2021 Mazda CX-9
The 2021 Mazda CX-9 is sold in the U.S. as a gas compact SUV with 2 EPA-rated configurations. The most efficient version, the CX-9 2WD, is EPA-rated at 24 mpg combined. NHTSA lists 1 recall campaign for this model year, which gives it a Safety Signal grade of A. Owners have filed 40 complaints, most often about the engine. NHTSA crash-tested it at 5 stars overall.

Specs & fuel economy
Source: EPA fueleconomy.gov| Configuration | Powertrain | Drive | Engine / motor | City | Hwy | Comb | Annual fuel* |
|---|---|---|---|---|---|---|---|
| CX-9 2WD | Gas | FWD | 2.5L 4-cyl turbo | 22 | 28 | 24 | $2,800 |
| CX-9 4WD | Gas | 4WD | 2.5L 4-cyl turbo | 20 | 26 | 23 | $2,900 |
*EPA estimate at 15,000 miles/year at EPA reference fuel and electricity prices. fueleconomy.gov record ids: 43127, 43135.
Emissions & certification
Source: EPA emission certificates| Configuration | Smog rating | Emission standard | Where it can be sold new | SmartWay |
|---|---|---|---|---|
| CX-9 2WD, CX-9 4WD | 5 / 10 | California LEV-III ULEV70 / Federal Tier 3 Bin 70 | All 50 states (federal, all altitudes); California and states following California standards | — |
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 | Sport Utility Vehicle [SUV]/Multipurpose Vehicle [MPV] |
| GVWR class | Class 1D: 5,001 - 6,000 lb (2,268 - 2,722 kg) |
Engine Basics
| Cylinders | 4 |
| Displacement | 2.5 L |
| Engine configuration | In-Line |
Engine Output
| Horsepower | 227 hp |
Fuel Economy
| Fuel | Gasoline |
Seating
| Seat rows | 3 |
| Seating capacity | 7 seats |
Transmission
| Drivetrain | 4x2 |
| Transmission | Automatic |
| Transmission speeds | 6 |
Driver assistance
Standard: Adaptive cruise control, Anti-lock brakes, Automatic emergency braking, Backup camera, Blind-spot monitoring, Electronic stability control, Forward collision warning, Lane departure warning, Lane keeping assist, Pedestrian automatic emergency braking
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: Grand Touring, Signature, Touring). Figures for the trim you are looking at may differ.
Dimensions & weight
Source: Transport Canada| Length | 199.6 in |
| Width (body, without mirrors) | 77.6 in |
| Height | 67.7 in |
| Wheelbase | 115.4 in |
| Track, front | 64.6 in |
| Track, rear | 64.6 in |
| Curb weight | 4,387 lb |
| Weight distribution, front/rear | 55/45 |
Measured by Transport Canada for its Canadian Vehicle Specifications database, which covers the North American versions of each model — here one configuration: 4-door SUV AWD. 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 2021 Mazda CX-9 is in the years where transmission, electronics and drivetrain 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 (1)
Source: NHTSA recall databaseThese 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.
Whether any of this applies to one specific CX-9
A campaign covers a build range, not a model year, so two identical-looking cars from 2021 can differ. Both of these check a VIN against the manufacturer’s own list, free, in about ten seconds. Mazda 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 2021 Mazda CX-9, with what to do next. Nothing else, ever — no newsletter, no marketing, one-click unsubscribe in every message.
Parts & accessories for the 2021 Mazda CX-9
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 CX-9 →Owner complaints
Source: NHTSA complaint database7 involved a crash · 0 a fire · 1 injuries · 0 deaths reported
9.8 per 10,000 built · Mazda reported 40,785 CX-9 built (its Early Warning production report to NHTSA)
Filed per year: 2021: 1 · 2022: 11 · 2023: 9 · 2024: 10 · 2025: 2 · 2026: 7
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.
Hello, I have been to a Mazda dealer complaining of clicking and squeaky brakes for 2 years now. Dealer replaced both front and back breaks and rotors around 22k year ago and to my surprise the issues persist, currently vehicle is at 49k.
The contact owns a 2021 Mazda CX-9. The contact stated while driving at various speeds and turning, there was a popping sound coming from the front end of the vehicle. The front-end popping sound also occurred while driving over bumps in the roadway.
The contact owns a 2021 Mazda CX-9. The contact stated that while accelerating quickly and entering the highway, there was no motive power to the vehicle. While crossing the highway in the right lane, driving at 65 MPH, the vehicle in front moved over; there was a parked vehicle.
I was in a parking lot and came to a stop and placed the car in reverse to back into a parking space. The back-up camera was on and I began to back into the parking space when the car suddenly lurched/jerked forward and accelerated on its own. The car jumped the parking lot median strip and I hit a tree head on.
I was driving approximately 75-80 mph (speed limit for I-90 is 80 mph) on I-90 Eastbound in South Dakota (approximately 5-8 miles from Sioux Falls, SD) in the left-hand lane (passing lane with a minimal shoulder) when I heard a terrible noise that sounded like I had a flat tire and the car began to pull to the left.
2021 Mazda CX-9 Frontal collision at a speed between 10-20 mph. Car shut down after collision and was not drivable. Concern is the driver side airbag did not deploy. (Neither did passenger but there was no person in the passenger seat)
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 Mazda itself: 5 death-or-injury claims on this model year in its quarterly Early Warning reports to NHTSA (49 CFR 579.21): 5 injured, as claimed, not verified — about 12 per 100,000 built. Every CX-9 model year, by year and system → Dated and by system, they are exhibit F of the defect dossier.
Crash ratings
Source: NHTSA NCAP| Configuration | Overall | Frontal | Side | Rollover | Rollover risk |
|---|---|---|---|---|---|
| SUV AWD | ★★★★★ | ★★★★☆ | ★★★★★ | ★★★★☆ | 16% |
| SUV FWD | ★★★★★ | ★★★★☆ | ★★★★★ | ★★★★☆ | 15% |
NHTSA New Car Assessment Program. Standard driver-assist: forward collision warning, lane departure warning, automatic emergency braking.
Service bulletins & campaigns
Source: NHTSA manufacturer communications- 7 years or 84,000 miles · Mazda warranty extension SSPD5VALVE STEM SEALS CLASS ACTION In conjunction with a Class Action Settlement, Mazda Motor Corporation has decided to conduct an extension of the Engine powertrain warranty related to excessive oil…
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 Mazda warranty extension (9) → · Every warranty extension on file, all makes →
Most often about: Electrical System, Equipment, Engine, Unknown Or Other, Equipment Adaptive/Mobility.
- SA-042-26a Service bulletin2026-09-17 · Unknown Or Other
- Mazda Connected Services - Frequently Asked Questions (FAQ) This Service Alert supersedes the previously issued SAs listed below. The changes are noted in Red text. SA-042/26 06/30/26 DESCRIPTION Frequently Asked Questions (FAQ) Index General Questions MAZDA CONNECT Indication Setup and Getting Started Dealer Processes Registration / Enrollment / Take-Over Customer Subscription Status WI-FI Gene
- SA-041-26a Service bulletin2026-09-11 · Electrical System
- DESCRIPTION If you encounter any type of electrical concern (e.g, dead battery, engine no start, DTC(s) stored...), interview the customer before proceeding with normal MGSS diagnosis by asking if any aftermarket devices have been installed. Aftermarket devices may be the cause of the electrical concern. Below are a few examples of unusual electrical concerns caused by aftermarket devices. Example
- SA-038-26b Service bulletin2026-09-10 · Electrical System
- This Service Alert supersedes the previously issued service alert listed below. The changes are noted in Red text. SA-038/26 08/18/26 and 06/15/26 DESCRIPTION Some customers may complain about any of the following: 1. Infotainment Center Display does not provide the Authorization Code (OTP) during the MyMazda App
- SA-038-26a Service bulletin2026-09-04 · Electrical System
- This Service Alert supersedes the previously issued service alert listed below. The changes are noted in Red text. SA-038/26 06/15/26 DESCRIPTION Some customers may complain about any of the following: 1. Infotainment Center Display does not provide the Authorization Code (OTP) during the MyMazda App Connected Vehicle enrollment. 2. Remote functions inoperative. Engine Start / Stop Door Lock / U
- SA-054-26 Service bulletin2026-08-20 · Unknown Or Other
- This Service Alert supersedes the previously issued Service Alerts listed below: The changes are noted in Red. Infotainment Reboot With Navigation Card Installed This Service Information is no longer valid. Refer to the following updated Technical Service Bulletins: CX-5 / CX-9: 16-002/23 - UPDATED SOFTWARE RELEASE FOR CONCERNS WITH MAZDA CONNECT INFOTAINMENT SYSTEM (7TH GEN TYPE) Mazda3 / CX-30
- SA-039-26a Service bulletin2026-08-19 · Unknown Or Other
- This Service Alert supersedes the previously issued SA(s) listed below. The changes are noted in Red text. SA-039/26 06/15/26 Mazda Connect Symptom Troubleshooting DESCRIPTION Customers having MAZDA CONNECT concerns should have their vehicle repaired using the following repair procedure.
- SA-053-26 Service bulletin2026-08-19 · Wheels
- This Service Alert supersedes the previously issued bulletin(s) listed below. The changes are noted in Red text. SA-006/23 01/23/23 DESCRIPTION Some customers may complain about the infotainment system and/or the MyMazda App showing incorrect clock and/or tire pressures and/or tire pressure missing. This may be caused by: Incorrect calendar entry (month/day/year) after a battery disconnect Infot
- SA-052-26 Service bulletin2026-08-18 · Unknown Or Other
- DESCRIPTION Some customers may complain about SiriusXM Travel Link, Traffic Plus showing expired even though the customer purchased a paid subscription. SiriusXM audio packages do not include SiriusXM Travel Link, Traffic Plus. To get Traffic Plus, the customer must purchase the Infotainment "SiriusXM Traffic Plus with SiriusXM Travel Link (TM)" package.
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 |
|---|---|---|---|
| U3000 U3000 on Mazda → | Manufacturer-defined — the meaning is set by the automaker, not the standard. | Electrical System · Battery → | 12 bulletins |
| P250F P250F on Mazda → | Manufacturer-defined — the meaning is set by the automaker, not the standard. | Engine | 7 bulletins |
| B14F0 B14F0 on Mazda → | Manufacturer-defined — the meaning is set by the automaker, not the standard. | Equipment Adaptive/Mobility | 3 bulletins |
| C1001 C1001 on Mazda → | Manufacturer-defined — the meaning is set by the automaker, not the standard. | Equipment Adaptive/Mobility | 3 bulletins |
| C0023 | Manufacturer-defined — the meaning is set by the automaker, not the standard. | Electrical System · Battery → | 2 bulletins |
| P0300 P0300 on Mazda → | Misfire detected, but not isolated to one cylinder. | Engine · Ignition coils → | 1 bulletin · 1 owner report |
| P0780 P0780 on Mazda → | Manufacturer-defined — the meaning is set by the automaker, not the standard. | Power Train | 2 bulletins |
| P0842 P0842 on Mazda → | Manufacturer-defined — the meaning is set by the automaker, not the standard. | Power Train | 2 bulletins |
| P0847 P0847 on Mazda → | Manufacturer-defined — the meaning is set by the automaker, not the standard. | Power Train | 2 bulletins |
| P0872 P0872 on Mazda → | Manufacturer-defined — the meaning is set by the automaker, not the standard. | Power Train | 2 bulletins |
| P0877 P0877 on Mazda → | Manufacturer-defined — the meaning is set by the automaker, not the standard. | Power Train | 2 bulletins |
| P1738 P1738 on Mazda → | Manufacturer-defined — the meaning is set by the automaker, not the standard. | Power Train | 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 2021 Mazda CX-9 failed the emissions check on 1.7% of first inspections — close to the 1.9% for every 2021 model-year vehicle inspected; and the safety inspection on 1.3% (every 2021 vehicle: 1.5%).
failed emissions
1,575 initial inspections of 1,542 vehicles.
| Measure | The 2021 CX-9 | Every 2021 vehicle | Behind it |
|---|---|---|---|
| Failed the emissions check | 1.7% | 1.9% | 1,573 |
| Failed the safety inspection | 1.3% | 1.5% | 1,575 |
| Air-bag warning lamp stayed lit | 0.25% | 0.19% | 1,575 |
| Miles driven a year | 10,622 | 10,343 | odometer at inspection |
| Average odometer | 55,887 | 54,681 | 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 2021 vehicle” is every 2021 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).
CX-9 by model year
all years, side by side →Common questions about the 2021 CX-9
Source: EPA, NHTSA and manufacturer press kitsDoes the 2021 Mazda CX-9 have any recalls?
NHTSA has posted 1 recall campaign for the 2021 Mazda CX-9. The most serious on file is 21V750000, covering Seat Belts. Check your own VIN at nhtsa.gov/recalls; a recall applies to specific build ranges, not every car.
How safe is the 2021 Mazda CX-9?
NHTSA gave the 2021 Mazda CX-9 5 stars overall in its New Car Assessment Program tests — 4-star frontal crash, 5-star side crash, 4-star rollover. WhichTrim also grades it A (92/100) on its recall record, which is a different question from crash protection.
What is the fuel economy of the 2021 Mazda CX-9?
Across the 2 EPA-rated configurations of the 2021 Mazda CX-9, the best EPA combined figure is 24 mpg. Figures are the EPA's own, per configuration, and every one is listed above.
What are the dimensions of the 2021 Mazda CX-9?
Transport Canada measured it at 199.6 in long, 77.6 in wide (body, without mirrors), 67.7 in tall, on a 115.4 in wheelbase. Curb weight: 4,387 lb. Those are its measurements of the North American versions; every figure is in the table above.
What do owners complain about on the 2021 Mazda CX-9?
Owners have filed 40 complaints with NHTSA about the 2021 Mazda CX-9, most often about engine, unspecified, power train. Of those, 7 involved a crash, 1 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 2021 Mazda CX-9?
The EPA smog rating for the 2021 Mazda CX-9 is 5 out of 10. 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 ULEV70, Federal Tier 3 Bin 70 — which the table above lists per configuration.
Are there service bulletins for the 2021 Mazda CX-9?
The manufacturer has filed 428 service bulletins and related communications with NHTSA for the 2021 Mazda CX-9, most often covering electrical system, equipment, engine. The most recent is dated 2026-09-17. 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 2021 Mazda CX-9 do at state inspection?
In New York’s inspection lanes over the 12 months to Oct 10, 2026, the 2021 Mazda CX-9 failed the emissions check on 1.7% of first inspections — close to the 1.9% for every 2021 model-year vehicle inspected; and the safety inspection on 1.3% (every 2021 vehicle: 1.5%). 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 | 2 configurations | EPA certification records | Every configuration the EPA certified for sale, with its own test figures. |
| Emission certificates | 2 configurations | EPA emission certificates | Smog rating, standard and the sales area that decides where the car can be sold new. |
| Recalls | 1 | NHTSA recall campaigns | A complete federal register: every campaign covering this model year, with severity and advisory flags. |
| Owner complaints | 40 | NHTSA complaint database | Also complete, but unverified: these are reports owners filed, not findings. Counts scale with how many were sold. |
| Crash ratings | 2 tested | NHTSA NCAP | Only the configurations NHTSA chose to crash-test, which is never all of them. |
| Service bulletins | 428 | NHTSA manufacturer communications | Everything the manufacturer told its dealers about a defect or malfunction, short of a recall. |
| Investigations | none | NHTSA Office of Defects Investigation | No defect investigation has been opened. |
| 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 | 12 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.