Restore your classic’s instrument cluster with high-precision, heat-resistant replacement gears.
Is your odometer stuck, clicking, or "ghosting" miles? In classic Porsche and VDO-equipped vehicles, the original factory drive gear is made of a soft urethane that chemically breaks down over 20+ years, eventually crumbling into "oatmeal."
Our replacement gears are engineered to exact VDO specifications and 3D-printed in ASA (Acrylonitrile Styrene Acrylate). Unlike original equipment or cheap PLA/PETG replacements, ASA is automotive-grade, UV-resistant, and capable of withstanding the extreme high-heat environment of a vehicle dashboard (up to 100°C/212°F) without warping or softening.
How to Choose Your Gear
VDO used different tooth counts to calibrate odometers for Miles (MPH) vs. Kilometers (KM). To ensure your odometer records distance accurately, you must match the tooth count of your original gear.
Pro-Tip: If your original gear has crumbled, count the teeth on the Partner Gear (the large gear it meshes with) to determine the correct replacement.
GEAR SELECTION GUIDE
20x21 (Miles): Standard for 928 models with MILES odometer. Meshes with a 49-tooth partner gear. Small gear diameter: 12.05mm.
20x29 (Kilometres): Standard for 928 models with KM odometer. Meshes with a 41-tooth partner gear. Small gear diameter: 12.05mm.
20x22 (Miles): Fits specific 944/911 variants. Meshes with a 48-tooth partner gear. Small gear diameter: 9.40mm.
20x23 (Kilometres): Meshes with a 47-tooth partner gear. Small gear diameter: 9.65mm.
20x30 (Kilometres): Late-model 911/944 units. Meshes with a 40-tooth partner gear. Small gear diameter: 12.55mm.
20x32 (Kilometres): Meshes with a 38-tooth partner gear. Small gear diameter: 13.40mm.
European Classics
Porsche: 911 (1976-1989), 912E, 914, 924, 928, 930, 944, 964, and 968.
BMW: 3-Series (E30), 5-Series (E28, E34), 6-Series (E24), 7-Series (E23), Z1, and Z3.
Mercedes-Benz: S-Class (W116, W126, W140), E-Class (W123, W124), SL-Class (R107, R129), and G-Wagen (W460, W461, W463).
Audi: 80, 90, 100, 200, 5000, Coupe, and V8 models.
Volvo: 240, 440, 480, 740, 760, 850, and 940.
Exotics: Alfa Romeo (Giulietta, 156), Lamborghini LM002, Maserati (Quattroporte, GranTurismo), Ferrari, and Alpine A310.
Luxury: Bentley and Rolls-Royce (various models from 1966+ using VDO/Jaeger units).
Japanese & American Models
Nissan/Datsun: 260Z, 280Z, 300ZX (Z31), S13 (SX/Silvia), and Micra.
Honda: Civic (early generations).
Mitsubishi: Eclipse (1st Gen).
Specialty: Vixen Motorhomes, Holiday Rambler, and various John Deere/Ford tractors using VDO hour meters.
Product Features:
Engineered for Precision: Matches the standard 17.6mm large-gear diameter used across Porsche 911, 924, 928, 944, and 968 models.
Superior Material: Printed in high-performance ASA for maximum durability and heat resistance.
Optimized Geometry: Our "solid-hub" design eliminates the structural weakness of the original "recessed" moulded parts, preventing gear-face shearing.
Friction Fit: Designed for both a 2mm bore AND 3mm bore for a secure press-fit on the odometer drive shaft.
Please be sure you have the correct spec and measurements before ordering: bore diameter (2mm or 3mm), gear tooth counts e.g. 20×29, and the gear diameters.
Remember the “rule of 70” - if your odometer gear has truly crumbled, count the teeth on its partner gear. The sum of the teeth must be 70, so if that one has 41 teeth, you need a 20×29
Installation Notes:
Clean Thoroughly: Remove every trace of the old, crumbled gear from the odometer housing. Small debris can jam the new gear and cause mechanical failure.
Clean the shaft of any gear residue. I had to scrape mine to get rid of the hard coating left by the gear material and old grease. Add a small amount of lithium grease to the shaft (not the gears).
No Lubrication Needed on the Gears: ASA is self-lubricating against the nylon partner gears; avoid using heavy greases that can attract dust.
Check the Partner Gear: Inspect the white partner gear for hairline cracks in the center bore, as this is a common secondary failure point.
Restore your classic’s instrument cluster with high-precision, heat-resistant replacement gears.
Is your odometer stuck, clicking, or "ghosting" miles? In classic Porsche and VDO-equipped vehicles, the original factory drive gear is made of a soft urethane that chemically breaks down over 20+ years, eventually crumbling into "oatmeal."
Our replacement gears are engineered to exact VDO specifications and 3D-printed in ASA (Acrylonitrile Styrene Acrylate). Unlike original equipment or cheap PLA/PETG replacements, ASA is automotive-grade, UV-resistant, and capable of withstanding the extreme high-heat environment of a vehicle dashboard (up to 100°C/212°F) without warping or softening.
How to Choose Your Gear
VDO used different tooth counts to calibrate odometers for Miles (MPH) vs. Kilometers (KM). To ensure your odometer records distance accurately, you must match the tooth count of your original gear.
Pro-Tip: If your original gear has crumbled, count the teeth on the Partner Gear (the large gear it meshes with) to determine the correct replacement.
GEAR SELECTION GUIDE
20x21 (Miles): Standard for 928 models with MILES odometer. Meshes with a 49-tooth partner gear. Small gear diameter: 12.05mm.
20x29 (Kilometres): Standard for 928 models with KM odometer. Meshes with a 41-tooth partner gear. Small gear diameter: 12.05mm.
20x22 (Miles): Fits specific 944/911 variants. Meshes with a 48-tooth partner gear. Small gear diameter: 9.40mm.
20x23 (Kilometres): Meshes with a 47-tooth partner gear. Small gear diameter: 9.65mm.
20x30 (Kilometres): Late-model 911/944 units. Meshes with a 40-tooth partner gear. Small gear diameter: 12.55mm.
20x32 (Kilometres): Meshes with a 38-tooth partner gear. Small gear diameter: 13.40mm.
European Classics
Porsche: 911 (1976-1989), 912E, 914, 924, 928, 930, 944, 964, and 968.
BMW: 3-Series (E30), 5-Series (E28, E34), 6-Series (E24), 7-Series (E23), Z1, and Z3.
Mercedes-Benz: S-Class (W116, W126, W140), E-Class (W123, W124), SL-Class (R107, R129), and G-Wagen (W460, W461, W463).
Audi: 80, 90, 100, 200, 5000, Coupe, and V8 models.
Volvo: 240, 440, 480, 740, 760, 850, and 940.
Exotics: Alfa Romeo (Giulietta, 156), Lamborghini LM002, Maserati (Quattroporte, GranTurismo), Ferrari, and Alpine A310.
Luxury: Bentley and Rolls-Royce (various models from 1966+ using VDO/Jaeger units).
Japanese & American Models
Nissan/Datsun: 260Z, 280Z, 300ZX (Z31), S13 (SX/Silvia), and Micra.
Honda: Civic (early generations).
Mitsubishi: Eclipse (1st Gen).
Specialty: Vixen Motorhomes, Holiday Rambler, and various John Deere/Ford tractors using VDO hour meters.
Product Features:
Engineered for Precision: Matches the standard 17.6mm large-gear diameter used across Porsche 911, 924, 928, 944, and 968 models.
Superior Material: Printed in high-performance ASA for maximum durability and heat resistance.
Optimized Geometry: Our "solid-hub" design eliminates the structural weakness of the original "recessed" moulded parts, preventing gear-face shearing.
Friction Fit: Designed for both a 2mm bore AND 3mm bore for a secure press-fit on the odometer drive shaft.
Please be sure you have the correct spec and measurements before ordering: bore diameter (2mm or 3mm), gear tooth counts e.g. 20×29, and the gear diameters.
Remember the “rule of 70” - if your odometer gear has truly crumbled, count the teeth on its partner gear. The sum of the teeth must be 70, so if that one has 41 teeth, you need a 20×29
Installation Notes:
Clean Thoroughly: Remove every trace of the old, crumbled gear from the odometer housing. Small debris can jam the new gear and cause mechanical failure.
Clean the shaft of any gear residue. I had to scrape mine to get rid of the hard coating left by the gear material and old grease. Add a small amount of lithium grease to the shaft (not the gears).
No Lubrication Needed on the Gears: ASA is self-lubricating against the nylon partner gears; avoid using heavy greases that can attract dust.
Check the Partner Gear: Inspect the white partner gear for hairline cracks in the center bore, as this is a common secondary failure point.
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