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- Accessories
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Brake Light Switch
Sold each.
Fits:
Porsche 911 1986-89
Click 'Zoom in' for large parts diagram.
Diagram ref no 23
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
113945515H
The product you are viewing cross references to these numbers
- Porsche 911 1984-1986 3.2L
- Porsche 911 1987-1989 3.2L G50
- Porsche 911 1978-1989 3.3L Turbo (930)
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12 Month Warranty
Worldwide Delivery
Sold each.
Fits:
Porsche 911 1986-89
Click 'Zoom in' for large parts diagram.
Diagram ref no 23
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
113945515H
The product you are viewing cross references to these numbers
- Porsche 911 1984-1986 3.2L
- Porsche 911 1987-1989 3.2L G50
- Porsche 911 1978-1989 3.3L Turbo (930)
Shop Securely
12 Month Warranty
Worldwide Delivery
Express Delivery
Sold each.
Fits:
Porsche 911 1986-89
Click 'Zoom in' for large parts diagram.
Diagram ref no 23
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
113945515H
The product you are viewing cross references to these numbers
- Porsche 911 1984-1986 3.2L
- Porsche 911 1987-1989 3.2L G50
- Porsche 911 1978-1989 3.3L Turbo (930)
Shop Securely
12 Month Warranty
Worldwide Delivery
Express Delivery
Fits into the Brake master cylinder
Fits:
Porsche 911 1974-86
Porsche 924 1976-80
Porsche 928 1978-95
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
113945515G
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 1975-1977 3.0L Turbo (930)
- Porsche 911 1978-1989 3.3L Turbo (930)
- Porsche 924 2.0L 1976-79
- Porsche 924 2.0L 1980-85
- Porsche 924 Turbo 2.0L 1979-81
- Porsche 928 4.5L 1978-82
- Porsche 928S 4.7L 1981-83
- Porsche 928S2 4.7L 1984-86
- Porsche 928S4 5.0L 1987-92
- Porsche 928GT 5.0L 1989-91
- Porsche 928GTS 5.4L 1992-95
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12 Month Warranty
Worldwide Delivery
Fits into the Brake master cylinder
Fits:
Porsche 911 1974-86
Porsche 924 1976-80
Porsche 928 1978-95
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
113945515G
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 1975-1977 3.0L Turbo (930)
- Porsche 911 1978-1989 3.3L Turbo (930)
- Porsche 924 2.0L 1976-79
- Porsche 924 2.0L 1980-85
- Porsche 924 Turbo 2.0L 1979-81
- Porsche 928 4.5L 1978-82
- Porsche 928S 4.7L 1981-83
- Porsche 928S2 4.7L 1984-86
- Porsche 928S4 5.0L 1987-92
- Porsche 928GT 5.0L 1989-91
- Porsche 928GTS 5.4L 1992-95
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12 Month Warranty
Worldwide Delivery
Express Delivery
Fits:
Porsche 911 2.0-3.3 01/63-07/89
Porsche 914 1.7-2.0 01/69-02/76
Diagram ref no 76
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
91161341101
The product you are viewing cross references to these numbers
- 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)
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12 Month Warranty
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Restore reliable brake light operation with this OE Match Brake Light Switch. Designed for compatible Porsche applications, the brake light switch is an important electrical component that activates the rear brake lights when the braking system is operated.
Fits:
Porsche 911 01/1963 - 07/1989
Porsche 914 01/1969 - 02/1976
Diagram Ref No 76
Brake lights provide an essential warning to following road users that the vehicle is slowing down or stopping. The switch detects brake operation and completes the electrical circuit required to illuminate the brake lamps. A correctly functioning switch ensures that the lights respond consistently whenever the brakes are applied.
What This Product Does:
- Activates the rear brake lights when the braking system is operated.
- Provides an electrical signal for brake lamp operation.
- Alerts following drivers that the vehicle is slowing or stopping.
- Helps ensure consistent brake light response.
- Switches the brake lamp circuit on and off as required.
- Supports safe communication with other road users.
- Replaces a worn, sticking, damaged or failed brake light switch.
- Helps restore correct operation when brake lights are intermittent.
- Provides an OE-style replacement for compatible Porsche applications.
Symptoms Of Wear Or Failure:
- Brake lights do not illuminate when braking.
- Brake lights operate only intermittently.
- Brake lights illuminate later than expected.
- Excessive brake operation is required before the lights come on.
- Brake lights remain illuminated after the brakes are released.
- Brake lamps flicker or operate inconsistently.
- The switch works when cold but becomes unreliable as the vehicle warms up.
- A known-good bulb does not illuminate despite the rest of the circuit being functional.
- Visible corrosion or damage around the switch or electrical terminals.
- Electrical testing indicates inconsistent or no continuity through the switch.
Why Replacement Matters:
- Brake lights are a critical vehicle safety feature. They provide following drivers with immediate visual warning that the vehicle is braking, giving them additional time to react and reduce speed.
- A failed switch may leave the brake lights completely inoperative, increasing the risk of a following vehicle being unable to recognise that you are slowing down. An intermittent or delayed switch can be similarly problematic because brake light activation may not accurately correspond with braking.
- A switch that remains permanently closed creates a different problem. Continuously illuminated brake lights can prevent following drivers from recognising when the brakes are actually being applied and may also discharge the battery when the vehicle is stationary, depending on the electrical system design.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
91161341101
The product you are viewing cross references to these numbers
- 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)
Shop Securely
12 Month Warranty
Worldwide Delivery
Express Delivery
-
brake fluid reservoir, brake master cylinder 911 1978-83 604-00
-
cruise control 911 1978-83 907-00
-
brake fluid reservoir, brake master cylinder 911 1987-89 604-00
-
cruise control 911 1987 907-00
-
cruise control 911 1988-89 907-01
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brake fluid reservoir and brake master cylinder 911 1984-86 604-00
-
cruise control 911 1984-86 907-00
Ensure road safety and reliable lighting performance with brake light switches from Design911. These small but essential components play a critical role in your Porsche’s safety system — activating the rear brake lights the moment the pedal is pressed, warning following drivers that you’re slowing down or stopping.
What They Are & What They Do
A brake light switch is an electrical sensor mounted on or
near the brake pedal. When you press the pedal, the switch completes an
electrical circuit that illuminates the brake lights and may also signal other
vehicle systems such as cruise control or electronic stability management. A
properly functioning switch ensures instant brake-light activation and safe
communication with other drivers.
Why They Fail
Brake light switches can wear out over time due to repeated
mechanical use, internal corrosion, moisture intrusion, or electrical contact
failure. Exposure to dirt, brake dust, or heat can cause sticking, delayed
response, or total failure. When this happens, the brake lights may fail to
illuminate or stay on constantly, which can trigger dashboard warnings or MOT
test failures.
Why They Should Be Replaced
Replacing a faulty brake light switch restores safe
operation, prevents false warning lights, and maintains compliance with
road-safety regulations. A new, OEM-quality switch ensures precise pedal
response and dependable illumination, helping to protect you and other road
users.
Design911 stocks a full range of genuine Porsche and premium aftermarket brake
light switches, offering accurate fitment, long service life, and reliable
performance across all Porsche models - from classic 911s to modern Taycan and
Macan variants.
Genuine Porsche Brake Light Switches
Factory-original components built to Porsche’s exact
standards for perfect fitment, fast response, and reliable light activation.
Aftermarket Brake Light Switch Replacements
High-quality alternatives that meet or exceed OEM
performance - offering long-term durability and cost-effective reliability.
Mechanical Brake Light Switches
Traditional plunger-type designs used on earlier Porsche
models, offering straightforward operation and easy installation.
Electronic & Sensor-Based Switches
Modern switches integrating electronic sensors for faster
response and communication with onboard systems.
Classic Porsche Brake Light Switches
Authentic replacements for heritage models such as the 356,
911 Classic, and 964 - preserving originality while ensuring safety.
Fittings & Connectors
OEM-grade plugs, mounts, and wiring connectors that
guarantee secure installation and fault-free operation.
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