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2021 Mazda

CX-9 2WD

Auto (S6), 4 cyl, 2.5 L, Turbo

Mazda CX-9: best and worst years
2021 Mazda CX-9 2WD (photo 1 of 3)

Photo may show a different model year; you're viewing the 2021.

PhotoAlexander MiglCC BY-SA 4.0Wikimedia Commons

Overview

Body
Small Sport Utility Vehicle 2WDEPA, from EPA, last updated 6/22/2026
Drivetrain
Front-Wheel DriveEPA, from EPA, last updated 6/22/2026
Transmission
Automatic (S6)EPA, from EPA, last updated 6/22/2026
Powertrain
GasEPA, from EPA, last updated 6/22/2026
Fuel
RegularEPA, from EPA, last updated 6/22/2026

Engine & performance

Cyl
4EPA, from EPA, last updated 6/22/2026
Aspiration
TurbochargedEPA, from EPA, last updated 6/22/2026
Start-stop system
NoEPA, from EPA, last updated 6/22/2026

Efficiency

MPG Hwy
28 mpgEPA, from EPA, last updated 6/22/2026
MPG City
22 mpgEPA, from EPA, last updated 6/22/2026
MPG Comb
24 mpgEPA, from EPA, last updated 6/22/2026
Fuel $/yr
$2,600EPA, from EPA, last updated 6/22/2026
CO₂
363 g/miEPA, from EPA, last updated 6/22/2026
Eco Score
5/10EPA, from EPA, last updated 6/22/2026
Smog score
5/10
Elec. Range
0 miEPA, from EPA, last updated 6/22/2026
SmartWay certified
No

Dimensions & capacity

Length
200 inNHTSA vPIC, from NHTSA vPIC, last updated 6/5/2026
Width
78 inNHTSA vPIC, from NHTSA vPIC, last updated 6/5/2026
Height
68 inNHTSA vPIC, from NHTSA vPIC, last updated 6/5/2026
Wheelbase
115 inNHTSA vPIC, from NHTSA vPIC, last updated 6/5/2026
Curb Weight
4,387 lbNHTSA vPIC, from NHTSA vPIC, last updated 6/5/2026

Safety NHTSA, model year

Overall crash rating
★★★★★
Rollover rating
★★★★
Stability control (ESC)
Standard
Forward-collision warning
Standard
Lane-departure warning
Standard
Recalls
1
Owner complaints
33
Reported injuries
1

Reported problems NHTSA owner complaints, model year

  • ENGINE39%
  • UNKNOWN OR OTHER15%
  • SERVICE BRAKES10%
  • FORWARD COLLISION AVOIDANCE7%
  • AIR BAGS5%
  • BACK OVER PREVENTION5%

Source: NHTSA owner complaints, 41 total.

Mazda CX-9: best and worst years

Known issues manufacturer service bulletins, model year

406 service bulletins filed with NHTSA for this model year

  • May 19, 2026ELECTRICAL SYSTEMSA-034-26

    This service alert supersedes the previously issued service alert listed below. The changes are noted in Red text. SA-047/25 10/07/25 DESCRIPTION When the Telematics Control Unit (TCU) replacement is necessary due to a failure, use MDARS to activate the new TCU after replacement. Use the information in this service alert to initialize the new TCU until the procedure on MGSS is updated. CAUTION: DO NOT swap TCU with another vehicle as the TCU is VIN locked after activation. A TCU swap with anoth

  • Apr 30, 2026UNKNOWN OR OTHERSA-031-26

    DESCRIPTION Some vehicles may require the replacement of a damaged VIN plate or vehicle certification label. To obtain a replacement VIN plate (bulkhead-mounted and visible through the lower-left area of the windshield), contact DAG (Dealer Assistance Group) using VIN Plate Request Form available on One Mazda. To obtain a replacement vehicle certification label (located on the B􀀀pillar or front door), contact your assigned DSM (District Service Manager) to place the order. If DSM contact informa

  • Apr 29, 2026ENGINESSPD5 Parts Warr b

    Valve Stem Seals Class Action Settlement Program for Excessive Oil Consumption and Oil Consumption Powertrain Warranty Extension Special Service Program SSPD5. Updated April 28, 2026 – Related oil part number for warranty claims is now 0000-77-5W30-QT (engine oil) as the 5555 warranty part number has been removed. As a reminder, all coverage reverts back to the original extension of 7 years or 84,000 miles whichever comes first. WARRANTY EXTENSION If you have any questions regarding this campaig

  • Apr 21, 2026POWER TRAINSA-029-26

    This Service Alert supersedes the previously issued SA listed below: The changes are noted in Red. SA-011/24 02/12/24, 06/06/24, 07/29/24 DESCRIPTION Mazda has developed factory recommended scheduled maintenance services that support all major vehicle systems. Mazda recommends dealers follow the scheduled maintenance tables as cited in the vehicle-specific workshop manual or owner's manual. Services performed outside of Mazda's factory scheduled maintenance are not recommended. These services ar

  • Apr 16, 2026ENGINESA-026-26

    This Service Alert supersedes the previously issued M-Tip(s) listed below. The changes are noted in Red text. MT-002/19 09/30/19 and 12/19/19 DESCRIPTION If an engine assembly is replaced after a catastrophic internal mechanical failure, clean the intake manifold internally before installing a replacement engine assembly. If the intake manifold is not cleaned properly, the replacement engine may fail prematurely. Metallic debris from the old engine (with catastrophic internal mechanical failure)

  • Apr 15, 2026ELECTRICAL SYSTEMSA-027-26

    This SA supersedes the previously issued bulletin(s) listed below. The changes are noted below in Red. SA-007/25 10/22/25, 06/02/25 and 02/03/25 DESCRIPTION The Mazda DCA-8000 is required for all warranty battery testing. If the Mazda DCA-8000 is not used, incorrect battery testing may result in unnecessary battery replacement. Use the following test procedures in this Service Bulletin to test Mazda vehicle batteries and to generate a Warranty Code. NOTE: A Warranty Code is required for warranty

  • Mar 11, 2026ENGINESA-014-26

    This Service Alert supersedes the previously issued SA(s) and TSB(s) listed below: The changes are noted in Red. SA-035/24 05/31/24 DESCRIPTION There is a concern that some water pumps are being replaced that are not faulty, due to signs of a very small coolant leak from the bleed hole. This Service Alert is to inform you about the water pump sealing mechanism and the criteria if replacement is necessary or not. A mechanical seal (A) is used for the water pump. This mechanical seal can seal coo

  • Feb 26, 2026ENGINE01-004-26

    This bulletin supersedes the previously issued bulletin(s) listed below. The changes are noted below in Red. 01-007/24 06/20/24 ENGINE OIL LEVEL WARNING LIGHT ON WITH DTC P250F:00 DUE TO LOW ENGINE OIL LEVEL (UPDATED WITH SSPD5 INFORMATION). All Mazda Dealers: Follow the Special Service Program SSPD5 – Valve Stem Seal Class Action for determination if valve stem seals should be replaced. 1. Verify the customer concern following the Special Service Program SSPD5 Repair Procedure. As the repair p

  • and 398 more

Source: NHTSA manufacturer communications (technical service bulletins).

Warranty manufacturer terms, by make

Basic
3 yr / 36k mi
Powertrain
5 yr / 60k mi
Roadside assistance
3 yr / 36k mi
EV battery
8 yr / 100k mi

Information is gathered on a best-effort basis from public sources, may be incomplete or out of date, and is not purchasing or financial advice. Verify with the manufacturer or dealer before buying.