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- Porsche 911 1968-1973 2.2L / 2.4L / 2.7L RS LWB (F)
Fits: Left or Right.
Porsche 911 1972-73
Diagram ref no 4
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
91135208300
The product you are viewing cross references to these numbers
- 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 914 (1970-1976)
This rear brake disc cover plate kit is supplied with cover plates, a retaining bar, and mounting hardware, it restores proper underbody protection to factory standards.
Porsche 914-6 - 1970 to 1976
Diagram Ref No 3, 4, 5 and 6
What it does:
• Shields the rear brake discs from dirt, debris, and road spray
• Helps maintain efficient cooling and protects the rotor surfaces
Over time, the original cover plates can corrode, warpage, or suffer from broken fasteners. A replacement kit restores protection, preserves brake component integrity, and maintains that authentic appearance.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
90135280121
The product you are viewing cross references to these numbers