How to Replace the Serpentine Belt — 2020-2025 Toyota Highlander

Replacing the serpentine belt on your 2020-2025 Toyota Highlander is a crucial maintenance task to prevent accessory drive failure, often needed every 60,000-100,000 miles or if you hear squealing or notice belt wear. This DIY repair can save you money, costing about $30-$50 for parts compared to $100-$200 at a shop. With basic tools and this guide, most DIYers can tackle this job confidently. DIY Cost: $30-$50 | Shop Cost: $100-$200

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.