Gen 4 Prius · Emerging Issue

Gen 4 Prius Heat Exchanger Defect

Full breakdown coming soon.

We’ve been documenting this failure pattern in the bay across multiple 2016–2022 Prius vehicles. The detailed write-up — symptoms, diagnostic procedure, repair scope, and parts pathway — is in progress.

In the meantime, if your Gen 4 Prius is showing any of these symptoms:

• Coolant loss without visible external leaks
• Thick white smoke from the tailpipe

Don’t wait for the write-up. Call us.

We can run diagnostics, confirm whether you have the heat exchanger defect, and walk you through your options.