Adohon Iridium Spark Plugs 4-Pack | Fits Toyota Lexus

Restore your engine's firing power with a set of premium dual iridium spark plugs designed for Toyota and Lexus vehicles. This 4-piece lot covers multiple OEM part numbers including 90919-01210 SK20R11, 90919-01233 SK16HR11, 90919-01240 SK16R11, 90919-01249 FK20HBR11, 90919-01253 SC20HR11, and 90919-01275 SC16HR11. Choose the right model for your car and enjoy a smoother, more efficient drive.

Each spark plug in this set uses dual iridium electrodes for consistent, powerful ignition. Iridium is a hard-wearing material that resists wear far longer than standard copper or nickel alloys. That means you get reliable starts, stable idling, and fewer misfires over the life of the plug. The medium calorific value suits everyday driving conditions, balancing heat range for both city commutes and highway cruising.

Installation is straightforward thanks to the dwarf flat mounting base and standard spanner sizes. Whether you are a DIY mechanic or a professional technician, these plugs are built to drop right into compatible Toyota and Lexus engines. The set includes four plugs, which is exactly what most four-cylinder engines need for a full tune-up.

Upgrading to iridium spark plugs is one of the simplest ways to improve fuel efficiency and throttle response. This set gives you a direct replacement for several factory part numbers, so you can match the exact spec your vehicle requires. Get your engine back to peak performance without overcomplicating the job.

Key Features and Benefits

- Dual iridium electrodes that deliver a strong, consistent spark for better combustion and smoother acceleration

• Medium calorific value that works well for daily driving, reducing the risk of pre-ignition or fouling

• Dwarf flat mounting base that fits a wide range of Toyota and Lexus engines without modification

• Multiple compatible part numbers in one set, giving you the flexibility to choose the correct model for your car

• Set of four plugs that provides a complete replacement for standard four-cylinder engines

Who Is This For

- Toyota and Lexus owners looking for a direct OEM-style replacement spark plug set

• DIY home mechanics who want a reliable, long-lasting ignition upgrade without visiting a shop

• Drivers experiencing rough idling, hard starts, or reduced fuel economy who need a simple fix

• Anyone maintaining a compatible four-cylinder engine and wanting iridium durability over standard plugs

Usage Scenario

Mark noticed his Toyota Camry was starting slower than usual and the fuel economy had dropped by a couple of miles per gallon. He picked up this set of iridium spark plugs, matched the part number to his engine, and swapped out the old plugs in under an hour. After the change, the engine fired up instantly, the idle smoothed out, and his next tank of gas went noticeably further. A simple weekend job saved him a trip to the mechanic and restored his car's performance.

Micro Comparison

Standard copper spark plugs wear out faster and require more frequent replacement, often every 20,000 to 30,000 miles. This iridium set lasts significantly longer while providing a more consistent spark. Compared to basic nickel plugs, dual iridium electrodes resist erosion better, meaning you get reliable ignition for a longer period. This set gives you a durable upgrade that matches or exceeds the lifespan of many factory-installed plugs.

Specifications

Type: Iridium Spark Plug

Electrode Material: Dual Iridium

Calorific Value: Medium

Mounting Base: Dwarf Flat

Interchange Part Numbers: 90919-01210 SK20R11, 90919-01233 SK16HR11, 90919-01240 SK16R11, 90919-01249 FK20HBR11, 90919-01253 SC20HR11, 90919-01275 SC16HR11

Model 90919-01210 SK20R11: Thread Length 19 mm / 0.75 in, Outer Thread 14 mm / 0.55 in, Spanner Size 16 mm / 0.63 in

Model 90919-01233 SK16HR11: Thread Length 26.5 mm / 1.04 in, Outer Thread 14 mm / 0.55 in, Spanner Size 16 mm / 0.63 in

Model 90919-01240 SK16R11: Thread Length 26.5 mm / 1.04 in, Outer Thread 14 mm / 0.55 in, Spanner Size 16 mm / 0.63 in

Model 90919-01249 FK20HBR11: Thread Length 26.5 mm / 1.04 in, Outer Thread 14 mm / 0.55 in, Spanner Size 16 mm / 0.63 in

Model 90919-01253 SC20HR11: Thread Length 26.5 mm / 1.04 in, Outer Thread 12 mm / 0.47 in, Spanner Size 14 mm / 0.55 in

Model 90919-01275 SC16HR11: Thread Length 26.5 mm / 1.04 in, Outer Thread 12 mm / 0.47 in, Spanner Size 14 mm / 0.55 in

Package Includes

- 4 x Iridium Spark Plug (choose your model from the six available)

Why You Will Love It

You will love the confidence of knowing your engine is firing on premium iridium electrodes that last longer than standard plugs. This set gives you a direct, hassle-free upgrade that improves everyday drivability. It is a small investment that keeps your Toyota or Lexus running smoothly for thousands of miles.

Questions and Answers

Question: Will these spark plugs fit my 2010 Toyota Corolla?

Answer: They fit many Toyota and Lexus models. Check your engine's required part number against the six models listed to confirm compatibility.

Question: What is the difference between iridium and regular spark plugs?

Answer: Iridium plugs have a harder, more durable electrode that resists wear longer than copper or nickel plugs. They provide a more consistent spark and typically last longer between changes.

Question: Do I need to gap these plugs before installation?

Answer: Iridium plugs are usually pre-gapped from the factory. It is still a good practice to verify the gap with a tool, but most users install them as received.

Question: How many plugs come in this set?

Answer: The set includes four spark plugs, which is enough for a standard four-cylinder engine.

Question: Can I use these plugs in a Lexus ES350?

Answer: The ES350 may require a specific plug model. Compare your vehicle's OEM part number with the six options in this listing to find the correct match.