How to Replace the 12V Battery — 2010-2025 Toyota 4Runner

Replacing the 12V battery in your 2010-2025 Toyota 4Runner is a straightforward task needed when you experience slow cranking, dim lights, or a battery over 3-5 years old. This DIY repair can save you money with parts costing $100-$200 compared to a shop cost of $150-$300 including labor. With basic tools and this guide, any DIYer can confidently tackle this job in under an hour. DIY Cost: $100-$200 | Shop Cost: $150-$300

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.