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Porsche // 911 & 912 (1965-1989) // Any
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- Porsche 95B.2 Macan Petrol 2.0L (245Bhp) 2019-21
The BOSCH Impulse Sender, Crankshaft is a engine management sensor, designed to monitor the exact position and rotational speed of the crankshaft. Often referred to as a crankshaft position sensor, this impulse sender provides critical timing information to the engine control unit (ECU), allowing precise control of fuel injection, ignition timing, and overall engine operation.
Fits:
- Porsche 95B.2 Macan Petrol 2.0L (245Bhp) 2019-21
Diagram Ref No 23
Mounted near the crankshaft or flywheel, the sensor detects rotational impulses generated by a trigger wheel and continuously transmits this data to the ECU. It delivers reliable signal accuracy, durability, and seamless integration with Porsche engine management systems.
What This Product Does:
- Monitors crankshaft position and engine speed (RPM)
- Sends precise timing signals to the ECU
- Controls ignition timing and fuel injection sequencing
- Supports smooth engine starting and operation
- Ensures accurate synchronisation of engine management functions
- Helps optimise engine performance, efficiency, and emissions control
Symptoms Of Wear Or Failure:
- Engine cranks but does not start Intermittent stalling while driving
- Engine misfires or rough running Poor acceleration or loss of power
- Extended cranking before the engine starts
- Check engine light illumination
- Erratic tachometer readings
- Stored fault codes relating to crankshaft position or engine speed signals
Why Replacement Matters:
- Restores accurate engine timing information
- Ensures correct ignition and fuel injection operation
- Improves engine starting reliability
- Prevents stalling and intermittent running issues
- Maintains smooth engine performance and drivability
- Supports fuel efficiency and emissions compliance
- Reduces the risk of unexpected breakdowns
- Ensures the ECU receives the accurate data required for optimum engine management
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
95890643302
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)
Fits:
Porsche 911 1974>>1984 (Incl. Turbo)
Only Fits Up To 1974>>1984
For Cars Porsche 911 1985>>1986 3.2L And Porsche 911 Turbo 1985>>1988 Use 91160620901
Diagram Ref No 6
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
91160620900
The product you are viewing cross references to these numbers
- Porsche 911 1984-1986 3.2L
- Porsche 911 1978-1989 3.3L Turbo (930)
Fits:
Porsche 911 1985-86 3.2L
Porsche 911 Turbo 1985-88
915 Gearbox type
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
91160620901
The product you are viewing cross references to these numbers
- Porsche 911 1987-1989 3.2L G50
- Porsche 911 1978-1989 3.3L Turbo (930)
Speed Sensor - G50 Gearbox
Restore accurate vehicle speed measurement and reliable
speedometer operation with this OE Match Speed Sensor for Porsche
911 Carrera models equipped with the G50 gearbox from 1987-1989 and 1989 Porsche 911 turbo models.
Fits:
Mounted on the G50 transmission, the speed sensor monitors gearbox output shaft rotation and generates an electronic signal that is used by the vehicle's speedometer and associated control systems. As one of the key components within the vehicle speed monitoring system, a correctly functioning speed sensor is essential for accurate speed indication and proper operation of related electrical systems.
Manufactured to OE specifications, this direct replacement sensor provides dependable performance and factory-correct fitment for maintenance, fault diagnosis and restoration projects.
What Does the G50 Speed Sensor Do?
The speed sensor measures the rotational speed of the gearbox output shaft and converts this information into an electrical signal.
Its primary functions include:
- Monitoring vehicle road speed
- Operating the speedometer
- Providing vehicle speed information
- Supporting odometer functionality
- Assisting vehicle electrical systems
- Delivering accurate speed readings
- Maintaining factory instrumentation performance
Without a functioning speed sensor, the vehicle's speed indication system cannot operate correctly.
Why Do Speed Sensors Fail?
Speed sensors are exposed to heat, vibration, moisture and years of continuous operation.
Common causes of failure include:
- Internal electronic deterioration
- Heat-related ageing
- Wiring damage
- Corrosion of terminals
- Moisture ingress
- Gearbox contamination
- Physical impact damage
- Age-related component failure
As the sensor ages, signal quality can deteriorate, eventually leading to inaccurate readings or complete failure.
Symptoms of a Faulty Speed Sensor
Common warning signs include:
- Inoperative speedometer
- Erratic speedometer readings
- Intermittent speed display
- Odometer malfunction
- Speedometer needle fluctuation
- Electrical fault diagnosis issues
- Loss of vehicle speed signal
- Dashboard instrumentation faults
In many cases, the speedometer may work intermittently before complete sensor failure occurs.
When Should the Speed Sensor Be Replaced?
Replacement is recommended when:
Diagnosing
speedometer faults
Speed
readings become erratic
The
speedometer stops working
Replacing
damaged wiring
Carrying
out gearbox repairs
Performing
preventative maintenance
Restoring
a Porsche 911 or 911 turbo
Electrical
testing confirms sensor failure
Many Porsche specialists replace ageing sensors when undertaking transmission refurbishment work.
Why Replacement Matters
A functioning speed sensor is important for both safety and vehicle usability.
Benefits of replacement include:
- Accurate speedometer readings
- Reliable odometer operation
- Improved electrical system functionality
- Elimination of intermittent faults
- Enhanced driving confidence
- Reliable vehicle speed monitoring
- Improved restoration quality
- Factory-correct performance
For classic G50-equipped Porsche models, maintaining reliable instrumentation is an important part of preserving the driving experience.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
91160691002
The product you are viewing cross references to these numbers
Electrical plug housing - multiple applications (see below).
Porsche 986 Boxster 1997-04
- Camshaft position sensor
- Throttle valve
- Ignition coil
Porsche 996 Carrera & GT3 1998-05
- Ignition coil
Porsche 964/993 Carrera & Turbo 1994-98
- Crankshaft position sensor
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99965291640
The product you are viewing cross references to these numbers