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Brake Disc Cover Plates
This OE Match rear brake support mounting and plate kit is designed for Porsche 911 models from 1978 to 1989. The kit includes the essential backing plates and mounting components required to properly secure and support the rear brake assemblies.

Porsche 911 1978-89 Turbo
Porsche 911 1978-89 Turbo Look (M491)
Diagram ref no 3, 4, 5 and 29
Kit Includes
2 × OE Match Brake Support Plates – 93035208103
2 × OE Match Brake Mounting Plates – 93035280104
8 × Genuine Porsche Screws – 90006705703
8 × OE Match Hexagon Nuts – N0122418
The brake support mounting plates (also known as backing plates or protection plates) are fitted behind the rear brake discs and calipers. They serve as structural and protective components of the rear braking system, providing a mounting surface for brake hardware while shielding the braking components from road debris, dust and moisture.
This OE Match kit includes both plates required for the rear axle along with the correct mounting hardware to complete the installation.
The brake support plates help secure the rear brake assembly while also protecting sensitive components such as the brake disc, caliper and parking brake mechanism. By acting as a structural mounting point and protective shield, they help maintain the integrity and performance of the rear braking system.
Replacing worn or corroded plates ensures that the brake components remain properly aligned and protected from external contaminants.
Function
• Brake Assembly Support: Provides mounting structure for rear brake components
• Protection: Shields brake discs and calipers from dirt, water and debris
• Alignment Stability: Helps maintain correct positioning of the rear brake assembly
• Durability: OE-style steel construction designed to withstand heat and road exposure
Over time, brake backing plates can corrode, bend or weaken due to exposure to road salt, moisture and heat generated by the braking system. Damaged plates may compromise brake component alignment or reduce protection against debris. Replacing them with an OE Match set restores the correct structure of the rear braking assembly and helps maintain safe and reliable braking performance.
Consider replacing the brake support plates if you notice:
• Visible corrosion or rust damage
• Bent or damaged backing plates
• Loose or worn mounting hardware
• During a rear brake overhaul or restoration
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
BRAKEPLATEKIT.911.R
The product you are viewing cross references to these numbers
- 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)
Fits front and rear.


Porsche 911/912 1965-69
Porsche 911 1970-89
Porsche 930 1975-89
Porsche 914 1970-76
Diagram Ref No 6
- Porsche 911 1965-1968 2.0L / 912 SWB (F)
- Porsche 911 1968-1973 2.2L / 2.4L / 2.7L RS LWB (F)
- Porsche 911 1974-1977 2.7L / 1976-77 3.0 Carrera
- Porsche 911 1978-1983 3.0L / SC
- Porsche 911 1984-1986 3.2L
- Porsche 911 1987-1989 3.2L G50
- Porsche 911 1975-1977 3.0L Turbo (930)
- Porsche 911 1978-1989 3.3L Turbo (930)
- Porsche 914 (1970-1976)
Two needed per car. Price is for each.


Porsche 911 (930) Turbo 1978-89
Click 'Zoom in' for large parts diagram.
Diagram ref no 9
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
93035180301
The product you are viewing cross references to these numbers
- Porsche 911 1978-1989 3.3L Turbo (930)
Two needed per car. Price is for each.

Porsche 911 (930) Turbo 1978-89
Diagram ref no 9
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
93035180301
The product you are viewing cross references to these numbers
- Porsche 911 1978-1989 3.3L Turbo (930)
Two needed per car. Price is for each.


Porsche 911 (930) Turbo 1978-89
Click 'Zoom in' for large parts diagram.
Diagram ref no 3
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
93035280104
The product you are viewing cross references to these numbers
- Porsche 911 1978-1989 3.3L Turbo (930)
The brake disc cover plate (also known as a brake dust shield or protective plate) is mounted behind the rear brake disc and forms part of the rear brake assembly. Its primary role is to shield critical braking components - such as the brake disc, caliper and parking brake mechanism - from debris, dust and moisture encountered during driving.
Sold individually, two required per vehicle.

Porsche 911 (930) Turbo 1978 - 1989
Porsche 911 1978 - 1989 Turbo Look (option code: M491)
Diagram ref no 3
This OE Match Brake disc cover plate matches the original Porsche design in shape, mounting points and dimensions, making it ideal for repairs, brake overhauls or restoration of classic Porsche 911 Turbo models.
The rear brake cover plate protects the braking system while also helping maintain correct positioning of brake components. By acting as a protective barrier, it prevents debris from contacting the brake disc and helps prolong the life of surrounding brake hardware.
Replacing a damaged or corroded plate restores the protective function of the rear brake system and ensures proper fitment of the brake assembly.
Function
• Brake Protection: Shields rear brake discs and calipers from road debris, water and dirt
• Component Support: Helps maintain proper positioning of rear brake components
• Heat Resistance: Durable metal construction designed to withstand braking temperatures
• OE Fit: Manufactured to match the original Porsche plate for precise installation
Brake cover plates are exposed to heat, moisture and road salt, which can cause corrosion or structural damage over time. A deteriorated plate may fail to protect the brake components effectively and could lead to debris entering the braking system. Replacing worn plates with OE Match parts restores proper protection and helps maintain the longevity and reliability of the rear brake system.
Replace the rear brake cover plate if you notice:
• Visible rust or corrosion
• Bent or damaged backing plates
• Missing protective plate during brake service
• During a rear brake system rebuild or restoration
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
93035280104
The product you are viewing cross references to these numbers
- Porsche 911 1978-1989 3.3L Turbo (930)

Porsche 911 1978-89 Turbo
Porsche 911 1978-89 Turbo Look
Click 'Zoom in' for large parts diagram.
Diagram ref no 29
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
93035208103
The product you are viewing cross references to these numbers
- 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
- 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)
-
disc brake front axle 911 TURBO 1978-83 602-05
-
disc brake rear axle 911 TURBO 1978-83 603-05
-
brake front axle 911 TURBO / CARRERA M491 1987-89 602-05
-
brake rear axle 911 TURBO / CARRERA M491 1987-89 603-05
-
Brake front axle 911 TURBO / CARRERA M491 1984-86 602-05
-
disc brake rear axle 911 TURBO / CARRERA M491 1984-86 603-05
Porsche Brake Disc Cover Plates | Design911 High-Quality Replacement Parts for Protection, Cooling & Longevity
Brake disc cover plates, also known as backing plates or dust shields, are essential components that protect your Porsche’s brake discs and calipers from dirt, debris, and excess heat. Positioned behind the brake disc, they help maintain consistent braking performance by shielding the braking system from contaminants and improving cooling airflow. Whether used for restoration or maintenance, replacing worn cover plates helps preserve braking efficiency and prolong component lifespan.
At Design911, we offer a complete range of brake disc cover plates, precision-engineered for perfect fitment and durability. Manufactured from corrosion-resistant materials and designed to handle high thermal loads, our cover plates ensure long-term reliability and protection under both road and performance driving conditions. Ideal for service, restoration, or upgrade projects, these components maintain your Porsche’s stopping power and integrity.
What Do Brake Disc Cover Plates Do?
Brake disc cover plates perform a crucial protective and thermal management role within your Porsche’s braking system.
Core Functions:
• Shield brake discs and calipers from road debris, water, and dust.
• Assist with heat dissipation during braking.
• Reduce corrosion by preventing contaminant buildup.
• Maintain consistent braking efficiency and performance.
• Contribute to proper airflow for cooling under braking load.
With effective cover plates, your Porsche’s braking components stay cleaner, cooler, and more reliable for longer periods.
Why Do Brake Disc Cover Plates Fail or Degrade?
Due to their position near the road surface and braking components, cover plates are constantly exposed to moisture, dirt, and extreme temperature changes.
Common Causes of Failure Include:
• Corrosion or rust caused by road salt and moisture.
• Physical damage from road debris or gravel.
• Cracking or warping from heat and vibration.
• Bending due to improper installation or impact.
• General wear over time from environmental exposure.
When cover plates deteriorate, they lose their protective function — allowing dirt and moisture to affect the braking system, which can lead to premature wear or reduced performance.
Why Replace or Upgrade Your Porsche Brake Disc Cover Plates?
Replacing damaged or corroded cover plates restores essential protection to your braking system and maintains performance consistency. Design911’s high-quality replacements are designed for longevity, heat resistance, and accurate fitment across Porsche models.
Key Benefits:
• Restores full protection for brake discs and calipers.
• Improves cooling efficiency and braking stability.
• Prevents corrosion and contamination of key components.
• Manufactured from durable, corrosion-resistant materials.
• Direct-fit design for straightforward installation.
• Suitable for classic and modern Porsche vehicles.
Design911’s Porsche brake disc cover plates deliver reliability, precision, and long-lasting performance — the perfect solution for maintaining your Porsche’s braking excellence.
Highlights
• Premium Porsche brake disc cover plates and dust shields.
• Engineered from high-strength, corrosion-resistant steel or aluminium.
• Protects braking components from debris and moisture.
• Assists with cooling airflow for optimal performance.
• Ideal for restoration, maintenance, or performance upgrades.
• Fits a wide range of Porsche models for perfect compatibility.