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Brake disc mounting plate, REAR. Porsche 911 78-89 ❭ 93035208103
- Porsche 911 1978-1983 3.0L / SC
- Porsche 911 1984-1986 3.2L
- Porsche 911 1987-1989 3.2L G50
- Porsche 911 1978-1989 3.3L Turbo (930)
The brake disc mounting plate (often referred to as a backing plate or protection plate) is positioned behind the rear brake disc. It forms part of the brake assembly structure and helps support the mounting of brake components while shielding them from external contaminants such as road debris, dust and moisture.
Sold each, 2 required per vehicle.

Porsche 911 1978-89 Turbo
Porsche 911 1978-89 Turbo Look (M491)
Diagram ref no 29
This OE Match Brake disc mounting plate is manufactured to replicate the dimensions and mounting configuration of the original Porsche component, ensuring a precise fit during brake system repairs or restorations.
The mounting plate provides a stable base for the rear brake components and acts as a protective barrier for the disc and braking hardware. By maintaining correct positioning of the brake assembly and protecting critical components from debris, it helps ensure consistent braking performance and longevity of the brake system.
Replacing a damaged or corroded mounting plate restores the structural integrity of the rear brake assembly and ensures proper alignment of the brake components.
Function
• Brake Component Support: Provides mounting structure for rear brake hardware
• Protection: Shields the brake disc and caliper area from dirt, water and road debris
• Alignment Stability: Helps maintain correct positioning of the rear brake assembly
• Durability: OE-style steel construction designed to withstand heat and road exposure
Brake mounting plates are exposed to road salt, heat and debris, which can cause corrosion or structural weakening over time. A damaged or rusted plate may compromise the protection and positioning of brake components, potentially affecting brake performance. Replacing the plate with an OE Match component restores the proper structure and protection of the rear braking system.
Replace the brake disc mounting plate if you notice:
• Visible corrosion or rust damage
• Bent or cracked backing plate
• Loose or misaligned brake components
• During a rear brake overhaul or restoration
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
93035208103
The product you are viewing cross references to these numbers
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