How Often to Change Spark Plugs Jeep Wrangler?

They may be small, but spark plugs perform a mighty job for your Jeep Wrangler. Nonetheless, spark plugs wear out over time and need maintenance and replacement. To this end, Jeep recommends changing the spark plugs every 100,000 miles.

However, the spark plugs on a Jeep Wrangler don’t always make it to 100,000 miles. You will need to change them between 30,000 and 40,000 miles. Still, it depends on whether you have conventional or platinum-tipped spark plugs.

Read on to learn when to change spark plugs in your Jeep Wrangler. I’ll take you through the proper procedure so that you can have your Jeep driving smoothly in no time.

What Are Spark Plugs?

A spark plug is a small component that corks into the cylinder. It is responsible for providing the spark that ignites combustion to start the vehicle. When the spark plugs are malfunctioning, your car will not start.

Symptoms of Bad Spark Plugs

The Car Has Trouble Starting

Since the spark plugs create the spark that powers up your engine, your vehicle will stall when you try to turn it on.

Engine Misfire

When a cylinder remains unfired, your engine will stumble momentarily and lose speed (RPMs). It’s one of the signs of bad spark plugs, and you should check it out as soon as possible.

Read More:  Is Reflective Tint Illegal? Understanding Automotive Window Tint Laws

Rough Idling

If the sound from your engine changes from purring to pinging, rattling, or knock-like noises, bad spark plugs may be to blame.

Decreased Fuel Economy

If you’re filling up on gas more often than you’re used to, your Jeep Wrangler is not burning fuel effectively. According to the National Institute of Automotive Service Excellence, a misfiring spark plug can reduce your Jeep’s fuel efficiency by 30%.

Car Struggles to Accelerate

Worn spark plugs are ineffective at igniting fuel-air-mixture. Thus, you’ll notice a lack of energy when you want your Jeep to accelerate.

How Many Spark Plugs Does the Jeep Wrangler Have?

The number of spark plugs in a vehicle depends on the engine type. Most cars have one spark plug per engine cylinder. However, there are those with twin spark plug engines.

With this in mind, Jeep Wranglers have six to sixteen spark plugs depending on the specific model. All Jeep Wranglers with a V6 engine have six spark plugs – one spark plug per cylinder.

However, if your Jeep Wrangler is a 2022 Rubicon model with a HEMI V8 engine, it has 16 spark plugs. If you want to learn more about Jeep, visit

Why Do We Need to Change Spark Plugs on the Jeep Wrangler?

The health of your Jeep’s spark plugs is directly correlated to the engine’s performance. This is because they ignite the combustion process and ensure that your vehicle starts without difficulty.

Spark plugs endure abuse and withstand extreme temperatures but remain intact over thousands of miles.

Unfortunately, they can’t last forever. Deposits build on the spark plugs, leading to an unreliable energy supply for your vehicle.

Read More:  Volvo Maintenance Cost: Are they Expensive to Maintain?

In addition, a spark needs to travel across a space gap to provide the correct level of combustion at the right moment. This gap expands when the spark plug ages; hence, combustion is erratic or ineffective.

Benefits of Changing the Spark Plugs

Consistent Production of Effective Combustion

New spark plugs function well to yield optimum combustion. In addition, they prevent performance issues and save you from constant engine repair.

Increased Fuel Efficiency

Replacing spark plugs comes with the advantage of increasing fuel economy. This is because your vehicle no longer uses more fuel due to misfires.

Smooth Starts

With new spark plugs, you can say goodbye to difficult jerky starts.

Lower Carbon Emissions

New spark plugs reduce the pressure on your engine. As such, the motor operates at optimal power, which reduces harmful emissions.

Improved Horsepower

When you replace spark plugs, they improve the engine’s performance and allow a much faster response.

You will notice more rapid acceleration because the engine has the energy required at the right moment.

How Often to Change Spark Plugs Jeep Wrangler?

You should change the spark plugs in a Jeep Wrangler every 30,000 to 40,000 miles for conventional spark plugs. However, if you are using platinum-tipped spark plugs, they can last up to 100,000 miles.

While 30K to 40K miles is the ideal replacement interval, you should have your Jeep Wrangler serviced every 6,000 miles. The auto technician will ensure that the spark plugs are correctly gapped and not damaged.

You can inspect the condition of the spark plugs once a year to see if they have carbon or black, oily deposits. Then, find out whether you have only one or several fouled spark plugs and replace them accordingly.

Read More:  How Much Does Tire Rotation & Balancing Cost [Price Comparison]

How Much Does It Cost to Change the Spark Plugs on the Jeep Wrangler?

Your Jeep Wrangler will cost around $229 – $302 in spark plug replacement. The spark plugs cost approximately $63 – $92, while the labor costs around $167 – $210. These costs depend on the Jeep Wrangler’s age and model.

How Do We Change the Spark Plugs on the Jeep Wrangler?

Changing the spark plugs on a Jeep Wrangler is a straightforward process.

You Will Need:

  • 13 mm socket
  • 5/8-inch socket
  • Ratchet/ socket extension
  • Spark plug gap tool
  • Torque wrench

Step-by-step Guide:

YouTube video

Step 1: Locate the ignition coil on the side of the engine on the passenger’s side. It has four 13mm bolts that you will need to remove to get to the spark plugs.

Step 2: Remove the air intake hose.

Step 3: Use a 13mm socket to remove the four bolts from the ignition coil.

Step 4: Remove the ignition coil gently since one side is closest to the firewall. The coil connects directly to the spark plugs.

Step 5: Use the 5/8” spark plug socket and ratchet to turn each spark plug. You only need to turn the spark plug in half a turn, and then you can remove it by hand. Remove the spark plugs one by one.

Step 6: Set the new spark plug gaps at 0.035 – 0.040 inches using a spark plug gap tool.

Step 7: Insert the new spark plug in the 5/8-inch socket and center it gently in the housing. Turn the spark plug once, then use a torque wrench to apply the proper torque setting of about 26 – 30 ft.-lbs.

Read More:  What to Do If Your Tesla Runs Out of Battery: Immediate Steps and Solutions

Step 8: Once you have replaced all the spark plugs, start placing the ignition coil rail back on. Align the holes with the spark plugs, then put the four bolts back.

It’s better to insert the bolts by hand to ensure they line up correctly. After which, use the torque wrench to apply a torque of 21 – 23 ft.-lbs of torque.

Step 9: Reconnect the air intake hose and all other parts you had removed. Start the engine, and you have successfully replaced the spark plugs in your Jeep Wrangler.

Final Thoughts

That’s a wrap, guys. The question of how often to change spark plugs Jeep Wrangler is now behind you. Go ahead and check your vehicle’s mileage. If your spark plugs are due for replacement, it’s a simple DIY job you can do at home.

Good luck!

Leave a Comment