What Spark Plugs Fit a 2020 Jeep Grand Cherokee?
What decides spark plug fit on the 2020 Jeep Grand Cherokee, where to find your VIN, and how to replace them.
VinSnap does not have a verified spark plug part number for the 2020 Jeep Grand Cherokee yet. Which spark plugs fit depends on the engine, the thread size and reach, the heat range and the electrode gap, so compare those on the part you are replacing. The 2020 Grand Cherokee was built with 27 engine variants (from 3.0 L to 6.4 L), so the right spark plug depends on which one yours has. The 17-character VIN is on the driver-side dashboard at the base of the windshield and on the sticker in the driver’s door jamb; it identifies the exact engine and trim. Jeep’s maintenance schedule for the 2020 Grand Cherokee lists the spark plugs every 100,000 mi.
Last updated: · Source: TecDoc catalogue (engines)
2020 Jeep Grand Cherokee spark plugs: key facts
| Verified part number | None on file yet |
|---|---|
| Engine variants (2020) | 27, from 3.0 L to 6.4 L |
| Fit is decided by | The engine, the thread size and reach, the heat range and the electrode gap |
| Manufacturer interval | Every 100,000 mi (Jeep) |
| NHTSA recalls: engine | 1 of 3 for this model |
| DIY | Moderate DIY (gap matters; harder on V-engines) |
Sources: TecDoc catalogue (engines), manufacturer maintenance schedule, 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 2020 Jeep Grand Cherokee have?
The 2020 Jeep Grand Cherokee was sold with 27 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 |
|---|---|---|---|
| 3.6 L 286 hp | Petrol | 6 | 2010–now |
| 5.7 L 352 hp | Petrol | 8 | 2010–now |
| 3.0 L 190 hp | Diesel | 6 | 2011–now |
| 3.0 L 241 hp | Diesel | 6 | 2011–now |
| 6.4 L 468 hp | Petrol | 8 | 2011–now |
| 3.6 L 286 hp | Petrol/Ethanol | 6 | 2010–now |
| 3.6 L 294 hp | Petrol/Ethanol | 6 | 2010–now |
| 5.7 L 366 hp | Petrol | 8 | 2011–now |
| 3.6 L 284 hp | Petrol | 6 | 2010–now |
| 3.0 L 234 hp | Petrol | 6 | 2013–now |
| 3.6 L 290 hp | Petrol | 6 | 2010–now |
| 3.0 L 243 hp | Diesel | 6 | 2014–now |
| 3.0 L 250 hp | Diesel | 6 | 2013–now |
| 6.4 L 476 hp | Petrol | 8 | 2011–now |
| 3.6 L 294 hp | Petrol | 6 | 2013–now |
| 6.4 L 472 hp | Petrol | 8 | 2011–now |
| 3.0 L 238 hp | Petrol | 6 | 2014–now |
| 3.6 L 281 hp | Petrol | 6 | 2010–now |
| 5.7 L 364 hp | Petrol | 8 | 2011–now |
| 5.7 L 360 hp | Petrol | 8 | 2013–now |
| 6.4 L 481 hp | Petrol | 8 | 2014–now |
| 3.6 L 299 hp | Petrol/Ethanol | 6 | 2017–now |
| 3.6 L 296 hp | Petrol/Ethanol | 6 | 2017–now |
| 3.0 L 218 hp | Diesel | 6 | 2011–now |
| 6.4 L 477 hp | Petrol | 8 | 2014–now |
| 6.2 L 717 hp | Petrol | 8 | 2018–now |
| 6.2 L 710 hp | Petrol | 8 | 2017–now |
Engine variants catalogued for this model (TecDoc), filtered to those built around 2020. 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 2020 Jeep Grand Cherokee overview.
How to replace the spark plugs on a 2020 Jeep Grand Cherokee
- 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 2020 Jeep Grand Cherokee’s build — confirm by VIN before you start.
Shop spark plugs for your 2020 Jeep Grand Cherokee
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Decode my VIN →Frequently asked questions
What spark plugs fit a 2020 Jeep Grand Cherokee?
VinSnap has no verified spark plug part number for the 2020 Jeep Grand Cherokee yet. Match on the engine, the thread size and reach, the heat range and the electrode gap; the 17-character VIN is on the driver-side dashboard at the base of the windshield and on the sticker in the driver’s door jamb, and it pins down the engine and trim.
How often should the spark plugs on a 2020 Jeep Grand Cherokee be replaced?
Jeep’s maintenance schedule for the 2020 Grand Cherokee lists the spark plugs every 100,000 mi. Spark plugs ignite the air-fuel mixture in each cylinder. Worn plugs cause rough idle, misfires, hard starting, hesitation, and reduced fuel economy.
Can I replace the spark plugs on a 2020 Jeep Grand Cherokee 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.
Are there recalls on the 2020 Jeep Grand Cherokee’s engine?
Yes. NHTSA lists 1 recall for the 2020 Jeep Grand Cherokee filed under the engine: 23V411000 (2023-06-08), engine and engine cooling. Recall repairs are free at a franchised Jeep dealer.