How to Coolant Flush and Replacement — 2021-2025 Hyundai Elantra

Flushing and replacing the coolant in your 2021-2025 Hyundai Elantra is crucial to prevent engine overheating and corrosion, especially as part of routine maintenance every 60,000 miles or 5 years. This DIY repair can save you money with parts costing between $20-$40 compared to shop costs of $100-$150, and with the right tools and steps, most DIYers can tackle it confidently. DIY Cost: $20-$40 | Shop Cost: $100-$150

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.