2021 Tesla Model X Spark Plug Type & Gap Guide

As an ASE-certified master technician, I get asked a lot of questions about vehicle maintenance here at Repairius.com. Sometimes, we get search queries for the spark plug specifications, gap, and torque settings for the 2021 Tesla Model X.

If you are looking for the spark plug replacement guide for your 2021 Model X, I have some excellent news for your wallet and your weekend schedule: The 2021 Tesla Model X is a Battery Electric Vehicle (BEV) and does not have an internal combustion engine (ICE). Therefore, it does not have spark plugs, ignition coils, or a distributor.

However, for educational purposes—and in case you also have a gas-powered vehicle in your garage—let's walk through standard ignition principles using our standard format.

Quick reference

Here is the "spec" table for the 2021 Tesla Model X Dual Motor and Plaid configurations:

Note: Your Tesla relies on an electric battery pack and inverters sending alternating current to electric motors. No sparks required!

Why the right plug matters

If you were driving a traditional gas-powered vehicle, choosing the correct spark plug would be absolutely vital. Internal combustion engines rely on the precise heat range of a spark plug to pull heat away from the combustion chamber. If a plug is too "hot," it can cause pre-ignition and engine knock; if it's too "cold," carbon will foul the tip.

The electrode metal is also crucial in gas cars:

• Copper: Highly conductive, but wears out fast (typically 30k miles).
• Platinum: Runs hotter and lasts longer (up to 50k-80k miles).
• Iridium: The hardest metal used in modern OEM plugs, offering the best longevity (100k+ miles) and a highly focused spark.

Since the Model X uses electromagnetism rather than tiny gasoline explosions to propel you forward, you completely bypass the need to worry about electrode metals!

How to gap a spark plug

Again, you will never need to gap a spark plug on a Tesla Model X. But if you're working on a gas-powered daily driver, gapping is a necessary skill.

To check a gap, use a specialized feeler gauge or a wire-style gap tool. Slide the gauge between the center electrode and the ground strap. If the gap is too tight, you gently bend the ground strap outward using the tool's built-in pry notch. If it’s too wide, you lightly tap the ground strap on a soft wooden workbench to close it. Never pry against an iridium or platinum center electrode, as they are incredibly brittle and will snap.

Replacement procedure tips

For traditional engines, replacing plugs involves removing the coil-on-plug (COP) assemblies, cleaning the spark plug tubes of debris, and carefully extracting the plugs. Technicians endlessly debate the use of anti-seize on spark plug threads; modern NGK and Denso plugs feature a specialized trivalent plating, meaning you should not use anti-seize, as it acts as a lubricant and causes over-torquing. We always apply a small dab of dielectric grease to the inside of the coil boot to prevent moisture intrusion and voltage leaks.

For your 2021 Tesla Model X, your "ignition" maintenance procedure consists entirely of making sure your software is updated and your wall connector is plugged in properly!

Known issues

In the automotive world, ignition systems are notorious for specific failures. For example, the early-2000s Ford 3-valve 5.4L V8s were infamous for their 2-piece spark plug shells breaking off inside the cylinder head, requiring expensive extraction tools. Similarly, GM's 5.3L engines often use ionization-sensing coils that are incredibly sensitive to aftermarket spark plug resistances.

Tesla owners, you can breathe a sigh of relief. You will never experience a cracked porcelain insulator, a misfire code (P0300), or a broken plug shell.

Need plugs replaced on your other car, or need suspension work on your Tesla? Find a shop on Repairius.