Chrysler does not rely on a single spark plug across all its vehicles. The correct spark plug depends on the engine and year. In modern Chrysler models, OEM plugs are typically iridium- or platinum-tipped and supplied by major brands such as NGK or Champion, with the exact part number dictated by the engine code and market. Diesels in the brand lineup use glow plugs, not spark plugs.
This article explains why there isn’t one universal plug, outlines the main engine families used by Chrysler today, and provides practical steps to identify and replace the right spark plug for your vehicle.
Why the plug varies by engine
The ignition requirements of each engine are different. Factors such as compression ratio, coil and ignition system design, and heat range determine which spark plug is correct. Chrysler sources plugs from major manufacturers (often NGK or Champion) in various heat ranges and tip designs, and the exact part number is specific to the engine code, year, and market. Always verify with the owner’s manual or a dealer parts catalog to ensure you’re using the right plug for your vehicle.
Key engine families and typical plug characteristics
Below is a high-level look at common Chrysler engine families in recent years. The exact plug type and gap are engine-specific, and you should confirm the precise specification for your model.
- 3.6L Pentastar V6 family: a widely used engine across multiple brands in the group; modern implementations typically use iridium- or platinum-tipped plugs with engine-specific heat ranges.
- 5.7L Hemi V8 family: found in performance and trucks; generally employs long-life iridium- or platinum-tipped plugs tailored to each variant.
- 6.4L Hemi V8 and other larger displacement engines: designed for high performance, with iridium- or platinum-tipped plugs matching the engine’s ignition needs.
- 2.0L turbocharged and other modern small-displacement engines: often require higher-performance plugs due to turbocharging, with specific heat ranges determined by the engine code.
- Diesel engines (where present in the Chrysler lineup): use glow plugs rather than traditional spark plugs; the two systems are not interchangeable.
Conclusion: Engine family and year determine the spark plug specification. If you’re unsure, consult the official parts catalog for your exact vehicle to avoid misfires or heat-range issues.
How to identify the exact spark plug for your Chrysler
The following steps help you pinpoint the correct plug for your specific vehicle. The list below walks you through verifying the exact part number for your engine code and configuration.
- Check the owner’s manual or the under-hood label for the recommended spark plug specification, including heat range and gap.
- Identify your engine code (for example, 3.6L Pentastar, 5.7L Hemi) and cross-check the OEM parts catalog or dealer portal for the exact plug number.
- If you have access to the old spark plug, inspect it for part numbers or stamping that indicate heat range or brand, then cross-reference with the catalog.
- When shopping, use your VIN in a parts retailer’s database to ensure the plug matches your exact vehicle configuration and market.
- Consult a dealer service department or a qualified technician if you’re unsure, especially for diesel models or engines with unusual specifications.
Getting the exact part number right helps ensure optimal performance and avoids misfires or premature wear.
Tips for replacement and maintenance
Before replacing spark plugs, consider these practical guidelines to ensure a correct and lasting installation.
- Use the spark plug type, heat range, and gap specified for your engine code. Do not substitute a plug with an incorrect heat range.
- Check the torque specification and follow the recommended torque during installation to avoid under- or over-tightening.
- If replacing during a routine maintenance interval, inspect ignition coils or coil-on-plug boots for wear and replace as needed.
- Follow the manufacturer’s guidance on anti-seize lubrication; many modern plugs are designed to be installed without anti-seize and relying on proper torque is sufficient.
- For diesel engines, remember to service glow plugs separately, as they have different requirements and lifespan considerations.
In short, always rely on the engine-specific specification for a Chrysler model rather than a one-size-fits-all approach. When in doubt, the dealer or an experienced technician can confirm the correct part for your exact vehicle.
Summary
The answer to “what spark plug does Chrysler use” is that there is no single plug across the brand. Chrysler’s spark plugs vary by engine family, model year, and market, with modern engines typically using iridium- or platinum-tipped plugs from brands like NGK or Champion. Diesels use glow plugs, not spark plugs. To identify the correct plug, consult the vehicle’s manual, VIN-based parts catalogs, or a dealership, and ensure you match heat range, thread size, and gap to the engine’s specification. Proper selection and installation help maintain performance, fuel efficiency, and reliability.
What brand is OEM for Chrysler?
Mopar®
Regardless of their source, OEM parts are always designed by the original manufacturer of the vehicle they represent, which results in better value, reliability, and longevity. In the case of Chrysler, Dodge, Jeep, and RAM vehicles, their OEM parts are produced under Mopar®.
What is better, Denso or NGK?
Key Differences:
NGK spark plugs are particularly touted for their strong performance in high-speed, high-stress scenarios such as racing or heavy-duty driving. Denso, on the other hand, shines in everyday driving conditions, particularly emphasizing fuel efficiency and engine smoothness.
Who makes Chrysler spark plugs?
Mopar Spark
Mopar Spark Plugs, Cables, Coils and Glow Plugs.
What spark plugs does Chrysler recommend?
Mopar Spark Plugs are the original equipment choice for Chrysler, Dodge and Jeep® vehicles.
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