2021 Honda Ridgeline - Maintenance & Specs
The 2021 Honda Ridgeline belongs to a Honda Ridgeline lineup that Know Your Ride tracks across 7 model years, from 2020 to 2026. Engine options on record include the 3.5L, 3.5L V6. It is configured as all-wheel drive with an automatic (s9). The 2021 sits mid-run, with both earlier (2020) and later (2026) Ridgeline model years also documented.
It takes 0W-20 full synthetic oil, 6.0 qt with a new filter meeting API SP. Fluid specs on file include Type 2 coolant, DOT 3 brake fluid, Honda ATF DW-1 transmission fluid. Know Your Ride lists 14 scheduled maintenance items for this vehicle, the earliest interval falling at 7,500 miles. Documented torque values include oil drain plug 29 ft-lb, lug nut 100 ft-lb, spark plug 18 ft-lb.
NHTSA complaints for this vehicle cluster around exterior lighting (13), engine (12), unknown or other (9). A representative report reads: "I was involved in a rear end collision earlier today. My vehicle sustained significant front end damage and the air bags did not deploy. The vehicle had to be..." There are 5 safety recalls on record; one covers: Honda (American Honda Motor Co.) is recalling certain 2021 Accord Sedan, Accord Hybrid, CR-V, Ridgeline, 2022 Insight and CR-V Hybrid vehicles. The....
EPA fuel economy is rated at 18 city / 24 highway MPG, 21 MPG combined. Estimated annual fuel cost is about $2,100.
Quick Specs
| Oil viscosity | 0W-20 |
| Oil type | Full Synthetic |
| Oil capacity (w/ filter) | 6.0 qt |
| OEM oil spec | API SP |
| EPA combined | 21 MPG |
| Tire size | 265/70R17 |
| Coolant | Type 2 |
| NHTSA overall | 5 / 5 stars |
| Open recalls on record | 5 |
| Technical service bulletins | 70 |
Common Trouble Codes
- P0300 - Random/Multiple Cylinder Misfire Detected
- P0420 - Catalyst System Efficiency Below Threshold (Bank 1)
- P0171 - System too Lean (Bank 1)
- P0128 - Insufficient Coolant Temperature for Stable Operation
- P0442 - Evaporative Emission Control System Leak Detected (small leak)
- P0455 - Evaporative Emission Control System Leak Detected (gross leak)
- P0700 - Transmission Control System Malfunction
- P0301 - Cylinder 1 Misfire Detected
- U0100 - Lost Communication With ECM/PCM A
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Part of the free Know Your Ride vehicle maintenance reference. Figures are sourced from EPA, NHTSA and manufacturer data and are for general reference - always confirm with your owner's manual.