2023 Tesla Model S — Spark Plug Type & Gap

Quick reference

Why the right plug matters

For internal-combustion engines (ICE), the correct spark plug heat range and electrode material (iridium vs. platinum vs. copper) directly affect starting, fuel economy, power, and plug life. Iridium plugs typically offer the longest service life and the best resistance to fouling, while platinum is a solid mid‑grade choice and copper provides great conductivity but shorter intervals.

However, the 2023 Tesla Model S is a fully electric vehicle. It has no engine, no cylinders, and no conventional ignition system—there are no spark plugs, coil‑on‑plug (COP) modules, or distributors. Instead, the Model S uses high‑voltage battery packs, inverters, and permanent‑magnet/induction motors that do not require spark ignition. That’s why you won’t find OEM or aftermarket spark plug part numbers, gap specs, or torque specs for this car.

If you also maintain gasoline vehicles in your household, remember:

• Heat range: Must match the engine’s needs. Too hot can cause pre‑ignition; too cold can foul.
• Electrode metal: Iridium lasts the longest (often 90k–120k miles), platinum is mid‑range, copper is typically 20k–30k miles depending on application.
• Design: Some modern engines need fine‑wire iridium with specific tip geometry and built‑in resistors to match ignition energy and ion‑sensing strategies.

How to gap a spark plug

Not applicable to the 2023 Tesla Model S, but useful if you service ICE vehicles:

• Use a wire or feeler‑style gap gauge, not a coin‑style wedge that can distort fine‑wire electrodes.
• Slide the gauge through the gap to verify the specification. Most late‑model iridium plugs come pre‑gapped; check, don’t assume.
• To adjust, make a very light bend on the ground strap only—never pry on the center electrode, and avoid twisting motions that can crack porcelain.
• Re‑check in both inches and millimeters if the spec is provided that way (for example, 0.044 in ≈ 1.1 mm).

Replacement procedure tips (general ICE guidance — your Tesla does not use spark plugs)

The Tesla Model S has no spark plugs or ignition coils to replace. If you are performing spark plug service on another vehicle:

• Coil‑on‑plug removal: Unplug the electrical connector, remove the retaining bolt, and twist the coil boot gently to break the seal before pulling up to avoid tearing the boot.
• Compressed air: Blow out the plug wells before removal so debris doesn’t fall into the cylinder.
• Socket choice: Use a spark plug socket with an internal rubber insert or a magnetic version to protect the ceramic.
• Anti‑seize: Most modern plugs have nickel‑plated shells. Follow the plug maker’s guidance—NGK, Denso, and many OEMs advise no anti‑seize because it alters torque values and can lead to over‑tightening. If a manufacturer explicitly allows it, reduce torque by roughly 20–30%.
• Torque: Always torque to spec on aluminum cylinder heads to prevent thread damage. Tight plus a small turn is not a substitute for a torque wrench.
• Dielectric grease: A pea‑size amount in the coil boot can help sealing and future removal; keep grease off the terminal where it could insulate the connection.

Known issues

Not applicable to the 2023 Tesla Model S—there are no spark plugs to seize, foul, or break. For reference on ICE platforms (not applicable here):

• Ford 3‑valve V8 (2004–2008): Two‑piece plugs can seize and break on removal without proper procedure and special tools.
• GM 5.3L engines with ionization‑sensing coils: Require specific resistor plugs; mismatched plugs can set misfire codes.

What to service on your Tesla instead

While spark plugs aren’t part of Tesla maintenance, stay on top of EV‑specific and chassis items:

• Cabin air filter
• Brake fluid test/flush as needed and brake caliper cleaning/lubrication in corrosive climates
• Tire rotations and alignments; check tread wear from instant torque
• Coolant service for battery/drive unit (follow Tesla intervals)
• High‑efficiency particulate filters (if equipped) and HVAC cleaning as required

Need plugs replaced? Find a shop on Repairius.