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Porsche // 924 (1977-1988) // Any
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- Porsche 944 2.5L 8V 1982-87
- Porsche 944 2.7L 8V 1988-89
- Porsche 944S 2.5L 16V 1987-88
- Porsche 944S2 3.0L 16V 1989-91
- Porsche 944 Turbo 2.5L 8V 1985-88
- Porsche 944 Turbo 2.5L 8V 1989-91
- Porsche 944 Turbo S 2.5L 8V 1988
- Porsche 968 3.0L 1992-94
- Porsche 968 Sport 3.0L 1994-95
- Porsche 968 CS 3.0L 1993-95
- Porsche 968 Turbo S 3.0L 1993-94
- Porsche 928S2 4.7L 1984-86
- Porsche 928S4 5.0L 1987-92
- Porsche 928GT 5.0L 1989-91
Fits:
Porsche 928 1985-91 - x4 required in total
Porsche 944 1985-91 - Facelift models only, x6 required in total
Porsche 968 1992-95
- 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 964 (911) C2 1989-93
- Porsche 964 (911) C4 1989-93
- Porsche 964 (911) RS 3.6L 1991-93
- Porsche 964 (911) RS 3.8L 1991-93
- Porsche 964 (911) TURBO 3.3L 1991-93
- Porsche 964 (911) TURBO 3.6L 1991-93
- Porsche 993 (911) C2 1994-97
- Porsche 993 (911) C4 1994-97
- Porsche 993 (911) TURBO 1994-96
- Porsche 924 2.0L 1976-79
- Porsche 924 2.0L 1980-85
- Porsche 924 Turbo 2.0L 1979-81
- Porsche 924 Turbo 2.0L 1982-84
- Porsche 924S 2.5L 1986-87
- Porsche 924S 2.5L 1988
- Porsche 928 4.5L 1978-82
- Porsche 928S4 5.0L 1987-92
- Porsche 928GT 5.0L 1989-91
- Porsche 928GTS 5.4L 1992-95
- Porsche 356A 1955-59
- Porsche 356B 1959-63
- Porsche 356C 1963-65
- Porsche 914 (1970-1976)
Price is each
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
PCG631129A
The product you are viewing cross references to these numbers
- Porsche 924 2.0L 1976-79
- Porsche 924 2.0L 1980-85
- Porsche 924 Turbo 2.0L 1979-81
- Porsche 924 Turbo 2.0L 1982-84
- Porsche 924 Carrera GT 2.0L 1981
- Porsche 924 Carrera GTS 2.0L 1982
- Porsche 924S 2.5L 1986-87
- Porsche 924S 2.5L 1988
- Porsche 944 2.5L 8V 1982-87
Fits:
Porsche 924 1976-85 LHD Cars ***not for (J)
Porsche 924S 1986-88 LHD Cars
Porsche 944 1982-85 LHD Cars
Click 'Zoom in' for large parts diagram.
Diagram ref no 5
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
142957801C
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 924 2.0L 1976-79
- Porsche 924 2.0L 1980-85
- Porsche 924 Turbo 2.0L 1979-81
- Porsche 924 Turbo 2.0L 1982-84
- Porsche 924 Carrera GT 2.0L 1981
- Porsche 924 Carrera GTS 2.0L 1982
- Porsche 924S 2.5L 1986-87
- Porsche 924S 2.5L 1988
- Porsche 944 2.5L 8V 1982-87
- Porsche 944 2.7L 8V 1988-89
- Porsche 944S 2.5L 16V 1987-88
- Porsche 944S2 3.0L 16V 1989-91
- Porsche 944 Turbo 2.5L 8V 1985-88
- Porsche 944 Turbo 2.5L 8V 1989-91
- Porsche 944 Turbo S 2.5L 8V 1988
- Porsche 968 3.0L 1992-94
- Porsche 968 Sport 3.0L 1994-95
- Porsche 968 CS 3.0L 1993-95
- Porsche 968 Turbo S 3.0L 1993-94
- Porsche 914 (1970-1976)
Mechanical Odometer Speedometer Gear
Restore the operation of your classic Porsche's odometer
with this OE Match Mechanical Odometer Speedometer Gear.
Fits:
- 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 924 2.0L 1976-79
- Porsche 924 2.0L 1980-85
- Porsche 924 Turbo 2.0L 1979-81
- Porsche 924 Turbo 2.0L 1982-84
- Porsche 924 Carrera GT 2.0L 1981
- Porsche 924 Carrera GTS 2.0L 1982
- Porsche 924S 2.5L 1986-87
- Porsche 924S 2.5L 1988
- Porsche 944 2.5L 8V 1982-87
- Porsche 944 2.7L 8V 1988-89
- Porsche 944S 2.5L 16V 1987-88
- Porsche 944S2 3.0L 16V 1989-91
- Porsche 944 Turbo 2.5L 8V 1985-88
- Porsche 944 Turbo 2.5L 8V 1989-91
- Porsche 944 Turbo S 2.5L 8V 1988
- Porsche 968 3.0L 1992-94
- Porsche 968 Sport 3.0L 1994-95
- Porsche 968 CS 3.0L 1993-95
- Porsche 968 Turbo S 3.0L 1993-94
- Porsche 914 (1970-1976)
This gear is located on the side of the speedometer framework and forms an important part of the internal gear train that drives both the odometer and trip meter. Over time, the original plastic gear can become brittle through age and repeated use, often developing a fine crack around the centre bore where it fits onto the shaft. Once cracked, the gear can no longer grip the shaft correctly, causing it to slip and preventing the odometer from recording mileage accurately.
One of the most common symptoms is that the speedometer needle continues to work normally, while the odometer and trip meter stop counting or operate intermittently.
It is important to note that there are potentially two internal gears that commonly fail within the speedometer. Before ordering, inspect the gear mounted on the side of the speedometer framework.
If your existing gear is metal, this replacement is not required. If your gear is plastic, inspect it carefully around the shaft hole for hairline cracks or signs of slipping. Even a very small crack is enough to cause the gear to fail.To ensure the correct replacement is ordered, the speedometer must be opened and the existing gear inspected. As Porsche used several different gear styles and tooth counts across production, it is always recommended to confirm the original gear before purchasing.
Key Features
- Replaces the plastic gear fitted to the side of the speedometer framework
- Restores odometer and trip meter operation
- Direct replacement for worn or cracked original gears
- Manufactured for precise fit and reliable performance
- Ideal for speedometer restoration and instrument repairs
Always inspect your original gear before ordering Not required if your existing gear is metal
Porsche Mechanical Speedometer & Odometer Repair Parts
The mechanical VDO speedometers fitted to classic Porsche models are renowned for their durability, but after decades of service the internal plastic gears naturally become brittle. One of the most common failures occurs when the gear mounted on the side of the speedometer framework develops a small crack around the centre shaft.
Although the crack is often difficult to see, it prevents the gear from gripping the shaft securely, allowing it to rotate independently instead of driving the odometer mechanism. Replacing the damaged gear restores accurate mileage recording while preserving the originality of your factory instrument.
Common Symptoms of a Failed Mechanical Odometer Gear
- Speedometer needle operates correctly
- Odometer has stopped recording mileage
- Trip meter no longer works
- Intermittent odometer operation
- Gear slips on the shaft
- Hairline crack visible around the centre bore of the plastic gear
Because several different gear designs and tooth counts were used across Porsche production, dismantling the speedometer and inspecting the original gear is essential before ordering a replacement.
- Porsche 924 2.0L 1980-85
- Porsche 924S 2.5L 1986-87
- Porsche 924S 2.5L 1988
- Porsche 944 2.5L 8V 1982-87
Fits:
Porsche 924 1980-85
Porsche 924S 1986-88
Porsche 944 1982-85
Click 'Zoom in' for large parts diagram.
Diagram ref no 27
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
477857977B1DB
The product you are viewing cross references to these numbers