How to Replace an Oxygen Sensor — 2010-2025 Toyota 4Runner

Replacing an oxygen sensor on your 2010-2025 Toyota 4Runner is a straightforward fix for issues like poor fuel economy, rough idling, or a check engine light with codes like P0138 or P0158. This DIY repair can save you big, costing $50-$150 for parts compared to $200-$400 at a shop. With the right tools and this guide, most DIYers can tackle this job confidently in under two hours. DIY Cost: $50-$150 | Shop Cost: $200-$400

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.