32 F33 F36

Key details

• Position: Rear axle
• Diameter: 345 mm
• Type: OEM-spec direct replacement rear rotors
• Certification: ECE R90 and G3500
• Manufactured in: United Kingdom

Real-world benefits

These UK-made discs are tailored for owners who want dependable, fade-resistant braking on powerful turbocharged Baby M models. They offer the right balance of durability and performance for everyday use, weekend blasts and fast A-road driving. Pair with quality pads and fresh brake fluid for a transformative feel.

Professional fitting available

We recommend expert installation for best results. Book fitting with MJ Modifications at our Warwickshire workshop. Request a quote at info@mjmodifications.co.uk.

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Buy with confidence from MJ Modifications - trusted performance parts, proven on our own cars and by our customers.