Brembo
Brembo 09.3946.10 Internally Vented Brake Disc Rotor 255x22mm, 4-Stud (4-Lug, 4-Hole), with Fixing Bolts/Screws – For BMW 3 Series E21 Saloon (Classic) 1975–1983 – Genuine OEM Replacement / Performance Upgrade
Brembo 09.3946.10 Internally Vented Brake Disc Rotor 255x22mm, 4-Stud (4-Lug, 4-Hole), with Fixing Bolts/Screws – For BMW 3 Series E21 Saloon (Classic) 1975–1983 – Genuine OEM Replacement / Performance Upgrade
Heads-up on cancellations & returns: if you cancel an order or return an item, you won't get back 100% of what you paid. We apply a 10% restocking fee, the outbound shipping is non-refundable, and we have to pass on Shopify / PayPal payment processing fees; these aren't returned to us when we refund you. International orders also lose on exchange-rate spread in both directions. If the original packaging is damaged or missing, a reboxing charge applies. For international orders specifically, if you refuse to pay our shipping invoice or supply a prepaid label after placing the order, the same deductions apply. We're upfront about this — please be sure of your purchase before ordering.
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Brembo 09.3946.10 Performance Brake Rotor for BMW E21 with Fixings
Give your classic BMW E21 the sharp, confidence-inspiring stopping it deserves with the genuine Brembo 09.3946.10 rotor. This vented construction disc delivers strong bite, superb heat control and consistent pedal feel on the road. If you are refreshing tired braking hardware on your 3 Series E21, this is a high quality, direct-fit solution with the reliability enthusiasts trust.
We run these on customer builds at MJ Modifications and feedback is consistently excellent. Smooth engagement, stable performance under repeated use and OEM-level fitment make this Brembo rotor a standout choice for classic BMW braking upgrades and maintenance.
Why it is a smart upgrade
- Authentic Brembo part for dependable performance and precise fit on E21 models
- Vented design improves thermal management and helps resist fade on fast road drives
- Supplied with fixings for a clean and straightforward installation
- Refined pedal response and predictable stopping in daily and spirited use
- Ideal as a premium replacement rotor for classic BMW restoration and servicing
Key details
| Manufacturer | Brembo |
| Part number | 09.3946.10 |
| Disc construction | Vented |
| Diameter | 255 mm |
| Thickness | 22 mm |
| Stud pattern | 4 hole |
| Included | Fixing bolts and screws |
Fitment guidance
Designed for BMW 3 Series E21 models requiring a vented 255 mm, 22 mm thick, 4 hole rotor. Axle position can vary by model and specification, so please verify before ordering.
- Send your UK registration or last 7 of the VIN and we will confirm compatibility
- Questions about fit for your E21 project or daily driver are welcome
Professional installation
Prefer expert fitting for your BMW brakes? MJ Modifications offers professional installation in Warwickshire. Request a quote at info@mjmodifications.co.uk.
What E21 owners are searching for
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Part number: 09.3946.10
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