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The average lifespan of Lexus IS250 spark plugs typically ranges from 30,000 to 45,000 miles. The cost of replacing them can vary, based on the location and quality of parts. Generally, dealerships will charge between $550 and $650 for both parts and labor. Factors such as using OEM, aftermarket, or platinum-tipped parts will influence the overall cost. It is common to also replace the engine air filters when changing the spark plugs. If you choose to do the replacement yourself, you will need an A5/8" spark plug socket with a magnet. Use a ratchet to take out the old plugs carefully, ensuring the new and old threads are the same length to avoid any damage to the engine.
The average cost of replacing the spark plugs on a Lexus is250 falls within the range of $100 to $120. The labor costs typically range from $100 to $110, while the parts cost between $5 and $15.