Vehicle database
HONDA Clarity
First Generation / First generation / 2017-2021 / 5-door fastback sedan / Sedan
North America, Japan, Europe (limited)North America, JapanCoverage: expanded
Year and trim selector
Choose the exact year and trim to see engine, oil and service details.
2017 HONDA Clarity R20A1 (2.0L I4 Atkinson cycle) (FC1)
FC1 / R20A1 (2.0L I4 Atkinson cycle) / 2.0L 4-cylinder Atkinson cycle gasoline engine paired with an electric motor in a plug-in hybrid system. Combines gasoline internal combustion with electric propulsion.
SilverOpen details
Oil type: SAE 0W-20 synthetic oil meeting Honda HTO-06 standardOil capacity: Approximately 3.8 liters service-fill including filter replacementRelated: P0300, P0420, P0171, P0455
2021 HONDA Clarity K20C7 (PHEV)/2.0L M1Z (Fuel Cell) (FC1)
FC1 / K20C7 (PHEV), 2.0L M1Z (Fuel Cell) / Available as Plug-in Hybrid Electric Vehicle (PHEV) with 1.5L I4 Atkinson-cycle engine combined with electric motor, or as Fuel Cell Electric Vehicle (FCEV) with hydrogen fuel cell stack.
SilverOpen details
Oil type: SAE 0W-20 synthetic recommendedOil capacity: Approximately 3.7 liters service fill including filter (PHEV gasoline engine)Related: PHEV drivetrain control modules, Fuel cell system ECU
Engine codes by year
| Year | Trim | Engine codes | Displacement | Fuel system |
|---|---|---|---|---|
| 2017 | technical-profile | R20A1 (2.0L I4 Atkinson cycle) | 1993 cc | Multi-point fuel injection |
| 2021 | technical-profile | K20C7 (PHEV), 2.0L M1Z (Fuel Cell) | 1,496 cc (PHEV), Hydrogen fuel cell stack (FCEV) | PHEV: Direct injection + electric propulsion, FCEV: Hydrogen fuel cell |
Oil capacity by engine
| Year | Engine codes | Oil type | Oil capacity | Fluid |
|---|---|---|---|---|
| 2017 | R20A1 (2.0L I4 Atkinson cycle) | SAE 0W-20 synthetic oil meeting Honda HTO-06 standard | Approximately 3.8 liters service-fill including filter replacement | Honda CVT fluid DW-1 |
| 2021 | K20C7 (PHEV), 2.0L M1Z (Fuel Cell) | SAE 0W-20 synthetic recommended | Approximately 3.7 liters service fill including filter (PHEV gasoline engine) | Honda CVT Fluid (HCF-2) for PHEV model |
Technical specifications
- Engines: R20A1 (2.0L I4 Atkinson cycle), K20C7 (PHEV), 2.0L M1Z (Fuel Cell)
- Transmissions: None (CVT automatic used), Electronically controlled CVT (E-CVT) with fixed gear ratio and hybrid power split, Honda CVT fluid DW-1, No manual; Electronically controlled CVT for PHEV gasoline engine, e-CVT for PHEV model, Honda CVT Fluid (HCF-2) for PHEV model
- Tire sizes: 225/50R17
- Bolt pattern: Verify by exact trim and wheel package
- Wheel torque: Verify by VIN and wheel package
- Battery: Verify by engine, market and equipment package
Fluids and service data
- Engine oil: SAE 0W-20 synthetic oil meeting Honda HTO-06 standard / SAE 0W-20 synthetic recommended
- Transmission fluid: Honda CVT fluid DW-1 / Honda CVT Fluid (HCF-2) for PHEV model
- Coolant: Approximately 6.4 liters (engine and battery coolant combined) / Approximately 7 liters (engine cooling + electric motors cooling circuits)
- Brake fluid: DOT 3 or 4 brake fluid / DOT 3 or higher
Known problems
- Battery capacity degradation over extended use
- Higher complexity hybrid system diagnostics
- Battery degradation over long term usage
- Fuel cell system maintenance (FCEV)