2021 Honda Ridgeline Maintenance Schedule
Manufacturer-recommended service intervals for the Maintenance Minder and open recall alerts for your 2021 Honda Ridgeline.
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How Honda schedules service: Maintenance Minder
Honda vehicles use the Maintenance Minder system — your dashboard displays a Code A (oil change) or Code B (oil change plus inspections) along with sub-codes 1-6 for additional services. Intervals adjust based on how you drive. The schedule below reflects Honda's underlying targets.
6 Open Recalls
Source: NHTSASEAT BELTS:REAR/OTHER:RETRACTOR
Campaign #21V900000 · 18/11/2021
SEAT BELTS:REAR/OTHER:RETRACTOR
Campaign #21V900000 · 18/11/2021
Issue: Honda (American Honda Motor Co.) is recalling certain 2021 Accord Sedan, Accord Hybrid, CR-V, Ridgeline, 2022 Insight and CR-V Hybrid vehicles. The automatic locking retractor on the second-row center seat belt assembly may deactivate improperly, which can result in an unsecured child restraint system. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard number 208, "Occupant Crash Protection."
Risk: An unsecured child restraint system can increase the risk of injury during a crash.
Fix: Dealers will replace the second-row center seat belt assembly, free of charge. Owner notification letters were mailed January 14, 2022. Owners may contact Honda customer service at 1-888-234-2138.
VISIBILITY:REARVIEW MIRRORS/DEVICES:EXTERIOR
Campaign #23V174000 · 16/03/2023
VISIBILITY:REARVIEW MIRRORS/DEVICES:EXTERIOR
Campaign #23V174000 · 16/03/2023
Issue: Honda (American Honda Motor Co) is recalling certain 2020-2021 Pilot and Ridgeline, and 2020-2022 Passport and Odyssey vehicles. The heating pads behind both side-view mirrors may not be bonded properly, allowing the mirror glass to detach. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard number 111, "Rear Visibility."
Risk: Detached mirror glass can reduce driver visibility, increasing the risk of a crash.
Fix: Dealers will replace both left and right side-view mirrors, free of charge. Owner letters were mailed January 17, 2024. Owners may contact Honda customer service at 1-888-234-2138. Honda's number for this recall is FE5.
SERVICE BRAKES, HYDRAULIC:FOUNDATION COMPONENTS:MASTER CYLINDER
Campaign #23V458000 · 29/06/2023
SERVICE BRAKES, HYDRAULIC:FOUNDATION COMPONENTS:MASTER CYLINDER
Campaign #23V458000 · 29/06/2023
Issue: Honda (American Honda Motor Co.) is recalling certain 2020-2021 Civic, 2020-2023 Ridgeline, 2021-2023 Passport, 2021-2022 Pilot, and 2020 Acura MDX vehicles. The tie rod fastener that connects the brake booster and the brake master cylinder may have been improperly assembled during manufacturing, which can cause the brake master cylinder to separate from the booster assembly.
Risk: Brake master cylinder separation can cause a loss of brake function and increase the risk of a crash.
Fix: Dealers will inspect and repair the brake booster assembly as necessary, free of charge. Owner notification letters were mailed August 7, 2023. Owners may contact Honda customer service at 1-888-234-2138. Honda's numbers for this recall are VEU, AEV, and ZET.
AIR BAGS:SENSOR:OCCUPANT CLASSIFICATION:FRONT PASSENGER
Campaign #24V064000 · 01/02/2024
AIR BAGS:SENSOR:OCCUPANT CLASSIFICATION:FRONT PASSENGER
Campaign #24V064000 · 01/02/2024
Issue: Honda (American Honda Motor Co.) is recalling certain 2020-2022 Pilot, Accord, Civic sedan, HR-V, Odyssey, 2020 Civic coupe, Fit, 2021-2022 Civic hatchback, 2021 Civic Type R, Insight, 2020-2021 CR-V, CR-V Hybrid, Passport, Ridgeline, Accord Hybrid, 2020 Acura MDX, 2022 Acura MDX, 2020-2022 Acura RDX, and 2020-2021 Acura TLX vehicles. The front passenger seat weight sensor may crack and short circuit, failing to suppress the air bag as intended.
Risk: An air bag that deploys unintentionally during a crash can increase the risk of injury.
Fix: Dealers will replace the seat weight sensors, free of charge. Owner notification letters were mailed March 28, 2024, October 18, 2024, and August 2025. This is a phased recall. Owners may contact Honda customer service at 1-888-234-2138. Honda's numbers for these recalls are XHP and VHQ.
BACK OVER PREVENTION: SENSING SYSTEM: CAMERA
Campaign #24V321000 · 09/05/2024
BACK OVER PREVENTION: SENSING SYSTEM: CAMERA
Campaign #24V321000 · 09/05/2024
Issue: Honda (America Honda Motor Co) is recalling certain 2020-2024 Ridgeline vehicles. The rearview camera (RVC) tailgate wire harness may fatigue and break, which can prevent the rearview camera image from displaying.
Risk: A rearview camera that does not display an image can reduce the driver's rear view, increasing the risk of a crash.
Fix: Dealers will replace the RVC tailgate wire harness, free of charge. Owner letters were mailed November 8, 2024. Owners may contact Honda service at 1-888-234-2138. Honda's number for this recall is YI7.
AIR BAGS:SENSOR:OCCUPANT CLASSIFICATION:FRONT PASSENGER
Campaign #26V332000 · 21/05/2026
AIR BAGS:SENSOR:OCCUPANT CLASSIFICATION:FRONT PASSENGER
Campaign #26V332000 · 21/05/2026
Issue: Honda (American Honda Motor Co.) is recalling certain 2018-2021, 2023 Acura TLX, 2019-2024 RDX, 2017-2020, 2022-2026 MDX, 2017-2021, 2023, 2025 Honda Ridgeline, 2017-2022 Pilot, 2019-2021 Passport, 2018-2026 Odyssey, 2019-2022 Insight, 2019-2021 HR-V, 2018-2020 Fit, 2020-2022 CR-V Hybrid, 2017-2022 CR-V, 2017-2018, 2021 Civic Type R, 2017-2021 Civic hatchback, 2016-2020 Civic coupe, 2016-2022 Civic, 2017-2022 Accord Hybrid, and 2016-2022 Accord vehicles. The front passenger seat weight sensor may crack and short circuit, which can cause the air bags to deploy unintentionally during a crash.
Risk: Air bags that deploy unintentionally during a crash increase the risk of injury.
Fix: Dealers will replace the seat weight sensors, free of charge. Owner notification letters are expected to be mailed July 6, 2026. Owners may contact Honda's customer service at 1-888-234-2138. Honda's numbers for this recall are BOL, WO9, OOA, WOM, XOH, NOC, POD, BOE, UOF, POB, EOG, AOI, QO8, TOJ, DO7, and SOK. This recall expands previous NHTSA recall number 24V064. Vehicle Identification Numbers (VINs) involved in this recall will be searchable on NHTSA.gov beginning May 29, 2026.
Essential maintenance
Critical for safety and preventing major damage
Engine Oil & Filter (Code A)
Every 7,500 miReplace 0W-20 full-synthetic oil and filter. The Maintenance Minder triggers Code A between 7,500 and 10,000 miles depending on driving conditions.
Estimated cost — typical U.S. ranges
Dealer
~$120–$160
Shop
~$85–$115
DIY
~$25–$55
Full synthetic costs more than conventional. 5-quart 0W-20 + filter is the typical bill.
Tire Rotation (Sub-code 1)
Every 7,500 miRotate tires front-to-back to even out wear. Honda triggers Sub-code 1 alongside every other oil change.
Estimated cost — typical U.S. ranges
Dealer
~$85
Shop
~$60
DIY
Free
Often free at the shop where you bought the tires — worth asking before paying.
Brake Inspection (Code B)
Every 15,000 miInspect brake pads, rotors, and parking brake. Code B includes a multi-point inspection of brakes, suspension, and fluids.
Estimated cost — typical U.S. ranges
Dealer
~$85
Shop
~$60
DIY
Free
Most shops do this free as a courtesy with any service. Don't pay separately if you can avoid it.
Brake Fluid (Sub-code 5)
Every 45,000 miReplace DOT 3 brake fluid every 3 years regardless of mileage to prevent moisture absorption and corrosion of ABS components.
Estimated cost — typical U.S. ranges
Dealer
~$180–$200
Shop
~$125–$140
DIY
~$10–$25
DOT 3 or 4 — match the cap. Vacuum bleeders make this a one-person DIY.
Important maintenance
Keeps your vehicle running smoothly and efficiently
Automatic Transmission / CVT Fluid (Sub-code 3)
Every 30,000 miReplace ATF or CVT fluid. Honda CVT models (Civic, HR-V, Accord LX) use Honda HCF-2 — do not substitute. The Maintenance Minder triggers earlier under heavy stop-and-go.
Estimated cost — typical U.S. ranges
Dealer
~$330–$500
Shop
~$235–$355
DIY
~$60–$180
Some sealed transmissions have no dipstick — fill is precise and best left to a shop. Many drivers can still DIY drain-and-fill.
Rear Differential Fluid (AWD models, Sub-code 5)
Every 30,000 miAWD CR-V, Pilot, Passport, Ridgeline: replace rear diff fluid every 30,000 miles, sooner if towing.
Estimated cost — typical U.S. ranges
Dealer
~$150–$195
Shop
~$105–$135
DIY
~$20–$50
Drain plug + fill plug — straightforward DIY. AWD vehicles have two; budget for both.
Engine Air Filter (Sub-code 4)
Every 30,000 miReplace the engine air filter every 30,000 miles. Honda uses a long-life cellulose element on most port-injected engines.
Estimated cost — typical U.S. ranges
Dealer
~$60–$95
Shop
~$45–$70
DIY
~$15–$40
5-minute job on most cars; the airbox lid usually has clips, no tools needed.
Spark Plugs (Sub-code 6)
Every 105,000 miHonda uses iridium-tipped plugs rated for 100,000+ miles. Replace at 105,000 miles or whenever Sub-code 6 displays.
Estimated cost — typical U.S. ranges
Dealer
~$285–$390
Shop
~$200–$275
DIY
~$25–$100
Iridium plugs cost more but last 100k+ miles. V6/V8 access varies wildly — some are tough.
Engine Coolant (Sub-code 5)
Every 60,000 miHonda Long-Life Type 2 (blue) coolant: first change at 120,000 miles, then every 60,000 miles. Do not mix with other coolant types.
Estimated cost — typical U.S. ranges
Dealer
~$285–$330
Shop
~$200–$235
DIY
~$25–$60
Use the manufacturer-specified coolant — wrong color/chemistry can damage the cooling system.
Recommended maintenance
Extends the life of your vehicle and improves comfort
Cabin Air Filter (Sub-code 3)
Every 15,000 miReplace the cabin air filter — accessible behind the glove box on most Hondas. Honda recommends 15,000 miles in dusty conditions, longer in clean climates.
Estimated cost — typical U.S. ranges
Dealer
~$60–$95
Shop
~$45–$70
DIY
~$15–$40
Usually behind the glovebox. Shops charge labor for a 10-minute job — easy DIY win.
Valve Clearance Adjustment (Sub-code 6)
Every 105,000 miInspect and adjust valve clearances at 105,000 miles. Critical on K-series and L-series engines to prevent valve recession.
Estimated cost — typical U.S. ranges
Dealer
~$495–$535
Shop
~$345–$375
DIY
Pro only
Mechanical-bucket valvetrains (many Honda 4-cyls, older Toyotas) need this. Hydraulic lifters don't. Shop work — feeler-gauge precision required.
Timing Chain — No Replacement
On condition / lifetimeModern Honda engines (K-series, L-series, R-series, plus all Earth Dreams 1.5T and 2.0T) use a timing chain designed to last the life of the engine. No scheduled replacement.
Estimated cost — typical U.S. ranges
Dealer
~$85
Shop
~$60
DIY
Pro only
Timing chains are normally lifetime. Listen for rattle on cold start — that's the actionable signal. Replacement is major work, quote separately.
Known issues for this vehicle
What drivers and federal regulators have officially reported about the 2021 Honda Ridgeline.
4 active NHTSA investigations
Source: NHTSANo Restart After Auto Start/Stop Engages
Action #EA25004 · opened Mar 26, 2025
On June 3, 2022, the Office of Defects Investigation (ODI) opened Preliminary Evaluation PE22005 after the agency received VOQs and several field reports concerning the Auto Idle Stop (AIS) feature on 2016-2019MY Honda Pilot vehicles. The complaints allege that the engine fails to r…
No Restart After Auto Start/Stop Engages
Action #EA25004 · opened Mar 26, 2025
On June 3, 2022, the Office of Defects Investigation (ODI) opened Preliminary Evaluation PE22005 after the agency received VOQs and several field reports concerning the Auto Idle Stop (AIS) feature on 2016-2019MY Honda Pilot vehicles. The complaints allege that the engine fails to r…
No Restart After Auto Start/Stop Engages
Action #EA25004 · opened Mar 26, 2025
On June 3, 2022, the Office of Defects Investigation (ODI) opened Preliminary Evaluation PE22005 after the agency received VOQs and several field reports concerning the Auto Idle Stop (AIS) feature on 2016-2019MY Honda Pilot vehicles. The complaints allege that the engine fails to r…
No Restart After Auto Start/Stop Engages
Action #EA25004 · opened Mar 26, 2025
On June 3, 2022, the Office of Defects Investigation (ODI) opened Preliminary Evaluation PE22005 after the agency received VOQs and several field reports concerning the Auto Idle Stop (AIS) feature on 2016-2019MY Honda Pilot vehicles. The complaints allege that the engine fails to r…
Reported to NHTSA
NHTSA has 94 complaints on file for the 2021 Honda Ridgeline (2021-04 → 2026-05). We haven't reviewed and grouped them yet for this specific YMM — for now, the full list lives on NHTSA.
Top reported components: ENGINE (25) · UNKNOWN OR OTHER (14) · EXTERIOR LIGHTING (14)
Note: NHTSA also opened 1 defect investigation on this vehicle that closed without action.
Issues on other model years
Source: NHTSA Office of Defects Investigation (ODI). Complaint data refreshed Jun 13, 2026. Investigation data refreshed Jun 13, 2026.
We display NHTSA's record with attribution; we don't editorialize on what these complaints mean for any specific vehicle.
Typical U.S. ranges. Actual quotes vary by shop, parts choice, and vehicle condition.
How we estimate: Dealer = OEM parts × 1.4 + labor × $165/hr. Shop = parts + labor × $115/hr. DIY = parts only.
This maintenance schedule for the 2021 Honda Ridgeline reflects Honda's published service intervals and the Maintenance Minder system. Your actual service needs may vary based on driving conditions, climate, and vehicle usage. Always consult your owner's manual for model-specific recommendations.