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Brake Disc Cover Plates
By OE Match
- 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 914 (1970-1976)
Porsche 911 1969-89
Porsche 930 1975-77
Porsche 914-6 1970-76
Click 'Zoom in' for large parts diagram.
Diagram Ref No 5
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
90135180117
The product you are viewing cross references to these numbers
This kit is comprised of the following items:
- 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
Fits:
Porsche 911 3.0L 1974-83
Porsche 911 3.2L 1984-89
Click 'Zoom in' for large parts diagram.
Diagram ref no 3
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
91135280120
The product you are viewing cross references to these numbers
This kit is comprised of the following items:
- 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
This OE Match kit brings together all critical components involved in supporting and protecting the rear brake caliper and disc area. It includes the main structural mounting plates, protective disc cover plates, and the correct genuine Porsche bolts, washers, and nuts needed for proper installation.
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
Diagram ref no. 3, 4, 5, 6 and 15
This kit includes:
2 × OE Match Brake Support Mounting Plate - OE Ref: 91135208130
2 × OE Match Rear Brake Disc Cover Plate - OE Ref: 91135280120
4 × Genuine Porsche Hex Head Bolt (M8 × 16) - OE Ref: 90007508704
4 × Genuine Porsche Washer - OE Ref: N0122418
4 × Genuine Porsche Hexagon Nut - OE Ref: 9000760250C
Together, these components:
• Provide a rigid and correctly aligned mounting base for the rear brake calipers
• Protect brake discs and surrounding components from debris, dirt, and road contamination
• Ensure accurate caliper positioning relative to the brake disc
• Restore factory-correct hardware and fastening integrity
• Support consistent braking performance and even pad wear
This kit is ideal for brake overhauls, restorations, or when replacing corroded or damaged original mounting hardware.
Function:
• Brake support mounting plates: Anchor and align the rear brake calipers
• Disc cover plates: Shield brake discs and hubs from debris and moisture
• Genuine bolts, washers & nuts: Ensure proper torque, clamping force, and long-term fastening security
• System integrity: Maintains correct brake geometry and mechanical stability
Over time, rear brake mounting plates and disc covers are prone to corrosion, deformation, and fatigue, especially on classic vehicles. Worn or damaged hardware can lead to:
• Misaligned brake calipers
• Uneven brake pad wear
• Increased brake noise or vibration
• Reduced braking consistency
Replacing these components as a matched kit ensures the rear brake system is securely mounted, properly protected, and restored to original operating standards.
When to replace. Replace or install this kit when:
• Performing a rear brake overhaul or restoration
• Original mounting plates or disc covers are rusted or damaged
• Fasteners are corroded, stretched, or missing
• Brake alignment or caliper stability issues are present
• Refreshing suspension and brake hardware together
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
91135208130
The product you are viewing cross references to these numbers
This kit is comprised of the following items:
- 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)
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
This kit is comprised of the following items:
- 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 914 (1970-1976)
Front Brake Disc Backing Plate - fits Left or Right
Sold each - 2 required per car
Restore proper brake protection and factory-correct
appearance with this OE Match Front Brake Disc Backing Plate.
This component forms an important part of the
braking system by protecting the brake disc assembly from road debris while
helping to manage airflow around the brake components.
Fits:
- 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 914 (1970-1976)
Often referred to as a brake dust shield or brake disc splash guard, the backing plate sits behind the brake disc and provides a protective barrier between the braking system and contaminants thrown up from the road. It also helps guide cooling airflow around the brake assembly, contributing to consistent braking performance.
As these plates are mounted underneath the vehicle, they are frequently exposed to moisture, road salt, stone impacts and corrosion. Replacing damaged or rusted backing plates helps maintain brake system protection while restoring the appearance of the suspension and braking assembly.
What Does a Brake Disc Backing Plate Do?
The brake disc backing plate performs several important functions within the braking system.
Its primary roles include:
- Protecting the brake disc from road debris
- Shielding brake components from dirt and water
- Helping manage brake cooling airflow
- Reducing contamination around the brake assembly
- Protecting wheel bearing components
- Supporting long-term brake system reliability
- Maintaining factory brake system design
Although often overlooked, the backing plate contributes to the overall durability and effectiveness of the braking system.
Why Do Brake Disc Backing Plates Fail?
Brake backing plates are constantly exposed to harsh operating conditions beneath the vehicle.
Common causes of failure include:
- Corrosion caused by moisture and road salt
- Stone and debris impact damage
- Accident or kerb strike damage
- Age-related deterioration
- Metal fatigue
- Improper handling during brake servicing
- Long-term environmental exposure
Over time, corrosion can weaken the plate, causing distortion, cracking or complete failure.
When Should a Brake Disc Backing Plate Be Replaced?
Brake backing plates should be inspected whenever brake discs or wheel bearings are serviced.
Common signs replacement is required include:
- Visible rust or corrosion
- Cracked or damaged plate edges
- Bent or distorted backing plates
- Contact between the plate and brake disc
- Excessive brake dust contamination
- Missing sections caused by corrosion
- Restoration or refurbishment projects
- Suspension rebuild work
If the backing plate begins rubbing against the brake disc, it should be replaced immediately to prevent noise and potential damage.
Why Replacement Matters
A damaged brake backing plate can compromise protection of the braking system and detract from the quality of a restoration.
Benefits of replacement include:
- Improved brake component protection
- Reduced contamination from road debris
- Correct brake cooling airflow management
- Improved reliability
- Restoration of factory appearance
- Prevention of brake disc contact issues
- Enhanced long-term durability
- Ideal for restoration and maintenance projects
For classic Porsche models, replacing worn backing plates helps preserve both function and originality.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
90135180117
The product you are viewing cross references to these numbers
- 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
Fits:
Porsche 911 3.0L 1974-83
Porsche 911 3.2L 1984-89
Diagram ref no 3
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
91135280120
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 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
The brake mount plate provides a solid and secure base for the rear brake caliper and its associated components. It is designed to match the shape, mounting points, and strength of the original Porsche component, allowing for direct, hassle-free installation without the need for modification.
Sold each, Fits left and right.
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
Diagram ref no. 15
The mounting plate plays a key role in the brake system’s mechanical integrity, helping anchor the caliper in the proper position relative to the brake rotor and suspension components.
The brake support mounting plate serves several essential functions in the braking system:
• Provides a stable attachment point for the brake caliper
• Ensures proper alignment of caliper relative to the brake rotor
• Distributes braking forces evenly through the suspension and chassis
• Supports safety-critical brake function under hard stopping
Without a solid mounting plate, the caliper can shift or flex under load, leading to inconsistent braking performance, uneven pad wear, increased noise, and potentially compromised stopping power.
Function:
• Mounting interface: Secures the brake caliper to the suspension/axle housing
• Load distribution: Handles braking reaction forces to prevent flex and movement
• Alignment support: Keeps the caliper centered over the brake rotor
• Structural reinforcement: Provides rigidity necessary for consistent brake performance.
These support plates are precision-formed to withstand the dynamic loads generated by repeated braking and sudden stops - helping maintain consistent brake feel and vehicle safety.
The brake support mounting plate is a structural component that underpins the entire rear brake assembly’s performance. With age, original plates can:
• Corrode or rust, weakening structural integrity
• Bend or distort from impact or over-torque
• Wear at mounting holes, allowing play or misalignment
A compromised mounting plate can lead to brake vibration, uneven pad wear, inconsistent stopping, and noise. Replacing it with a quality OE Match unit restores proper alignment and rigidity - helping ensure repeatable, reliable brake performance and enhanced safety.
When to replace. Replace this brake support mounting plate when:
• There is visible corrosion or rust on the original plate
• The plate shows bends, dents, or distortions
• Brake calipers show uneven wear or misalignment
• You’re performing a rear brake overhaul or suspension service
• Mounting bolts no longer tighten to torque spec due to elongation or wear
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
91135208130
The product you are viewing cross references to these numbers
OEMatch Brake Disc Cover Plates — Stopping Power, Consistent Control
Brake disc cover plates shield brake discs and calipers from road debris, water and dust while helping to manage heat and preserve long-term braking reliability on Porsche models. OEMatch Brake Disc Cover Plates components are compatible replacements engineered to original-spec dimensions and tolerances — a practical option when genuine or OEM parts are unavailable.
Understanding OEMatch Brake Disc Cover Plates
OEM (Original Equipment Manufacturer) parts are made by the same company that produced your Porsche’s original brake disc cover plates. OE (Original Equipment) refers to parts matching original specifications for the brake disc cover plates and may be supplied by alternative manufacturers. Aftermarket parts offer alternative options, sometimes with enhanced features or better value. OEMatch supplies non-OEM brake disc cover plates engineered as direct-fit alternatives to OEM parts, made to original-spec dimensions and tolerances for Porsche models. Typical cover plates are formed from corrosion-resistant steel or aluminium and are shaped to clear caliper bodies, sensors and wheel movement. Correct profiling keeps clearance between rotating and fixed components and helps channel airflow to assist cooling under load.
Benefits Include
- Protects brake discs and calipers from road contaminants and moisture
- Helps manage heat for more consistent braking behaviour
- Reduces corrosion and contamination to support longer component life
Why Brake Disc Cover Plates Wear and Fail
- Corrosion from salt and moisture leading to material loss
- Physical damage from road debris or impact
- Heat-related warping or cracking under thermal cycling
- Bending or displacement caused by incorrect installation or impact
The Importance of Replacing with OEMatch Brake Disc Cover Plates
Replacing damaged or corroded cover plates restores essential protection to the braking system on Porsche models, preventing grit and moisture from accelerating wear of discs and calipers. Renewing these shields supports consistent brake feel, helps maintain cooling paths and reduces the risk of premature component deterioration.
Advantages
- Available in corrosion-resistant steel and aluminium finishes
- Model-specific shaping to match original clearances and mounting points
- Suitable for restoration projects and routine maintenance on Porsche vehicles
Available Types
- Stamped steel backing plates for corrosion resistance
- Pressed aluminium shields for reduced mass
- Model-specific restoration reproductions for classic Porsche applications
Support & Advice
These items affect safety-critical systems. Installation should be carried out by a qualified technician following model-specific procedures and torque settings. Use calibrated tools and new fasteners where specified.
