Best Spark Plugs For 2012 Jeep Grand Cherokee 5.7 Hemi

When I first tackled the tune-up on my own 2012 Jeep Grand Cherokee 5.7 Hemi, I realized just how crucial those sixteen spark plugs are. The Hemi platform demands precision, and swapping out those worn factory plugs isn’t just about maintenance—it’s about restoring that low-end grunt and improving fuel economy. We’ve done the research and tested the top contenders to help you find the absolute best spark plugs for your 2012 Jeep Grand Cherokee 5.7 Hemi, ensuring you get that crisp throttle response and reliable MDS performance back.

IMAGE	PRODUCT NAME	AMAZON LINK
	16 pc Champion Copper Plus Spark Plugs compatible with…	View on Amazon
	16 pc NGK Iridium IX Spark Plugs compatible with Jeep…	View on Amazon
	16 pc Champion Iridium Spark Plugs compatible with Jeep…	View on Amazon
	16 pc NGK G-Power Spark Plugs compatible with Jeep Grand…	View on Amazon
	Ignition Coil Pack Spark Plugs fit for 5.7 Hemi Dodge…	View on Amazon
	16 pc Champion Copper Plus Spark Plugs compatible with…	View on Amazon
	8x Ignition Coil Pack and 16x Iridium Spark Plugs Fit…	View on Amazon
	NGK Standard Series Spark Plug LZFR5C-11 (8 Pack)…	View on Amazon
	ENA Set of 16 Iridium Spark Plug Compatible with Chrysler…	View on Amazon
	ENA 8 Ignition Coil Pack 16 Iridium Spark Plug Compatible…	View on Amazon

16 pc Champion Copper Plus Spark Plugs compatible with Jeep Grand Cherokee 5.7L V8 2009-2019

If you’re looking for the original equipment feel and don’t mind changing your plugs more frequently, the Champion Copper Plus is a fantastic choice. Champion has a long history with Mopar vehicles, often being the plug installed at the factory. These copper-core plugs offer maximum conductivity for a powerful, hot spark, which is precisely what the 5.7L Hemi loves for peak initial performance. They are reliable, easy to gap, and generally produce excellent low-end throttle response right out of the box.

Key features that stand out:
– OE Quality: Genuine Champion parts engineered as a direct replacement.
– Copper Core: Provides superior conductivity and spark energy.
– Reliable Performance: Trusted by Champion, a major automotive manufacturer supplier.
– Full Set: Comes in a complete 16-pack, ensuring you have the eight pairs needed for your Hemi engine.

Pros:
– Excellent conductivity for maximum spark power.
– Highly affordable option for a full 16-plug change.
– Known for optimal performance in Hemi engines when new.

Cons:
– Require replacement much sooner than iridium or platinum plugs.

Best for: The enthusiast who performs regular maintenance and wants the best possible spark power and throttle response for the lowest cost.

Expert Opinion: Champion Copper is the historical choice for Hemi power. While they need more frequent replacement, their robust conductivity ensures excellent ignition efficiency, minimizing the risk of misfires early in their life cycle.

16 pc NGK Iridium IX Spark Plugs compatible with Jeep Grand Cherokee 5.7L V8 2009-2020

Moving up the performance and longevity ladder, the NGK Iridium IX plugs are a prime choice for the 5.7L Hemi owner prioritizing long service intervals. Iridium is significantly harder and more durable than copper, allowing for a finer wire center electrode that concentrates the spark. This results in incredibly consistent ignition over tens of thousands of miles, making them ideal if you hate doing the 16-plug job frequently.

Key features that stand out:
– Iridium Construction: Exceptional longevity and wear resistance.
– Fine Wire Electrode: Offers improved ignitability and better fuel efficiency over time.
– Wide Coverage: Compatible with 5.7L V8 models from 2009 all the way up to 2020.
– Genuine NGK: A globally recognized leader in high-performance ignition.

Pros:
– Fantastic long-term durability, minimizing required maintenance.
– Improved throttle response and stable idle compared to worn plugs.
– Resists fouling and wear exceptionally well.

Cons:
– They carry a significantly higher initial cost than copper plugs.

Best for: The high-mileage driver who wants maximum reliability and the longest service life possible between tune-ups.

Expert Opinion: NGK Iridium IX plugs are the gold standard for maintenance minimization. The Hemi’s design makes plug changes tedious, so investing in Iridium means enjoying smooth performance for 80,000+ miles.

16 pc Champion Iridium Spark Plugs compatible with Jeep Grand Cherokee 5.7L V8 2009-2019

If you prefer to stick with the Champion brand but want the extended durability of modern materials, this Iridium set is your answer. These plugs combine Champion’s trusted engineering with the long-life benefits of iridium, ensuring reliable MDS (Multi-Displacement System) operation and consistent performance. They are designed to meet or exceed OE standards, offering a seamless fit and powerful spark for your 2012 Grand Cherokee.

Key features that stand out:
– Durable Precious Metals: Built to improve performance while minimizing wear and tear.
– Extended Life: Iridium construction allows for long maintenance intervals.
– Trusted Heritage: Champion’s commitment to quality from the racetrack to OE components.
– Full Hemi Set: Complete 16-pack replacement for the dual-plug Hemi system.

Pros:
– Excellent blend of OE-level fitment and modern longevity.
– Reliable ignition crucial for Hemi engine functions.
– Strong resistance to electrode wear.

Cons:
– Pricier than the equivalent copper option from the same brand.

Best for: Owners who are loyal to the Champion brand but need the convenience of Iridium’s extended service life.

Expert Opinion: Choosing the Champion Iridium provides peace of mind. You get the quality manufacturing associated with the OE supplier but with the modern lifespan expected by today’s drivers.

16 pc NGK G-Power Spark Plugs compatible with Jeep Grand Cherokee 5.7L V8 2009-2020

The NGK G-Power series utilizes Platinum, offering a solid middle ground between the budget-friendly Copper and the high-end Iridium plugs. These plugs feature a fine platinum tip, which improves durability over standard copper while still maintaining high ignitability. This is a great choice for the budget-conscious owner who wants a step up in lifespan without the premium price tag of Iridium.

Key features that stand out:
– Platinum Construction: Longer life than copper, but more affordable than Iridium.
– Fine Wire Design: Promotes better starting and quicker acceleration.
– Triple-Gasket Seal: Ensures excellent protection against combustion leakage.
– Consistent Spark: Provides reliable ignition for the dual-plug Hemi setup.

Pros:
– Excellent performance for the price point.
– Noticeably longer life expectancy than copper plugs.
– Resists fouling better than standard plugs.

Cons:
– Platinum typically doesn’t last quite as long as true Iridium plugs.

Best for: The value-driven customer seeking a reliable, long-lasting plug that balances cost and performance for their 5.7 Hemi.

Expert Opinion: Platinum plugs like the G-Power are often underrated. They provide a significant jump in reliability and lifespan over copper, making them a very practical choice for the typical daily driver.

Ignition Coil Pack Spark Plugs fit for 5.7 Hemi Dodge Ram 1500, Chrysler 300, Challenger Charger Durango, Jeep Commander Grand Cherokee, 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020

This kit offers a comprehensive solution by bundling eight ignition coil packs with the required spark plugs. For the 2012 Grand Cherokee 5.7 Hemi, you need 16 plugs (eight pairs) and eight coils. If your vehicle is high mileage, replacing the aging coils along with the plugs is highly recommended to avoid future misfires caused by weak ignition. This bundle ensures all parts of the ignition system are refreshed simultaneously.

Key features that stand out:
– Complete Ignition Overhaul: Includes 8 coils (UF504 equivalent) and spark plugs.
– Misfire Prevention: Suggested replacement strategy to solve issues like rough idle or misfires.
– OEM Specifications: Designed and produced under high standards to meet or exceed original quality.
– Wide Application: Compatible across the entire 5.7 Hemi platform, including your 2012 Jeep.

Pros:
– Massive convenience of having all ignition components in one purchase.
– Ensures a complete fix for rough running or poor fuel economy.
– Cost-effective compared to buying coils and plugs separately.

Cons:
– The quality of the included generic spark plugs may not match premium brands like NGK or Champion.

Best for: Owners experiencing recurring misfires or those with high-mileage 5.7 Hemi engines where coils are likely nearing their failure point.

Expert Opinion: While we always prefer premium branded plugs, the value proposition here is undeniable. If you’re tackling your first 100k+ mile tune-up, replacing the coils is prudent, and this bundle simplifies the process significantly.

16 pc Champion Copper Plus Spark Plugs compatible with Jeep Grand Cherokee 5.7L 6.1L V8 2005-2010

While the title specifically mentions the 2005–2010 range, these Copper Plus plugs are often compatible with the early third-generation WK chassis and, in many cases, share the same requirements as the 2012 WK2 5.7L Hemi engine (always confirm the exact part number). As with all Copper Plus plugs, the focus here is on maximum heat transfer and robust spark, offering quick throttle response essential for heavy vehicles like the Grand Cherokee.

Key features that stand out:
– High Heat Transfer: Copper core efficiently dissipates heat, vital for the hard-working Hemi.
– OE Heritage: Reliable Champion engineering built for Mopar platforms.
– Performance Focus: Engineered to keep the engine running at its peak potential.
– Cost-Effective: An economical way to perform the full 16-plug change.

Pros:
– Highly effective spark for strong initial power delivery.
– Excellent price point for bulk replacement.
– Proven reliability in various generations of the 5.7L Hemi.

Cons:
– Must be replaced more often than precious metal plugs (every 30k miles is standard).

Best for: Mechanics or serious DIYers who prefer the feel and reliability of classic copper plugs and plan on frequent, simple maintenance.

Expert Opinion: Copper plugs are essential for engines that see high heat and frequent cycles, which describes the 5.7 Hemi perfectly. When new, these plugs offer unbeatable spark quality.

8x Ignition Coil Pack and 16x Iridium Spark Plugs Fit for 5.7 V8 HEMI 2009 2010 2011 2012 2013 2014 2015 Dodge Ram 1500 2500 3500 Charger Challenger Durango Jeep Cherokee Commander Chrysler 300 Aspen

This is an upgraded comprehensive kit that couples eight new ignition coils with sixteen Iridium spark plugs. Unlike cheaper bundles, the use of Iridium here means you’re installing a complete ignition system designed for high performance and maximum longevity. This combination is particularly beneficial for the 2012 Jeep Grand Cherokee owner who wants to eliminate misfires and not worry about ignition components for the next 100,000 miles.

Key features that stand out:
– Iridium Longevity: Paired coils with premium Iridium plugs for long service life.
– Enhanced Coil Design: Claims to upgrade 15% more energy than OE coils for a hotter spark.
– Direct OEM Fit: Coils are designed for straightforward installation and meet replacement standards (UF504).
– Comprehensive Solution: Address both spark and delivery issues simultaneously.

Pros:
– Addresses both plug wear and coil degradation in one package.
– Iridium plugs offer exceptional durability and high resistance to wear.
– Potential for improved starting and smoother acceleration due to enhanced coil power.

Cons:
– The performance claims on the enhanced coils are hard to verify without dyno testing.

Best for: The driver demanding a top-tier, long-lasting ignition overhaul, where longevity and performance enhancement are key criteria.

Expert Opinion: This bundle hits the sweet spot for a full tune-up. You get the peace of mind that comes with Iridium, combined with the preventative maintenance of new coils—a strong value proposition.

NGK Standard Series Spark Plug LZFR5C-11 (8 Pack) Compatible With JEEP GRAND CHEROKEE OVERLAND 2011-2013 5.7L/345

The NGK Standard Series, specifically the LZFR5C-11, is often an excellent OE-style choice. Crucially, note that this is sold in an 8-pack, meaning you would need to purchase two sets to complete the full 16-plug change required by the Hemi engine. These plugs feature a copper core and specialized design, leveraging NGK’s superior materials science, including trivalent metal plating for anti-seizing properties—a helpful feature given the deep plug wells on the Hemi.

Key features that stand out:
– Anti-Seizing: Trivalent metal plating assists with easy installation and removal.
– Copper Core: Aids in heat removal and provides high electrical conductivity.
– Corrugated Ribs: Prevents dangerous flashover of high voltage.
– Superior Insulator: Pure alumina silicate ceramic for strength and excellent heat transfer.

Pros:
– High-quality, OE-equivalent plug design from a respected manufacturer.
– Features like the anti-seizing plating simplify future maintenance.
– Reliable ignition performance right after installation.

Cons:
– The necessity to buy two separate packs (16 total plugs) can complicate ordering.

Best for: Owners looking for a high-quality, OE-style copper plug that provides excellent short-term performance and easy future maintenance due to NGK’s plating.

Expert Opinion: NGK’s anti-seizing technology is a huge benefit on high-mileage Hemis. These plugs are well-engineered standard replacements that focus on reliable function and superior fitment.

ENA Set of 16 Iridium Spark Plug Compatible with Chrysler Dodge Jeep Ram 300 Challenger Charger Durango Commander Grand Cherokee 1500 1500 Classic 2500 5.7L Replacement for 5018 LFR5AGP

ENA offers a full set of 16 Iridium spark plugs at a competitive price point. These are designed as a direct, OE-quality replacement, compatible with the 5.7L V8 platform, including your 2012 Grand Cherokee. The benefit of Iridium here is the durability; even at a value price, you are getting plugs engineered for reliability over time, ensuring your engine runs smoothly under all operating conditions.

Key features that stand out:
– Value Iridium: Access long-life iridium technology without the top-tier brand price.
– Full 16 Set: Conveniently packaged for the Hemi’s unique requirements.
– Reliable Operation: Engineered to operate reliably under all performance demands.
– Easy Installation: Designed for quick and straightforward replacement.

Pros:
– Affordable way to upgrade to iridium longevity.
– Full set means no complex ordering of multiple packages.
– Designed to handle various conditions consistently.

Cons:
– ENA is a lesser-known brand compared to industry giants like NGK or Champion.

Best for: The budget-minded buyer who wants the longevity of Iridium plugs but needs to save money on the overall purchase cost.

Expert Opinion: For a value-focused Iridium plug, these are a strong contender. The key benefit remains the extended lifespan, which is where iridium truly shines for the Hemi platform.

ENA 8 Ignition Coil Pack 16 Iridium Spark Plug Compatible with Chrysler Dodge Jeep Ram Aspen Challenger Durango Commander Grand Cherokee 5.7L 2009-2014 2015 2016 2017 2018 2019 2020 for UF504 92145

This is ENA’s premium combination bundle, pairing their 16-piece Iridium spark plug set with a full complement of eight ignition coils. This comprehensive kit provides everything needed to completely refresh the ignition system on your 2012 Jeep Grand Cherokee 5.7L. With a 24-month warranty, this option provides both reliability and excellent coverage against manufacturing defects, making it an appealing option for long-term peace of mind.

Key features that stand out:
– Full Ignition System: 8 coils and 16 Iridium plugs included.
– 24-Month Warranty: Provides confidence in the quality and longevity of the components.
– Wide Compatibility: Covers the 5.7L Hemi engine used across many Mopar vehicles.
– Seamless Replacement: Designed to replace OE part numbers UF504 and 5149049AB.

Pros:
– Exceptional warranty coverage for both coils and plugs.
– Combines the best of longevity (Iridium) and preventative maintenance (new coils).
– Highly cost-effective solution for a complete ignition tune-up.

Cons:
– Quality control on value-branded coils can occasionally be inconsistent compared to OE.

Best for: The owner looking for the highest value complete ignition system overhaul, backed by a strong warranty.

Expert Opinion: If you are over 80,000 miles, replacing the coils is non-negotiable for smooth running. This ENA kit is one of the most cost-effective ways to use Iridium plugs and new coils together.

Comparison Insights: Copper vs. Iridium and Bundles

Choosing between spark plug materials is the biggest decision for your 2012 Jeep Grand Cherokee 5.7 Hemi.

Copper Plugs (Champion Copper Plus, NGK Standard): These are the performance champions when they are new. Copper offers the best electrical conductivity, providing the hottest, most efficient spark possible. They are also the most affordable. However, you must be prepared to change all 16 plugs every 30,000 miles. They are the best choice for those focused solely on short-term power and economy.

Iridium/Platinum Plugs (NGK Iridium IX, Champion Iridium, ENA Iridium): These are the longevity leaders. They maintain consistent performance for 80,000 to 100,000 miles, making them ideal for high-mileage daily drivers. While slightly less conductive than pure copper, the difference is negligible for a stock 5.7 Hemi, and the incredible reduction in maintenance is worth the higher price.

Ignition Coil Bundles (ENA, NPAUTO, LCWRGS): For high-mileage vehicles, choosing a bundle that includes new coils is highly recommended. The Hemi’s dual-plug system means you have eight coils that degrade over time. If your Jeep is suffering from intermittent misfires or rough idling, replacing the plugs and the coils at the same time is the most efficient and effective fix, eliminating potential weak points in the ignition system.

Final Verdict

Deciding on the best spark plugs for your 2012 Jeep Grand Cherokee 5.7 Hemi comes down to your priorities: budget, longevity, or a complete system refresh.

The Long Haul Champion (Best Longevity)

If you absolutely despise doing the 16-plug tune-up, the 16 pc NGK Iridium IX Spark Plugs compatible with Jeep Grand Cherokee 5.7L V8 2009-2020 are the clear winner. Their superior construction means you can expect reliable, smooth performance for years, not just months.

The Budget Workhorse (Best Initial Performance)

For the purest OE feel and the best spark quality immediately after installation, you can’t beat the 16 pc Champion Copper Plus Spark Plugs compatible with Jeep Grand Cherokee 5.7L V8 2009-2019. Just remember to mark your calendar for the next replacement.

The All-in-One Solution (Best Value Overhaul)

If your Hemi is showing signs of age (rough idle, slight hesitation), refreshing the entire ignition system is the smart move. The ENA 8 Ignition Coil Pack 16 Iridium Spark Plug Compatible with Chrysler Dodge Jeep Ram provides a comprehensive, warranted solution using long-life iridium plugs, saving you money and headaches in the long run.

Best Spark Plugs For 2012 Jeep Grand Cherokee 5.7 Hemi: Frequently Asked Questions

Q: Why does the 5.7L Hemi require 16 spark plugs?

A: The 5.7L Hemi uses a design called a “dual ignition system.” This means each of the eight cylinders has two spark plugs (one leading and one trailing). This setup dramatically improves the combustion process, leading to a more complete fuel burn, which enhances power, reduces emissions, and helps prevent the “Hemi tick” associated with incomplete combustion.

Q: What is the recommended gap for the spark plugs in a 2012 Jeep Grand Cherokee 5.7 Hemi?

A: For the 5.7L Hemi, the factory specification usually calls for a spark plug gap of 0.045 inches (or 1.14 mm). While many plugs come pre-gapped, it is always crucial to double-check and adjust the gap on all 16 plugs before installation, especially when using copper or platinum plugs.

Q: How often should I replace the spark plugs in my 5.7 Hemi?

A: This depends entirely on the material you choose. Copper Plus plugs should be replaced every 30,000 miles. Platinum or Iridium plugs, which are better suited for the high heat of the Hemi, can typically last 80,000 to 100,000 miles. Always consult your owner’s manual for the manufacturer’s suggested maintenance intervals for your specific 2012 Jeep Grand Cherokee.

Q: Can using the wrong spark plugs affect the MDS system?

A: Yes, absolutely. The MDS (Multi-Displacement System) switches four cylinders off for better fuel economy. If any of the 16 spark plugs are worn out, faulty, or incorrectly gapped, the engine can suffer misfires or rough running when the MDS activates or deactivates. Using high-quality, properly gapped plugs is essential for smooth MDS operation and optimal fuel economy in your Jeep.

Q: Should I choose copper or iridium spark plugs for performance tuning?

A: For a stock 5.7 Hemi engine, iridium offers the best blend of performance and maintenance freedom. However, if you are running heavy modifications, like a supercharger or nitrous, colder range copper plugs are often preferred because they handle high heat better and provide the highest spark energy, though they must be changed frequently. For a standard tune, the iridium options are highly recommended.

Q: Are ignition coil pack bundles worth the investment for the 2012 Grand Cherokee?

A: If your 2012 model is approaching or exceeding 100,000 miles, replacing the coils is a smart preventative measure. Aged coils weaken the spark, leading to misfires and stress on the engine control unit. Bundles that include both ignition coils and spark plugs are highly economical and guarantee a completely refreshed, high-output ignition system.