What is the diameter size of the rear brake disc of the BMW 5 Series?
2 Answers
The diameter size of the rear brake disc of the BMW 5 Series is 330mm. Classification of brake discs: Brake discs are divided into solid brake discs and ventilated discs by structure. A solid brake disc is simply a metal disc used for braking, with no special construction. Ventilated discs come in two forms: slotted discs and drilled discs. Both treatments are designed to improve the cooling performance of the brake disc, reduce its thermal degradation, and provide better braking capability. Purchasing brake discs: First, check whether the replacement brake disc is a genuine accessory, the integrity of the product packaging, whether the anti-counterfeiting marks and packaging labels match the marks on the brake disc, and whether the product model matches the content of the certificate. Brake discs produced by regular manufacturers have clearer packaging printing, including license numbers and execution standards, while the packaging box contains certificates, production batch numbers, production dates, etc.
When it comes to the rear brake disc diameter of the BMW 5 Series, I've observed in daily use that it's typically around 330mm, varying slightly depending on the year and model. As an owner, I often check the brake disc wear myself; if the brakes feel soft or I hear unusual noises, it's time to measure the dimensions to confirm if replacement is needed. I recommend having a technician measure the thickness during regular vehicle maintenance to avoid sudden failure and accidents when driving at high speeds. This concerns driving safety, so never take it lightly. Only the correct size can ensure even distribution of braking force.
