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- Porsche 914 (1970-1976)
The OE MATCH Battery Voltage Gauge is a VDO-style electrical gauge designed to provide a clear indication of the vehicle’s battery and charging-system voltage. With an 8–16 volt display range, it allows the driver to monitor electrical system performance from the cockpit and identify abnormal voltage conditions before they develop into starting or reliability problems.
Fits:
- Porsche 914 (1970-1976)
What This Product Does:
The battery voltage gauge acts as a real-time monitor for the vehicle’s electrical system. With the ignition and engine running, it allows the driver to see whether the alternator and charging system are maintaining an appropriate voltage.
When the engine is switched off, the gauge can also provide an indication of battery voltage when the relevant electrical circuit is energised.
Monitoring voltage can help alert the driver to problems involving components such as the:
- Battery
- Alternator
- Voltage regulator
- Charging circuit
- Electrical connections and wiring
Rather than waiting for a weak battery or charging failure to leave the vehicle unable to start, a functioning voltmeter can provide an early visual indication that something in the electrical system requires investigation.
Symptoms Of Wear Or Failure:
Ageing gauges and their internal electrical components can eventually become inaccurate or stop operating altogether. Typical symptoms include:
- Gauge needle not moving
- Needle permanently reading too high or too low
- Voltage reading that appears obviously inaccurate
- Intermittent or fluctuating readings unrelated to actual system voltage
- Needle sticking or responding slowly
- Gauge working only occasionally
- Internal or electrical failure
- Physical damage to the gauge face, needle or housing
- Faded or difficult-to-read markings
- Poor illumination, where applicable
Before replacing the gauge, wiring, earth connections and actual battery voltage should also be checked, as an unusual reading can indicate a genuine charging-system problem rather than a faulty instrument.
Why Replacement Matters:
- A failed or inaccurate voltage gauge removes a useful source of information about the condition of the vehicle’s electrical system.
- If the alternator stops charging correctly, battery voltage can gradually fall until there is insufficient electrical power to operate the vehicle reliably or restart the engine. Conversely, excessive charging voltage may indicate a regulator or charging-system fault that should be investigated.
- Replacing a defective gauge restores the driver's ability to monitor voltage at a glance, providing useful advance warning of potential battery or charging issues.
- For classic vehicles, reliable electrical monitoring can be particularly valuable because ageing wiring, connectors, grounds, alternators and voltage regulators may all contribute to charging-system problems.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
91464111510
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 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 928S2 4.7L 1984-86
- Porsche 928S4 5.0L 1987-92
Fits:
Porsche 928 1983 - 1988
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
92864194902
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
- Porsche 911 1975-1977 3.0L Turbo (930)
- Porsche 911 1978-1989 3.3L Turbo (930)
- 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 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
Internal Odometer Speedometer Gear - Multiple Tooth Count Options
Restore the operation of your classic Porsche speedometer with this OE Match Internal Odometer Speedometer Gear. Manufactured to replace the original internal plastic drive gear, this component restores the mechanical drive to the odometer and trip meter when the original gear has become worn, brittle or broken.
The internal odometer gear is housed within the speedometer and transfers drive from the speedometer mechanism to the odometer assembly. Over time, the original plastic gear naturally deteriorates through age and repeated use, often causing the odometer and trip meter to stop recording mileage while the speedometer needle continues to function normally.
Replacing the failed gear is a cost-effective repair that allows you to retain the original speedometer while restoring accurate mileage recording.
Choosing the Correct Gear
There are multiple tooth count options fitted to speedometers. Before ordering, the speedometer must be opened so the original gear can be inspected and the correct tooth count confirmed.
The replacement gear consists of:
- Outer
gear: Always 20 teeth
- Inner gear: Available with 21 to 32 teeth, depending on your speedometer.
If the original gear is too damaged to count accurately, count the teeth on the mating gear instead. Use the following guide to determine the correct replacement:
Teeth on Mating Gear - Required Gear
49 teeth 20 x 21
48 teeth 20 x 22
47 teeth 20 x 23
41 teeth 20 x 29
40 teeth 20 x 30
38 teeth 20 x 32
Please Note:
The speedometer must be dismantled to confirm both the correct gear
style and tooth count before ordering. Ordering without verifying the existing
gear may result in purchasing the incorrect replacement.
Key Features
- Restores odometer and trip meter operation
- Direct replacement for worn or broken internal plastic gears
- Multiple inner tooth count options available
- Outer gear always features 20 teeth
- Cost-effective alternative to replacing the complete speedometer
- Ideal for instrument restoration and repair
The original instruments fitted to early Porsche models are built to last, but one of the few components that commonly fails is the small internal plastic odometer drive gear. Heat, age and decades of continuous operation eventually make the original material brittle, causing the gear teeth to crack or strip.
Fortunately, replacing the damaged gear restores normal operation while allowing you to retain your original factory instrument.
Common Symptoms of a Failed Odometer Gear
- Speedometer needle operates normally
- Odometer has stopped recording mileage
- Trip meter no longer advances
- Intermittent odometer operation
- Broken or cracked plastic gear inside the speedometer
Because Porsche used several different gear ratios throughout production, identifying the correct gear before ordering is essential for a successful repair.