A Guide to Spark Plug Replacement for the 2022-2023 Lexus IS500
Everything you need to know about keeping your IS500's V8 engine firing on all cylinders.
- Plan to replace your spark plugs at or before the 60,000-mile mark for optimal performance.
- Denso is the OEM supplier; choosing an aftermarket Denso Iridium plug provides the same quality as the dealer part.
- This is a manageable DIY project for those with basic tools, as the plugs are easily accessible on the 5.0L V8.
- There are no active recalls or major known issues for the spark plugs on this vehicle.
Symptoms of Failing Spark Plugs
The 2UR-GSE engine in the IS500 is generally very reliable, but spark plugs are a wear item that will eventually need replacement. When they start to fail, you may notice several signs. A rough idle, where the engine shakes or vibrates more than usual, is a common symptom. You might also experience a noticeable loss of power, slower acceleration, or a drop in fuel economy. In more serious cases, the check engine light may come on with a code indicating an engine misfire (e.g., P0300 - P0308).
🎬 Watch: How to diagnose and fix common Lexus engine misfire codes.Choosing the Right Aftermarket Spark Plugs
When it comes to spark plugs for your IS500, quality is key. The original equipment manufacturer (OEM) for Lexus is Denso. This means the spark plugs you buy from a Lexus dealer are made by Denso.
OEM vs. Aftermarket Quality
You can often buy the exact same quality spark plug from an aftermarket supplier for less money than at the dealership. Since Denso is the OEM supplier, choosing an aftermarket Denso Iridium plug with the correct part number (like the FK20HBR-J8) gives you the same performance and longevity as the genuine Lexus part. These plugs use an iridium tip, which is a very hard and durable precious metal that provides a consistent spark for a long time.
Known Issues, Recalls, or TSBs
As of early 2026, there are no specific recalls, widespread owner complaints, or Technical Service Bulletins (TSBs) from Lexus related to spark plug failure on the 2022-2023 IS500. This is a good sign, indicating the original parts are reliable. The main point of confusion for owners is the replacement interval.
| Part Type | Price Range (Set of 8) |
|---|---|
| New OEM (Dealership) | $160 - $250 |
| New Aftermarket (Denso) | $184 - $216 |
| Shop Labor | $200 - $350 |
Frequently Asked Questions (FAQ)
When should I replace the spark plugs on my IS500?
This is a common question. While some modern cars can go 100,000 miles or more, the recommendation for the IS500 is more frequent. Lexus maintenance schedules have shown conflicting information, but dealers and owner experiences point to a 60,000-mile replacement interval. Some service guides even suggest a 40,000-mile change to maintain the emissions warranty. To be safe and maintain performance, planning for replacement at or before 60,000 miles is a wise choice.
🎬 See this 60k service walkthrough to save money on maintenance.Can I replace the spark plugs myself?
Yes, this is a DIY-friendly job for those with some mechanical experience. The spark plugs and ignition coils on the IS500's V8 are located on the top of the engine and are relatively easy to access. You will need a specific spark plug socket, a torque wrench, and some basic hand tools. Unlike some V6 engines where the intake manifold must be removed, the IS500's layout is much more straightforward.
🎬 Watch: Step-by-step guide to changing spark plugs on a Lexus V8.Do I need to gap the new spark plugs?
No. High-quality iridium plugs from brands like Denso come pre-gapped from the factory for your specific engine. You should not attempt to change the gap, as this can damage the fragile iridium tip. Simply verify the part number is correct and install them carefully.
Should I replace the ignition coils at the same time?
It is not necessary to replace the ignition coils when you replace the spark plugs. Coils are not a standard wear item like plugs and should only be replaced if they fail and cause a misfire. Replacing all eight coils as a preventative measure would be very expensive and is not recommended.
Helpful Videos
Technical Specifications
OEM Part Numbers: 90919-01279 90919-01263
The 2022-2023 IS500 uses eight (8) iridium-tipped, long-life spark plugs. The most commonly cited OEM part is a Denso, model FK20HBR-J8.
We Have This Part in Stock
The information in this article is provided for general reference and educational purposes only. Vehicle specifications, procedures, and part compatibility can vary by production date, trim level, and region. Always consult your vehicle's factory service manual and verify part numbers before purchasing or performing repairs. Safety-critical components such as airbags, seat belts, and braking systems should be installed by a qualified professional.
- Lexus IS500: