Best Spark Plugs for Jeep Wrangler JK

The Jeep Wrangler is a compact SUV successor to the legendary Jeep Willys MB from World War II. In the next generation, the release of which began in 2006, the car received a new JK platform and became significantly larger than its predecessor.

It is offered in two versions: a short-wheelbase two-door and a long-wheelbase four-door. The standard Wrangler roof is a fabric, folding roof, and a rigid modular version is available as an option. Compared to its predecessors, the car has received many new functions, safety has been increased.

For the first time, almost all of the Wrangler JK’s functions are electronically controlled: engine, transmission, and to some extent the braking system, as well as lighting and auxiliary functions. Various improvements were carried out annually, in particular, in 2011-12, the interior was changed, a new V6 gasoline engine was installed, in addition to which the Wrangler can be equipped with an in-line 4-cylinder turbodiesel engine.


2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 Jeep Wrangler Spark JK Plugs

Info/Engine 3.6L 6-cyl 24v DOHC ERB engine 3.8L 6-cyl 12v OHV EGT engine
OEM spark plug gap 0.035″ (0.88 mm) 0.050″ (1.27 mm)
Qty. needed 6 6
Change interval
Best spark plug Denso 3445 XU22HDR9 Nickel Spark Plug Champion 9440 RE14WLPB5 Iridium Spark Plug
Popular choice E3 E3.82 Spark Plug Champion 7440 RE14PLP5 Double Platinum Spark Plug
Denso (3445) XU22HDR9 Spark Plugs, Pack of 4
2 Reviews
Denso (3445) XU22HDR9 Spark Plugs, Pack of 4
  • Copper core for better thermal conductivity
  • Machine rolled threads to reduce cross-threading and seizing
  • Five ribs prevent flashover
Champion Champion Iridium 9440 Spark Plug (Carton of 1)
  • Champion Iridium - Maximum Performance. Premium Spark Plug
  • Iridium center electrode delivers maximum life
  • Fine-wire center electrode and V-trimmed for greater ignitability
  • V-trimmed ground electrode promotes sharper spark focus
  • Maintains stable operating temperature under all engine loads
Champion Double Platinum Power 7440 Spark Plug (Carton of 1)
444 Reviews
Champion Double Platinum Power 7440 Spark Plug (Carton of 1)
  • Double Platinum Power - Premium Spark Plug. More Powerful Performance.
  • Platinum center and ground electrode for greater wear resistance
  • Maintains stable operating temperature under all engine loads
  • Fine-wire center electrode for greater ignitability
  • V-trimmed ground electrode promotes sharper spark focus

Different configurations allow you to choose exactly the version of the Jeep Wrangler, which seems to the buyer the most suitable for the tasks assigned to the car. For example, the Sahara version will be equally comfortable both on a long journey and in urban use. This version for the Wrangler offers: 5-speed automatic transmission, 17-inch alloy wheels, Command-Trac all-wheel-drive system, tubular side steps, wheel arch extensions in body color, automatic headlights, heated mirrors, leather-wrapped steering wheel and gearbox handles, power windows, climate control, Alpine audio system with subwoofer.

Options include bi-xenon headlights, LED running lights, leather upholstery, keyless entry, navigation and much more. The Rubicon package is the most prepared option for extreme off-road trips. The Rock-Trac all-wheel-drive system, the electronic front stabilizer shutdown function and other features are standard here.

Last update on 2022-01-15 / Affiliate links / Images from Amazon Product Advertising API

Dan Hoffman

Dan is a co-founder of Engineswork. He knows everything about internal combustion engines. Ask your questions in comments down below this article - he will be glad to help you anytime.

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