What Spark Plugs Fit a 2015 Mazda CX-9?
Spark plugs part numbers catalogued for the 2015 Mazda CX-9 (3.5 L petrol, 6-cyl, 263 hp), the engine variants that change them, and how to replace them.
The 2015 Mazda CX-9 with the 3.5 L petrol, 6-cyl, 263 hp engine takes spark plugs such as DENSO ITV16TT, CHAMPION CET17PSB and BOSCH 0 242 236 672 (aftermarket parts catalogue). The catalogue lists 17 spark plugs from 9 brands for this engine, BRISK and WILMINK GROUP listing the most (4 each). The 2015 CX-9 was built with 4 engine variants (from 3.5 L to 3.7 L); these part numbers are catalogued for the 3.5 L petrol, and other engines can take a different spark plug.
Last updated: · Source: aftermarket parts catalogue
2015 Mazda CX-9 spark plugs: key facts
| Catalogued engine | 3.5 L petrol, 6-cyl, 263 hp |
|---|---|
| Part numbers | ITV16TT (DENSO); CET17PSB (CHAMPION); CCH9901 (CHAMPION); CET17P (CHAMPION); 0 242 236 672 (BOSCH); S17174 (FENOX) |
| Catalogue listings | 17 spark plugs, 9 brands |
| Engine variants (2015) | 4, from 3.5 L to 3.7 L |
| Fit is decided by | The engine, the thread size and reach, the heat range and the electrode gap |
| NHTSA recalls: engine | None of 2 on record |
| DIY | Moderate DIY (gap matters; harder on V-engines) |
Sources: aftermarket parts catalogue (part numbers, engines), NHTSA recalls.
Spark Plugs: what it does & when to replace it
Spark plugs ignite the air-fuel mixture in each cylinder. Worn plugs cause rough idle, misfires, hard starting, hesitation, and reduced fuel economy. Service intervals vary widely by plug type: copper plugs last around 50,000 km, while iridium and platinum plugs can last 100,000–160,000 km. Always match the manufacturer heat range and gap. Replacement is a moderate DIY job — straightforward on inline engines but harder on V-engines where the rear bank is hard to reach. Electric vehicles do not use spark plugs at all.
DIY difficulty: Moderate DIY (gap matters; harder on V-engines). Always confirm the correct part for your exact build by VIN before buying.
Which engine does your 2015 Mazda CX-9 have?
The 2015 Mazda CX-9 was sold with 4 engine variants, and the correct spark plugs can differ between them. This is the single thing a year/make/model dropdown cannot tell you.
| Engine | Fuel | Cylinders | Years |
|---|---|---|---|
| 3.7 L 277 hp | Petrol | 6 | 2007–now |
| 3.5 L 263 hp | Petrol | 6 | 2007–now |
| 3.7 L 268 hp | Petrol | 6 | 2012–now |
| 3.7 L 273 hp | Petrol | 6 | 2008–now |
Engine variants catalogued for this model (parts catalogue), filtered to those built around 2015. We hold catalogued part numbers for the base engine only — decode your VIN and we resolve your exact engine, then the exact part. Full dimensions and specifications for this vehicle are on the 2015 Mazda CX-9 overview.
How to replace the spark plugs on a 2015 Mazda CX-9
- 1With the engine cool, remove the engine cover and disconnect one coil pack or plug lead at a time (do them one at a time to keep firing order).
- 2Blow out debris from the plug well, then unscrew the old plug with a spark plug socket.
- 3Check the new plug’s gap against the manufacturer spec and adjust only if needed.
- 4Thread the new plug in by hand to avoid cross-threading, then torque it to spec.
- 5Reconnect the coil/lead (a dab of dielectric grease helps) and repeat for each cylinder.
⚠ Match the exact plug and heat range for your engine; V-engines’ rear bank can be hard to reach.
These are general steps for the ignition category. Exact fastener locations, torque values, and the correct part number depend on your 2015 Mazda CX-9’s build — confirm by VIN before you start.
Compatible parts for your 2015 Mazda CX-9
Real spark plugs options catalogued for this 2015 Mazda CX-9 (parts catalogue), shown for the base engine (3.5000 L Petrol). Each links to live marketplace listings for that exact brand and part number.
| Brand | Part number | Note | Shop |
|---|---|---|---|
| DENSO | ITV16TT⇆ cross-ref |
Spark Plug | Find this part → |
| CHAMPION | CET17PSB⇆ cross-ref |
Spark Plug | Find this part → |
| CHAMPION | CCH9901⇆ cross-ref |
Spark Plug | Find this part → |
| CHAMPION | CET17P⇆ cross-ref |
Spark Plug | Find this part → |
| BOSCH | 0 242 236 672⇆ cross-ref |
Spark Plug | Find this part → |
| FENOX | S17174⇆ cross-ref |
Spark Plug | Find this part → |
Compatible options shown for the base engine — exact fit can vary by engine and trim; confirm with your VIN before buying. Part data: aftermarket parts catalogue.
Shop spark plugs for your 2015 Mazda CX-9
Browse spark plugs listings from major marketplaces. Confirm fitment by VIN first — use VinSnap above to get the exact part number for your build before purchasing.
Find the exact spark plugs by VIN
Find parts for your exact 2015 Mazda CX-9 by VIN. Stop buying the wrong part.
Find parts by VIN →Decode your exact VIN
Get 100+ specs for your specific 2015 Mazda CX-9 — engine, trim, recalls, and a PDF. Instant decode for $1.99.
Decode my VIN →Frequently asked questions
What spark plugs fit a 2015 Mazda CX-9?
The 2015 Mazda CX-9 with the 3.5 L petrol, 6-cyl, 263 hp engine takes spark plugs such as DENSO ITV16TT, CHAMPION CET17PSB and BOSCH 0 242 236 672 (aftermarket parts catalogue). The 2015 CX-9 was built with 4 engine variants (from 3.5 L to 3.7 L); these part numbers are catalogued for the 3.5 L petrol, and other engines can take a different spark plug.
Which brands make spark plugs for the 2015 Mazda CX-9?
For the 3.5 L petrol engine, the catalogue lists 17 spark plugs from 9 brands: BRISK, WILMINK GROUP, CHAMPION, BOSCH, DENSO, EUROREPAR, FENOX, HART and 1 more.
How often should the spark plugs on a 2015 Mazda CX-9 be replaced?
Spark plugs ignite the air-fuel mixture in each cylinder. Worn plugs cause rough idle, misfires, hard starting, hesitation, and reduced fuel economy. VinSnap has no manufacturer-specific interval on file for the 2015 Mazda CX-9; the owner’s manual has the official schedule.
Can I replace the spark plugs on a 2015 Mazda CX-9 myself?
Moderate DIY (gap matters; harder on V-engines). Allow about 1 hour. Tools: spark plug socket, ratchet + extension, torque wrench, gap gauge, dielectric grease. Match the exact plug and heat range for your engine; V-engines’ rear bank can be hard to reach.