How to Transmission Fluid Change — 2020-2025 Toyota Highlander

Changing the transmission fluid in your 2020-2025 Toyota Highlander is a key maintenance task to ensure smooth shifting and extend the life of your transmission, especially if you’re noticing rough shifts or hitting the 60,000-mile mark. This DIY job can save you big, costing around $50-$80 in parts compared to $150-$250 at a shop. With the right tools and our step-by-step guide, most DIYers can tackle this with confidence. DIY Cost: $50-$80 | 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.