2018 Honda Clarity
The 2018 Honda Clarity is sold in the U.S. as an electric, plug-in hybrid and hydrogen fuel cell midsize sedan with 3 EPA-rated configurations. Its longest-range version, the Clarity EV, is EPA-rated at 89 miles with 114 MPGe combined efficiency. NHTSA lists 3 recall campaigns for this model year, which gives it a Safety Signal grade of C. Owners have filed 163 complaints, most often about the fuel/propulsion system.

Specs & fuel economy
Source: EPA fueleconomy.gov| Configuration | Powertrain | Drive | Engine / motor | City | Hwy | Comb | Range | kWh/100mi | Charge (240V) | Annual fuel* |
|---|---|---|---|---|---|---|---|---|---|---|
| Clarity EV | Electric | FWD | 120 kW AC PMSM | 126 | 103 | 114 MPGe | 89 mi | 29.5 | 4 h | $650 |
| Clarity Plug-in Hybrid | Plug-in hybrid | FWD | 1.5L 4-cyl + 135kW AC PMSM | 44 | 40 | 42 (76 MPGe blended) | 48 mi electric | 31 | 2.2 h | $1,600 |
| Clarity FCV | Hydrogen fuel cell | FWD | 130 kW AC PMSM | 69 | 67 | 68 | — | — | — | — |
*EPA estimate at 15,000 miles/year at EPA reference fuel and electricity prices. fueleconomy.gov record ids: 40044, 39782, 47529.
Emissions & certification
Source: EPA emission certificates| Configuration | Smog rating | Emission standard | Where it can be sold new | SmartWay |
|---|---|---|---|---|
| Clarity EV, Clarity FCV | 10 / 10 | Federal Tier 3 Bin 0 / California ZEV | All 50 states (federal, all altitudes); California and states following California standards | SmartWay Elite |
| Clarity Plug-in Hybrid | 8 / 10 | Federal Tier 3 Bin 20 / California LEV-III SULEV20 | All 50 states (federal, all altitudes); California and states following California standards | SmartWay Elite |
Certified for all fifty states, so it can be registered new anywhere in the U.S.
The smog rating scores tailpipe pollutants other than greenhouse gases, 1 (worst) to 10 (best), and is comparable only within a model year. The standard is the federal bin or California tier the configuration was certified to. Both come from the EPA certificate behind the window sticker.
Specifications filed with NHTSA
Source: NHTSA vPICDimensions Exterior
| Body style | Sedan/Saloon |
| Doors | 4 |
| GVWR class | Class 1D: 5,001 - 6,000 lb (2,268 - 2,722 kg) |
Engine Basics
| Cylinders | 4 |
| Displacement | 1.5 L |
| Engine configuration | In-Line |
Engine Output
| Horsepower | 103 hp |
Fuel Economy
| Fuel | Compressed Hydrogen/Hydrogen |
Transmission
| Drivetrain | 4x2 |
| Transmission | Continuously Variable Transmission (CVT) |
Filed by the manufacturer with NHTSA under the federal vehicle-identification rule and decoded from the VIN pattern — not a manufacturer press kit, so it describes the configurations we could identify rather than every trim (seen: Electric Touring, Fuel Cell Touring, PHEV, TOURING). Figures for the trim you are looking at may differ.
Dimensions & weight
Source: Transport Canada| Length | 192.9 in |
| Width (body, without mirrors) | 74.8 in |
| Height | 58.3 in |
| Wheelbase | 108.3 in |
| Track, front | 62.2 in |
| Track, rear | 62.6 in |
| Curb weight | 4,063 lb |
| Weight distribution, front/rear | 57/43 |
Measured by Transport Canada for its Canadian Vehicle Specifications database, which covers the North American versions of each model — here one configuration: All versions. Where a range is shown, those versions differ. Width is the body without mirrors, which is why it can read narrower than a brochure figure. Before we used it we checked it against the US manufacturer press kits we hold (27 Sep 2026): wheelbase agreed within 1% on every vehicle we could compare, length on 98%, and the curb weight fell inside the manufacturer's range on 96%. Source dataset. Contains information licensed under the Open Government Licence – Canada. Licence.
Factory warranty running out?
The 2018 Honda Clarity is in the years where high-voltage electronics and module repairs land on the owner. What an extended plan does and does not cover is worth reading before a dealer quotes you one.
What to check before you buy →Affiliate disclosure: some links on this page are affiliate links. If you request a quote or buy through them we may earn a commission at no extra cost to you. Nothing on this page changes because of it.
Recalls (3)
Source: NHTSA recall databaseEquipment
N5HHybrid Propulsion System
A3OThese are vehicle campaigns — the ones the automaker filed against this model. NHTSA also records equipment recalls, filed by a parts maker against a component (a tyre, a child seat, an aftermarket part), and those are not listed here or counted above. nhtsa.gov/recalls shows both for a VIN.
NHTSA defect investigations
Electrical System:Propulsion System — Pedestrian alert sounds closed
NHTSA received a petition on or about July 18, 2022, requesting that Federal Motor Vehicle Safety Standard (FMVSS) 141 be applied to all electric and hybrid vehicles operating in the United States. The petition can be reviewed at NHTSA.gov under ODI Number 11486072. FMVSS 141 establishes performance requirements for pedestrian alert sounds for motor vehicles. The standard applies to hybrid and electric vehicles that have a gross vehicle weight rating of 4,536 KG or less or are defined as low-speed vehicles. The standard became fully applicable to all such vehicles manufactured on or after March 1, 2021. On January 27, 2023, NHTSA opened Defect Petition (DP) 22-005 to evaluate the subject mat
Opened Jan 27, 2023 · closed Aug 7, 2023 · action DP22005 · the investigation’s page →
Whether any of this applies to one specific Clarity
A campaign covers a build range, not a model year, so two identical-looking cars from 2018 can differ. Both of these check a VIN against the manufacturer’s own list, free, in about ten seconds. Honda publishes its own lookup because federal rule 49 CFR 573.15 requires it to, and to keep it current to within seven days.
Hear about a recall before the letter does
The manufacturer’s letter is the last step of a recall: it has up to 60 days after filing to mail owners, at the address on the registration. We email you the day NHTSA posts a recall on the 2018 Honda Clarity, with what to do next. Nothing else, ever — no newsletter, no marketing, one-click unsubscribe in every message.
Parts & accessories for the 2018 Honda Clarity
Search by fitment on eBay Motors — OEM take-offs, aftermarket, and the trim pieces dealers no longer stock. The listing and the price are the seller's.
Find parts for this Clarity →Owner complaints
Source: NHTSA complaint database11 involved a crash · 1 a fire · 3 injuries · 0 deaths reported
65 per 10,000 built · Honda reported 25,171 Clarity built (its Early Warning production report to NHTSA)
Filed per year: 2018: 33 · 2019: 25 · 2020: 11 · 2021: 6 · 2022: 9 · 2023: 10 · 2024: 47 · 2025: 7 · 2026: 15
Most-cited components
In owners' own words
Filed with NHTSA by the people who own these cars, one per problem area. Quoted as written, with anything identifying removed.
I received a notice in the mail last YEAR stating that there was a problem with fuel pump in Honda Clarity and there would be a recall. I cannot get my car serviced. Honda will not respond. A dealer said not safe to drive. And they said they have no idea if they will even have parts this YEAR. Help please
The vehicle exhibits a dangerous electrical defect involving uncontrolled power-cycling. After shutting down the car, it automatically restarts itself in a continuous loop. During these episodes, the dashboard flickers, the drivetrain shudders, and the vehicle becomes unresponsive to manual 'Stop' button or brake inputs.
Since last Wed. (9/24/2025), the car started to show the warnings of "Adaptive Cruise Control Problem", "Brake Hold System Problem", "Brake System Problem", "Electric Parking Brake Problem", and "Road Departure Mitigation System Problem" from time to time.
The steering makes a horrible clunking sound, and is impercice/sloppy. Dealership refused to acknowledge any issue. Increased effort required to stay within lane. Tie rods are not damaged or worn, issue appears to be with steering rack as far as I can tell
I bought this car used with a governmental help from replace my ride program, since I bough the car form a dealer ) within few days, I took it to the dealer twice for thermostat replacement and spark plugs. and recently, There was an extended warranty from Honda for the ac condenser as this car has a major problem with ac.
The engine revs very high and the car dramatically slows down. This has happened three times (including today) in the two years I have owned the car. Once was extremely dangerous as it happened on an Interstate highway when traffic was at highway speeds. We were able to avoid getting in an accident though.
Complaint counts are raw owner reports to NHTSA, not verified defects, and scale with how many were sold. Use them to spot patterns, not to rank.
Reported by Honda itself: 32 death-or-injury claims on this model year in its quarterly Early Warning reports to NHTSA (49 CFR 579.21): 40 injured, as claimed, not verified — about 127 per 100,000 built. Every Clarity model year, by year and system → Dated and by system, they are exhibit F of the defect dossier.
When owners reported it
miles, typically
Half the 66 owner reports with an odometer reading on file fall between 1,000 and 12,000 miles. That is when problems get reported, which is not the same as when they start — and not a failure rate, because nobody knows how many of these cars never had a problem at all.
Median mileage by component
| Component | Reports | Median miles | Vs same age |
|---|---|---|---|
| Engine | 20 | 4,000 | 0.08× |
| Power Train | 14 | 4,418 | 0.13× |
| Fuel/Propulsion System | 14 | 12,650 | 0.4× |
Vs same age is this model year’s median for the system divided by the median of every 2018-model-year complaint about the same system, all makes: under 1× means owners of this car reported it at lower mileage. Here, owners reported earlier than same-age vehicles: engine (0.08×), power train (0.13×), fuel/propulsion system (0.4×). Which systems go early across the whole fleet: the component study.
Odometer readings as filed by owners with NHTSA. Readings under 100 or over 400,000 miles are dropped as data entry rather than history, and a component needs at least 12 readings before a median is shown for it.
Crash ratings
Source: NHTSA NCAPNHTSA has not published 5-Star crash ratings for this model year.
Service bulletins & campaigns
Source: NHTSA manufacturer communications- Term not in NHTSA’s summary · Honda bulletin ONLO9V07062021Owner Notification Letter - On some 2018-21 Clarity Plug-In Hybrid models, the A/C condenser may leak refrigerant.
- Term not in NHTSA’s summary · Honda bulletin A21-017American Honda is extending the warranty on the A/C condenser to 10 years from the original date of purchase with unlimited miles.
The term and the vehicles it covers are the manufacturer’s, as NHTSA’s summary of each filing states them; a dealer checks one particular car by its VIN. Every Honda warranty extension (66) → · Every warranty extension on file, all makes →
Most often about: Electrical System, Fuel/Propulsion System, Visibility/Wiper, Steering, Engine.
- A18-090 Service bulletin2023-11-14 · Electrical System
- Service Bulletin - There is a software problem in the PCM, which may cause the MIL to come on with DTC P26A3 (electric water valve malfunction), DTC P100C (electric VTC motor speed signal circuit malfunction) and/or P0010 (variable valve timing control [VTC] malfunction). There are up to three updates that must be performed on applicable vehicles.
- ONL6CK09212022 Service bulletin2022-09-21 · Electrical System
- Owner's Notification Letter - Product Update - Our records indicate that a Product Update has not been completed on this vehicle (Vehicle Identification Number XXXXXXXXXXXXXXXXX). The software that monitors the temperature in the fuel cell tank may not be up to date. This may cause the vehicle to incorrectly display a hydrogen system warning on the instrument panel and store a system malfunction.
- A22090A Service bulletin2022-09-16 · Electrical System
- Dealer Message - In the event you experience a sub tank wire harness rodent damage on the 2017â2020 Clarity FCV, after repairing / replacing the wire harness, wrap the areas shown below with RODENT DETERRENT TAPE, P/N 4019-2317.
- ONL6PH09152022 Service bulletin2022-09-15 · Fuel System, Gasoline
- Owner's Notification Letter - Our records indicate that a PRODUCT UPDATE has not been completed on this vehicle (Vehicle Identification Number [VIN NUMBER]). On Clarity Plug-in Hybrid vehicles, there is a software error in the miles per gallon calculation, which affects the HV range display and causes it to read unusually high.
- ONLO9V07062021 Service bulletin2021-07-06 · Visibility
- Owner Notification Letter - On some 2018-21 Clarity Plug-In Hybrid models, the A/C condenser may leak refrigerant. American Honda is extending the warranty on the A/C condenser to 10 years from the original date of purchase with unlimited miles. This warranty extension provides coverage for the original owner and any subsequent owners. No action is required on your part unless you experience a pro
- ABOM05282021 Service bulletin2021-05-28 · Visibility
- Dealer Message - Today, May 28, 2021, American Honda is announcing a warranty extension for certain 2018-2020 Accord and Accord Hybrid, 2018-2020 Civic, 2017-2021 Civic Hatch, 2017-2021 Civic Type R, 2018-2021 Clarity PHEV, and 2019-2021 Insight vehicles. This warranty extension covers the A/C condenser to address concerns of leaking refrigerant. American Honda is extending the warranty on the A/C
- A21-017 Service bulletin2021-05-28 · Visibility
- Service Bulletin - American Honda is extending the warranty on the A/C condenser to 10 years from the original date of purchase with unlimited miles. This warranty extension only covers vehicles that have a defective A/C condenser from the factory. The A/C condenser was not manufactured to specification. As a result, corrosion may develop in the form of tiny holes in the condenser tube walls that
- A21-008 Service bulletin2021-02-11 · Power Train — Automatic Transmission — Control Module (Tcm/Pcm/Tecm)
- Service Bulletin - The Hybrid System Failure message comes on the MID, and DTC P1D8D (Generator Motor Inverter Short) is stored.
A service bulletin is the manufacturer telling its dealers how to diagnose or repair a known condition. It is not a recall, not a finding that the vehicle is defective, and the work is not automatically free — though a bulletin is often what a dealer works from when you describe a symptom, so quoting the document number can save a diagnosis. The count is every communication filed; the list shows the most recent, one entry per campaign, because a single campaign is usually filed as several documents on the same day. The summaries are NHTSA's; the full documents come from the manufacturer.
Diagnostic trouble codes on file
Source: NHTSA manufacturer communications and complaintsCodes documented against this model year in the federal record. A code appearing here does not mean this vehicle will set it — it means the code is part of this nameplate-year's documented history.
| Code | What it means | Most often filed under | Where it appears |
|---|---|---|---|
| P0010 | Manufacturer-defined — the meaning is set by the automaker, not the standard. | Electrical System · Battery → | 6 bulletins |
| P100C | Manufacturer-defined — the meaning is set by the automaker, not the standard. | Electrical System · Battery → | 6 bulletins |
| P26A3 | Manufacturer-defined — the meaning is set by the automaker, not the standard. | Electrical System · Battery → | 4 bulletins |
| P1FBF | Manufacturer-defined — the meaning is set by the automaker, not the standard. | Fuel/Propulsion System · Fuel pump → | 2 bulletins |
Generic codes (the second character is 0 or 2) mean the same thing on every vehicle sold in the United States. Manufacturer-specific codes (1 or 3) mean whatever the automaker assigned, and no honest source can define them for you — which is why the ones here carry the evidence instead of a definition. A code is a link when enough separate federal documents name it across the catalogue to be worth a page of its own; the rest are listed here, where the vehicle is the context that makes them mean something.
Affiliate disclosure: some links on this page are affiliate links. If you request a quote or buy through them we may earn a commission at no extra cost to you. Nothing on this page changes because of it.
At the New York inspection station
Source: New York State DMVIn New York’s inspection lanes over the 12 months to Oct 10, 2026, the 2018 Honda Clarity failed the emissions check on 1.7% of first inspections — lower than the 3.0% for every 2018 model-year vehicle inspected; and the safety inspection on 3.0% (every 2018 vehicle: 1.9%).
failed emissions
893 initial inspections of 874 vehicles.
| Measure | The 2018 Clarity | Every 2018 vehicle | Behind it |
|---|---|---|---|
| Failed the emissions check | 1.7% | 3.0% | 892 |
| Failed the safety inspection | 3.0% | 1.9% | 893 |
| Air-bag warning lamp stayed lit | 0.22% | 0.22% | 893 |
| Miles driven a year | 10,239 | 10,002 | odometer at inspection |
| Average odometer | 84,546 | 82,833 | odometer at inspection |
New York’s emissions test on these model years is an on-board diagnostics check: it fails a car whose check-engine light is on or whose self-tests have not finished. First inspections only, so a car that failed and came back is counted once; private and special plates, not taxis, livery or commercial plates. A rate appears only where at least 200 inspections stand behind it. “Every 2018 vehicle” is every 2018 model-year car, SUV and pickup inspected in the same window, all makes. This is the state’s record of test results, not a reliability score by itself. Source: New York State Department of Motor Vehicles, Vehicle Inspections (data.ny.gov, Open NY terms).
Clarity by model year
all years, side by side →Common questions about the 2018 Clarity
Source: EPA, NHTSA and manufacturer press kitsDoes the 2018 Honda Clarity have any recalls?
NHTSA has posted 3 recall campaigns for the 2018 Honda Clarity. The most serious on file is 23V858000, covering Fuel System, Gasoline. Check your own VIN at nhtsa.gov/recalls; a recall applies to specific build ranges, not every car.
How safe is the 2018 Honda Clarity?
NHTSA has not published a crash-test rating for the 2018 Honda Clarity yet. On the recall record WhichTrim grades it C (79/100), which measures open and severe recalls rather than crash protection.
What is the fuel economy of the 2018 Honda Clarity?
Across the 3 EPA-rated configurations of the 2018 Honda Clarity, the best EPA combined figure is 68 mpg (MPGe on the electrified versions) and the longest EPA range is 89 miles on a charge. Figures are the EPA's own, per configuration, and every one is listed above.
What are the dimensions of the 2018 Honda Clarity?
Transport Canada measured it at 192.9 in long, 74.8 in wide (body, without mirrors), 58.3 in tall, on a 108.3 in wheelbase. Curb weight: 4,063 lb. Those are its measurements of the North American versions; every figure is in the table above.
What do owners complain about on the 2018 Honda Clarity?
Owners have filed 163 complaints with NHTSA about the 2018 Honda Clarity, most often about fuel/propulsion system, engine, unspecified. Of those, 11 involved a crash, 1 a fire, 3 reported injuries. Complaints are unverified owner reports, so treat the pattern as a signal and the individual report as an anecdote.
How clean is the 2018 Honda Clarity?
The EPA smog rating for the 2018 Honda Clarity runs 8 to 10 out of 10 across its configurations. That score covers tailpipe pollutants other than greenhouse gases, and it only compares vehicles within the same model year. It is certified for all fifty states, so it can be registered new anywhere in the U.S. Its configurations were certified to different standards — California LEV-III SULEV20, California ZEV, Federal Tier 3 Bin 0, Federal Tier 3 Bin 20 — which the table above lists per configuration.
Are there service bulletins for the 2018 Honda Clarity?
The manufacturer has filed 50 service bulletins and related communications with NHTSA for the 2018 Honda Clarity, most often covering electrical system, fuel/propulsion system, visibility/wiper. The most recent is dated 2023-11-14. A bulletin is not a recall: it is the repair procedure a manufacturer sends its dealers for a condition it knows about, and the work is not automatically paid for. It is still worth knowing — if the symptom matches, quoting the bulletin number at the service desk can save a diagnosis. The document numbers and summaries are listed above.
How does the 2018 Honda Clarity do at state inspection?
In New York’s inspection lanes over the 12 months to Oct 10, 2026, the 2018 Honda Clarity failed the emissions check on 1.7% of first inspections — lower than the 3.0% for every 2018 model-year vehicle inspected; and the safety inspection on 3.0% (every 2018 vehicle: 1.9%). The figures are New York State DMV’s own inspection records, first inspections only, and the table above sets each one against every vehicle of the same model year.
What we hold, and what an empty row means
Paid vehicle-history reports will not tell you the difference between “nothing happened to this car” and “we never received that record” — both of the big two say as much in their own help pages. Most of what is on this page comes from complete federal registers, so we can tell you which is which, row by row.
| Data | Held | Source | What it covers — or what empty means |
|---|---|---|---|
| Fuel economy & configurations | 3 configurations | EPA certification records | Every configuration the EPA certified for sale, with its own test figures. |
| Emission certificates | 3 configurations | EPA emission certificates | Smog rating, standard and the sales area that decides where the car can be sold new. |
| Recalls | 3 | NHTSA recall campaigns | A complete federal register: every campaign covering this model year, with severity and advisory flags. |
| Owner complaints | 163 | NHTSA complaint database | Also complete, but unverified: these are reports owners filed, not findings. Counts scale with how many were sold. |
| Crash ratings | none | NHTSA NCAP | NHTSA has not tested this model year. Cars are selected for testing, so untested is not unsafe. |
| Service bulletins | 50 | NHTSA manufacturer communications | Everything the manufacturer told its dealers about a defect or malfunction, short of a recall. |
| Investigations | 1 | NHTSA Office of Defects Investigation | Open and closed defect investigations, with the agency's own narrative. |
| Driver-assist crash reports | none | NHTSA Standing General Order 2021-01 | No report has been filed. Only entities named in the order report, and only crashes they hear of — so this is also what an unequipped car, or a manufacturer without telematics, looks like. |
| Specifications filed with NHTSA | 10 fields | NHTSA vPIC, decoded from VIN patterns | What the manufacturer filed under the federal VIN rule — a configuration, not the full trim ladder. |
| Measured dimensions | 7 fields | Transport Canada, Canadian Vehicle Specifications | Length, width, height, wheelbase, track and curb weight, measured on the North American versions. |
| Trims, pricing & equipment | none | Manufacturer press kit | We have not transcribed a press kit for this model year yet. This is our gap, not the manufacturer's — the one row here where an empty cell means we are behind. |
Rebuilt nightly; this page was generated 2026-10-26. Every figure above is traceable to the source named beside it, and the JSON for this page carries the same values with their identifiers.
Sources & method
Safety Signal starts every model-year at 100 and subtracts points per open NHTSA recall campaign by severity: critical 15 (fire risk, park-outside or do-not-drive advisories), high 8 (brakes, steering, airbags, loss of drive power, structure, battery), moderate 6, minor 3 (software, labels, lighting fixed by an update). The most serious recall counts in full and each further one counts 85% of the one before, because a vehicle sold in millions is recalled more often than a rare one without being more dangerous — and because a flat subtraction bottomed the scale out, scoring a vehicle with 22 recalls within a point of one with six. A ≥ 90, B ≥ 80, C ≥ 70, D ≥ 60, otherwise F. Read it as what it counts: recall campaigns on the federal record, weighted by severity. The damping reduces the sales bias by roughly 40% but does not remove it: like our complaint counts, this is not normalized by how many were sold, so a best-seller still scores somewhat worse than an obscure model with the same real risk. NHTSA crash ratings, do-not-drive and park-outside advisories, and the crash, fire, injury and death counts in owner complaints are reported separately on every page and never blended into the letter — a vehicle can hold five stars and a poor letter at once, and where that happens we say so rather than leave you to notice. Because the scale subtracts from a clean sheet, a model year too new to have been recalled, complained about or bulletined scores full marks on an empty record; we label those grades provisional rather than present them as earned.
EPA figures come from fueleconomy.gov vehicle records. Recalls, complaints, investigations and crash ratings come from NHTSA's public flat files, refreshed nightly.