Continental 66550 Engine Coolant Bypass Hose
OE Quality 60-Day Returns
Continental
 Molded

Continental 66550 Engine Coolant Bypass Hose

Brand Continental 66550
Position Engine To Pipe, Lower - Connector To Radiator, Lower - Pipe To Pipe, Lower - Pipe To Radiator, Upper - Radiator To Tee-1, Lower - Tee-1 To Tee-2, Upper - Pipe To Radiator, Lower - Engine To Pipe, Pipe To Engine, Upper - Pipe To Engine, Upper - Pipe To Pipe, Lower, and Lower - Radiator To Adapter
Hose 1 Inside Diameter 1.190
Hose 1 Length 10.710
End 2 Hose Inside Diameter 1.190
Product line Molded
Fits Acura, Audi, Chevrolet, Honda, Hyundai, INFINITI, Kia, Mercedes-Benz, Nissan, Toyota, and Volvo · 125 vehicles

OE exact configuration. Molded coolant bypass hose for a direct replacement fit.

EPDM construction. Tube, cover, and synthetic reinforcement meet SAE 20R4EC Class D1 specs.

Coolant transfer hose. Moves glycol-based coolant through the cooling system.

Cross-references Dayco 70112, FEL-PRO 8632 and Gates 21942 for the same application. See all 10.

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Not what you need? See all Engine Coolant Bypass Hose options

Engine Coolant Bypass Hose for OE Fit

Continental 66550 is a molded engine coolant bypass hose built for direct replacement in vehicles that use a 1.190-inch coolant connection. Its exact OEM configuration supports a precise fit, while the EPDM tube and cover with synthetic reinforcement meet or exceed SAE 20R4EC Class D1 requirements.

Use this hose when you need a formed coolant bypass line that matches the original routing on applications such as Honda Passport, Honda Pilot, Honda Ridgeline, and Acura MDX. Continental molded hose construction helps maintain proper coolant flow through the cooling system.

Key Features

  • Part number 66550
  • Molded engine coolant bypass hose for OE-style routing
  • 1.190-inch inside diameter at both ends
  • 10.710-inch hose length
  • EPDM tube and cover with synthetic reinforcement
  • Meets or exceeds SAE 20R4EC Class D1 specifications
  • Exact OEM configuration for direct-fit replacement

Product Details

Continental Molded 66550 is engineered to transfer glycol-based coolant throughout the vehicle’s cooling system. The formed shape supports the original hose path, which is important on tight engine bays and factory coolant layouts. This part number 66550 is a direct replacement choice for drivers servicing Honda Passport, Honda Pilot, Honda Ridgeline, and Acura MDX cooling system repairs.

This part cross-references Gates 21942 and Dayco 70112 for the same application.

Common Problems This Hose Can Address

  • Coolant leakage from a cracked or aged bypass hose
  • Softening, swelling, or collapse of the original hose
  • Improper coolant routing caused by a damaged molded hose
  • Cooling system service needs on Honda Passport, Honda Pilot, Honda Ridgeline, or Acura MDX
  • Loss of coolant circulation through the bypass circuit

Installation Notes

  • Verify hose routing and connection points before installation.
  • Confirm the 1.190-inch end diameters match the vehicle’s fittings.
  • Inspect adjoining pipes, clamps, and radiator necks for wear before reassembly.
  • Use the molded shape to follow the factory path without forcing the hose into position.
  • After installation, refill and bleed the cooling system according to the vehicle service procedure.

Quality Assurance

Continental designs this molded coolant hose to OE configuration standards and material specifications for dependable cooling-system service. The EPDM construction and synthetic reinforcement are built to meet or exceed SAE 20R4EC Class D1 requirements.

Related reading

This part fits 125 vehicles
Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
YearMakeModelSubmodelTransmissionLitersCylindersFuel TypePositionNotes
2025HondaPassport——3.5LV6—Lower - Pipe To RadiatorMolded
2025HondaPilot——3.5LV6—Lower - Radiator To AdapterMolded
2025HondaRidgeline——3.5LV6—Lower - Radiator To AdapterMolded
2024HondaPassport——3.5LV6—Lower - Pipe To RadiatorMolded
2024HondaPilot——3.5LV6—Lower - Radiator To AdapterMolded
2024HondaRidgeline——3.5LV6—Lower - Radiator To AdapterMolded
2023HondaOdyssey——3.5LV6—N/ALower, Radiator to Adaptor; Molded
2023HondaPassport——3.5LV6—Lower - Pipe To RadiatorMolded
2023HondaPilot——3.5LV6—Lower - Radiator To AdapterMolded
2023HondaRidgeline——3.5LV6—Lower - Radiator To AdapterMolded
2022HondaOdyssey——3.5LV6—N/ALower, Radiator to Adaptor; Molded
2022HondaPassport——3.5LV6—N/ALower, Radiator to Adaptor; Molded
2022HondaPilot——3.5LV6—Lower - Radiator To AdapterMolded
2022HondaRidgeline——3.5LV6—Lower - Radiator To AdapterMolded
2021HondaPassport——3.5LV6—N/ALower, Radiator to Adaptor; Molded
2020AcuraMDX——3.5LV6—Lower - Connector To RadiatorMolded
2020HondaOdyssey——3.5LV6—Lower - Pipe To RadiatorMolded
2020HondaPassport——3.5LV6—Lower - Pipe To RadiatorMolded
2020HondaPilot——3.5LV6—Lower - Pipe To RadiatorMolded
2020HondaRidgeline——3.5LV6—Lower - Pipe To RadiatorMolded
2019AcuraMDX——3.0LV6ELECTRIC/GASLower - Connector To RadiatorMolded
2019AcuraMDX——3.5LV6—Lower - Connector To RadiatorMolded
2019HondaOdyssey——3.5LV6—Lower - Pipe To RadiatorMolded
2019HondaPassport——3.5LV6—Lower - Pipe To RadiatorMolded
2019HondaPilot—Automatic3.5LV6—Lower - Pipe To RadiatorMolded
2018AcuraMDX——3.0LV6ELECTRIC/GASLower - Connector To RadiatorMolded
2018AcuraMDX——3.5LV6—Lower - Connector To RadiatorMolded
2018HondaOdyssey——3.5LV6—Lower - Pipe To RadiatorMolded
2018HondaPilot—Automatic3.5LV6—Lower - Pipe To RadiatorMolded
2017AcuraMDX——3.0LV6ELECTRIC/GASLower - Connector To RadiatorMolded
2017AcuraMDX——3.5LV6—Lower - Connector To RadiatorMolded
2017HondaPilot—Automatic3.5LV6—Lower - Pipe To RadiatorMolded
2016AcuraMDX——3.5LV6—Lower - Connector To RadiatorMolded
2016HondaPilot—Automatic3.5LV6—Lower - Pipe To RadiatorMolded
2012HyundaiElantra——2.0LL4—N/ACut to Fit; Molded
2011HyundaiElantra——2.0LL4—N/ACut to Fit; Molded
2011KiaSoul——2.0LL4—N/AMolded
2010HyundaiElantra——2.0LL4—N/ACut to Fit; Molded
2010KiaSoul——2.0LL4—N/AMolded
2010KiaSportage——2.0LL4—N/AMolded
2009HyundaiElantra——2.0LL4—N/ACut to Fit; Molded
2009HyundaiTucson——2.0LL4—N/ACut to Fit; Molded
2009KiaSpectra——2.0LL4—N/AMolded
2009KiaSpectra5——2.0LL4—N/AMolded
2009KiaSportage——2.0LL4—N/AMolded
2008HyundaiElantra——2.0LL4—N/ACut to Fit; Molded
2008HyundaiTiburonGS—2.0LL4—N/ACut to Fit; Molded
2008HyundaiTucson——2.0LL4—N/ACut to Fit; Molded
2008KiaSpectra——2.0LL4—N/AMolded
2008KiaSpectra5——2.0LL4—N/AMolded
2008KiaSportage——2.0LL4—N/AMolded
2007HyundaiElantra——2.0LL4—N/ACut to Fit; Molded
2007HyundaiTiburon——2.0LL4—N/ACut to Fit; Molded
2007HyundaiTucson——2.0LL4—N/ACut to Fit; Molded
2007KiaSpectra——2.0LL4—N/AMolded
2007KiaSpectra5——2.0LL4—N/AMolded
2007KiaSportage——2.0LL4—N/AMolded
2006AudiTT Quattro——3.2LV6—Upper - Radiator To Tee-1Molded
2006AudiTT Quattro——3.2LV6—Lower - Tee-1 To Tee-2Molded
2006HyundaiElantra——2.0LL4—N/AMolded
2006HyundaiTiburon——2.0LL4—N/ACut to Fit; Molded
2006HyundaiTucson——2.0LL4—N/ACut to Fit; Molded
2006KiaSpectra——2.0LL4—N/AMolded
2006KiaSpectra5——2.0LL4—N/AMolded
2006KiaSportage——2.0LL4—N/AMolded
2005AudiTT Quattro——3.2LV6—Upper - Radiator To Tee-1Molded
2005AudiTT Quattro——3.2LV6—Lower - Tee-1 To Tee-2Molded
2005HyundaiElantra——2.0LL4—N/AMolded
2005HyundaiTiburon——2.0LL4—N/ACut to Fit; Molded
2005HyundaiTucson——2.0LL4—N/ACut to Fit; Molded
2005KiaSpectra——2.0LL4—N/AMolded
2005KiaSpectra5——2.0LL4—N/AMolded
2004AudiTT Quattro——3.2LV6—Upper - Radiator To Tee-1Molded
2004AudiTT Quattro——3.2LV6—Lower - Tee-1 To Tee-2Molded
2004HyundaiElantra——2.0LL4—N/AMolded
2004HyundaiTiburon——2.0LL4—N/ACut to Fit; Molded
2004KiaSpectra——2.0LL4—N/AMolded
2003HyundaiElantra——2.0LL4—N/AMolded
2003HyundaiTiburon——2.0LL4—N/ACut to Fit; Molded
2002ChevroletTracker——1.6LL4—Lower - Pipe To PipeCut to Fit; Molded
2002HyundaiElantra——2.0LL4—N/AMolded
2001ChevroletTracker——1.6LL4—Lower - Pipe To PipeCut to Fit; Molded
2001HyundaiElantra——2.0LL4—N/AMolded
2001HyundaiTiburon——2.0LL4—N/ACut to Fit; Molded
2000ChevroletTracker——1.6LL4—Lower - Pipe To PipeCut to Fit; Molded
2000HyundaiElantra——2.0LL4—N/ACut to Fit; Molded
2000HyundaiTiburon——2.0LL4—N/ACut to Fit; Molded
1999HyundaiElantra——2.0LL4—N/ACut to Fit; Molded
1999HyundaiTiburon——2.0LL4—N/ACut to Fit; Molded
1998HyundaiTiburon——2.0LL4—N/ACut to Fit; Molded
1997HyundaiTiburon——2.0LL4—N/ACut to Fit; Molded
1996INFINITIQ45——4.5LV8—Lower - Engine To PipeMolded
1996Mercedes-BenzC280——2.8LL6—N/AMolded
1996Mercedes-BenzE320——3.2LL6—N/AMolded
1996Mercedes-BenzS320——3.2LL6—N/AMolded
1996Mercedes-BenzSL320——3.2LL6—N/AMolded
1995INFINITIQ45——4.5LV8—Lower - Engine To PipeMolded
1995INFINITIQ45——4.5LV8—Pipe To EngineCut to Fit; Molded
1995Mercedes-BenzC280——2.8LL6—N/AMolded
1995Mercedes-BenzE320——3.2LL6—N/AMolded
1995Mercedes-BenzS320——3.2LL6—N/AMolded
1995Mercedes-BenzSL320——3.2LL6—N/AMolded
1994INFINITIQ45——4.5LV8—Lower - Engine To PipeMolded
1994Mercedes-BenzC280——2.8LL6—N/AMolded
1994Mercedes-BenzE320——3.2LL6—N/AMolded
1994Mercedes-BenzS320——3.2LL6—N/AMolded
1994Mercedes-BenzSL320——3.2LL6—N/AMolded
1993INFINITIQ45——4.5LV8—Lower - Engine To PipeMolded
1992INFINITIM30——3.0LV6—Upper - Pipe To RadiatorCut to Fit; Molded
1992INFINITIQ45——4.5LV8—Lower - Engine To PipeMolded
1991INFINITIM30——3.0LV6—Upper - Pipe To RadiatorCut to Fit; Molded
1991INFINITIQ45——4.5LV8—Lower - Engine To PipeMolded
1990INFINITIM30——3.0LV6—Upper - Pipe To RadiatorCut to Fit; Molded
1990INFINITIQ45——4.5LV8—Lower - Engine To PipeMolded
1989ToyotaMR2GT—1.6LL4—Upper - Pipe To PipeMolded
1988Nissan200SX——2.0LL4—Upper - Pipe To EngineCut to Fit; Molded
1988ToyotaMR2GT—1.6LL4—Upper - Pipe To PipeMolded
1987Nissan200SX——2.0LL4—Upper - Pipe To EngineCut to Fit; Molded
1986Nissan200SX——2.0LL4—Upper - Pipe To EngineCut to Fit; Molded
1986ToyotaMR2——1.6LL4—Upper - Pipe To PipeMolded
1986Volvo740——2.3LL4—LowerMolded
1985ToyotaMR2——1.6LL4—Upper - Pipe To PipeMolded
1985Volvo740——2.3LL4—LowerMolded
1985Volvo745——2.3LL4—LowerMolded
1983NissanSentra—Automatic1.7LL4DIESELLower - Engine To PipeCut to Fit; Molded
Directly replaces or cross-references 10 part numbers
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.
Dayco — 70112FEL-PRO — 8632Gates — 2194220260S104511105003195025J6A50195025MRA00305663B007Q1UHSG