How to Replace an Oxygen Sensor — 2020-2025 Toyota Highlander

Replacing an oxygen sensor on your 2020-2025 Toyota Highlander is a crucial repair to address poor fuel economy, rough idling, or a check engine light (often codes P0131-P0159). This DIY guide can save you significant labor costs, with parts costing $50-$150 compared to $200-$400 at a shop. With the right tools and our step-by-step instructions, most DIYers can tackle this job confidently. 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.