Brake Disc BMW Z4 E85 E86 Rear Wheel Left Right N/O/S Ventilated Set 294X19

Brake Disc BMW Z4 E85 E86 Rear Wheel Left Right N/O/S Ventilated Set is an original BMW braking system component designed for installation on the rear axle, on either the right or left side. The set provides a solid foundation for restoring the braking system's efficiency in 1 and 3 Series vehicles, ensuring stable operating conditions for the brake pads and predictable vehicle behavior during braking.

Specifications and technical data

• SKU: 6794303-1
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 6794303
• Substitutable numbers: 6794303, 34216794303, 6766219, 34216766219, 6754137, 34216754137
• Location on the vehicle: Rear, Right, Left
• Category: Brake Disc Rotors

Technical characteristics and intended use

The presented set from the Brake discs category has been designed as an original BMW braking system component, taking into account requirements regarding rigidity, heat dissipation, and compatibility with factory calipers and pads. The vehicle placement covers the rear axle, both right and left sides, which allows for consistent replacement of components on both sides of the vehicle and maintenance of uniform braking characteristics.

Thanks to the use of factory disc geometry, the working surface is properly matched to standard pads, which reduces the risk of uneven wear and vibrations during braking. The set is particularly useful for rear axle service when it is necessary to replace consumables in accordance with the manufacturer's specifications.

Benefits of using original BMW brake discs

Choosing original BMW brake discs translates into predictable vehicle behavior in both typical and emergency road situations. The component's design is adapted to the vehicle's weight, brake force distribution, and the operation of assistance systems such as ABS or stability control. As a result, the driver receives consistent, repeatable brake pedal feedback and driving stability during intense deceleration.

The N/O/S (New Old Stock) condition allows for an economical restoration of the braking system's efficiency while maintaining the manufacturer's original specifications. This solution is particularly beneficial for post-accident repairs, restorations of older models, or when the priority is to maintain the factory configuration of components.

Selection, compatibility, and part identification

The element has a dedicated OEM part number and associated interchangeable numbers, which facilitates precise identification in BMW catalogs and professional parts selection systems. This allows for verifying compatibility with a specific engine version, model year, and vehicle equipment configuration, minimizing the risk of purchasing an incompatible component.

Before installation, it is recommended to compare the geometry and parameters of the discs with the elements currently installed in the vehicle, as well as to consult with a mechanic or technical advisor. Proper selection is crucial for maintaining uniform braking system operation and correct interaction with pads and calipers.

To deepen your knowledge on the safe selection of aftermarket braking components, it is worth reading the guide: Second-hand braking system – how to safely select discs, calipers, and ABS?. The article contains a practical checklist useful when purchasing used components.

Installation area and service recommendations

The placement of discs on the rear axle on the right and left sides requires following the appropriate service procedure, including checking the working thickness, hub condition, contact surface, and accompanying elements such as pads and mounting hardware. Replacement in pairs on one axle is recommended to maintain symmetry of braking forces and avoid differences in effectiveness between the sides of the vehicle.

During installation, pay attention to properly cleaning the contact surface with the hub, the correct tightening torque of the mounting bolts, and the initial bedding-in of the system after replacement. Such an approach reduces the risk of lateral runout, noise, and uneven pad wear.

Expanding BMW braking system service

If you are planning a comprehensive repair or upgrade of the braking area in your BMW and need other elements from the same group, such as additional discs, compatible pads, or supplementary lines, check the available parts in the BMW brake discs category.

In the case of extensive repairs, including other vehicle sub-assemblies, it is worth considering the use of verified salvaged parts. Practical tips regarding repairs using aftermarket elements can be found in the article: Bodywork and chassis – post-accident repairs using salvaged parts, which describes best practices for selecting used OEM components.