How to Transmission Fluid Change — 2021-2025 Hyundai Elantra

Changing the transmission fluid in your 2021-2025 Hyundai Elantra is a key maintenance task to ensure smooth shifting and extend the life of your transmission, especially if you notice rough shifts or hit the 60,000-mile mark. This DIY repair can save you big, costing around $50-$80 for fluid and tools compared to $150-$250 at a shop. With clear steps and basic tools, most DIYers can tackle this job confidently. 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.