How to Replace Spark Plugs — 2020-2025 Toyota Corolla

Replacing spark plugs on your 2020-2025 Toyota Corolla is a key maintenance task to ensure smooth engine performance, prevent misfires, and improve fuel efficiency, typically needed every 60,000 to 120,000 miles depending on the plug type. This DIY repair will cost you around $30-$60 for parts, compared to $150-$250 at a shop, and with the right tools and guidance, it’s a straightforward job for most home mechanics. DIY Cost: $30-$60 | Shop Cost: $150-$250

You’re done. Clear any stored codes with your scanner and complete a normal drive cycle so the vehicle’s readiness monitors reset.

If the code returns, the root cause likely wasn’t the part you replaced — go back through the diagnostic steps before swapping anything else.