How often do you change spark plugs on a challenger?
Typically about 100,000 miles under normal driving, with earlier changes possible if you drive aggressively, tow heavy loads, or spend a lot of time on short trips or track use.
The exact schedule varies by engine and year. Dodge’s Challenger lineup includes several powerplants, and while most modern engines use long-life spark plugs, it’s important to follow the specific interval listed in your owner's manual and to monitor engine performance for signs that plugs are wearing prematurely.
Typical replacement intervals by engine family
The following intervals reflect common guidance for recent Challenger models. Always verify against your exact year and engine in the owner’s manual.
- 3.6L Pentastar V6 (various Challenger generations): Replace around 100,000 miles under normal driving; consider 60,000 miles or sooner in severe service (lots of short trips, heavy towing, or extreme conditions).
- 5.7L Hemi V8: Replace around 100,000 miles under normal driving; earlier replacement (around 60,000–90,000 miles) if you frequently drive in severe conditions or notice performance issues.
- 6.4L Hemi (392) V8: Replace around 100,000 miles under normal driving; may be sooner in severe duty or aggressive driving scenarios.
- 6.2L supercharged Hemi (Hellcat/Redeye): Replace around 100,000 miles under normal driving; some owners opt for earlier maintenance if the car is tracked or driven aggressively, as extreme use can accelerate wear.
Bottom line: for daily driving with a Challenger, plan for spark plug replacement near 100,000 miles. If your car sees frequent high-RPM operation, track days, or short trips, discuss a more conservative interval with a dealer or trusted mechanic.
Signs that spark plugs may need replacement
Even with long-life plugs, wear or fouling can develop. Watch for these indicators that suggest it’s time to inspect or change the plugs.
- Rough idle or misfires, especially at low speed or idle
- Loss of acceleration or reduced engine power
- Decreased fuel economy or rough running
- Check Engine light or diagnostic trouble codes related to misfire or cylinder misfire
- Difficulty starting the engine or unusual backfiring
Note: these symptoms can also be caused by ignition coils, wiring, or fuel system issues. A professional diagnosis is recommended if you notice any of these signs.
DIY versus professional replacement
Spark plug replacement on most Challenger models is a straightforward job for someone with basic automotive skills, but the difficulty increases with newer engines or if access is tight. If you’re comfortable with basic tools and torque specs, you can perform the replacement yourself by following the service manual for your exact engine. Otherwise, a certified technician can ensure proper torquing, gap settings, and anti-seize considerations where appropriate.
Summary
For most Challenger owners, spark plugs are a long-life component, with a typical replacement interval around 100,000 miles in normal use. Severe service, aggressive driving, or track usage can shorten that window, so always refer to your owner’s manual for the specific schedule and monitor for signs of wear. Regular maintenance and timely replacement help preserve performance, efficiency, and reliability across the Challenger lineup.
How long do Hemi spark plugs last?
If you drive a RAM 1500 with a 5.7L HEMI V8 engine built before 2014, you should replace the spark plugs every 30,000 miles. Newer models with the same engine can go up to 100,000 miles before needing a change.
What are signs of bad spark plugs?
Signs of bad spark plugs include rough idling, difficulty starting the engine, decreased fuel economy, and poor acceleration. You may also experience engine misfires, which can cause the vehicle to shake or hesitate, and the check engine light to illuminate.
Performance issues
- Rough idling: The engine shakes or sputters when the car is stopped.
- Engine misfires: The engine skips a beat, which can be felt as a hesitation or vibration.
- Poor acceleration: The vehicle feels sluggish when you press the gas pedal.
- Engine knocking: Unusual knocking or pinging sounds may come from the engine.
Fuel and starting problems
- Poor fuel economy: You'll notice you need to fill up the gas tank more often.
- Difficulty starting: The engine may crank for a longer time before starting.
Visual and warning signs
- Check engine light: The light may come on, especially if the misfires are frequent.
- Black exhaust smoke: The tailpipe might emit black smoke.
- Visual inspection: When removed, a bad spark plug may show a worn electrode, a cracked insulator, or deposits of oil or fuel.
How often should I change the spark plugs on my Dodge Challenger?
every 30,000 miles
If you have been wondering how often to change the spark plugs in your Chrysler, Dodge, Jeep, Ram, Wagoneer vehicle, Bettenhausen CDJR has the answer to this common question. Generally, automotive experts recommend that drivers change their spark plugs every 30,000 miles.
How much does it cost to replace spark plugs in a Dodge Challenger?
The average cost for a Dodge Challenger Spark Plug Replacement is between $411 and $632.
