Genuine Honda distance collar 36.5×42×29 – 23918-P21-010

Honda 23918-P21-010 distance collar (36.5×42×29)

Genuine Honda distance collar 23918-P21-010 for manual transmissions. In Honda documentation this part is described as “Collar, Distance (36.5X42X29) (0.07–0.09)”. It sits on the gearbox output shaft and keeps the correct position of bearings and gears, ensuring proper preload and quiet, smooth gearbox operation. Ideal both for OEM rebuilds and performance refresh of classic VTEC drivetrains.

Dimensions and specification

• Manufacturer: Honda (genuine part)
• Part number: 23918-P21-010
• Official name: Collar, Distance (36.5X42X29) (0.07–0.09)
• Type: gearbox output shaft distance collar / spacer
• Dimensions: 36.5 × 42 × 29 mm
• Application: manual transmissions (MT)
• Material: hardened, precision-machined steel

Applications – Honda manual gearboxes

The distance collar 23918-P21-010 is used in many Honda manual gearboxes from the 1990s and 2000s, especially with VTEC engines. Main applications:

• Honda Accord – 4D 1992–2002, 5D 1999–2002, Aerodeck 1994–1997, Coupe 1992–2002, Wagon 1992–1997
• Honda Ballade – 1997–2000
• Honda Civic:
  • 3D 1992–2000 – engines B16A2
  • 4D 1992–2000 – engines B16A2
  • 5D 1997–1999 – engines B18C4
  • Aerodeck 1998–1999 – engines B18C4
  • Coupe 1999–2000 – engines B16A2
  • CRX 1992–1997 – engines B16A2
• Honda CR-V – 1998–2001 (MT)
• Honda FR-V – 2005–2006 1.7 petrol (MT)
• Honda HR-V – 1999–2005 (MT)
• Honda Integra – 3D 1998–2000 B18C6, 4D 1992–1999
• Honda Prelude – 1992–2001
• Honda Stream – 2001–2005 1.7 petrol (MT)

If you are not sure whether this distance collar fits your gearbox, send us your VIN or gearbox code – we will verify compatibility before you order.

When is it worth replacing the distance collar?

• During a full manual gearbox rebuild (bearings, synchronisers, seals)
• After gear or shaft damage, when the transmission is already disassembled
• In high-mileage cars with noticeable gearbox whine or excessive shaft play
• On performance builds, where correct preload and alignment are critical

FAQ – Honda distance collar 23918-P21-010

Is this an original Honda part?
Yes, it is a genuine Honda distance collar with part number 23918-P21-010, as used in factory-built gearboxes.

Which engines is this collar most commonly used with?
Mainly with engines B16A2, B18C4, B18C6 and several 1.7 petrol units listed above (Accord, Civic, Integra, Prelude, CR-V, HR-V, FR-V, Stream).

What else should I replace together with this distance collar?
In practice it is usually changed together with shaft bearings, synchroniser rings, seals and fresh gearbox oil, to restore full transmission reliability.