TSB: Coolant leakage at front exhaust pipe (Prius & Prius Prime)

Thanks - could we assume this would only refer to cars with Exhaust Heat Recirculation System?

 

Thank you for the notification. I looked up Toyota's California emission warranty and it wasn't clear to me how long this particular problem would be warranted for. Do you know whether this problem would be covered by Toyota's "long term emission defect" warranty? I see online that to get the 7 year/70,000 mile warranty, it would have to be a problem with a listed, specific part. Is the "front exhaust pipe heat exchanger" noted in the service bulletin the same thing as "exhaust front pipe (including catalytic converter)" noted on page 25 of the warranty booklet? Just trying to figure out how long I've got to have this potential problem looked into....
Thanks again.
EDIT: I looked at your included link and saw the warranty period. Thanks again for posting this information.

 

Unfortunately i noticed i was loosing coolant. I had just so happened to have a Blackstone labs analysis done 1000 miles prior so i knew it wasn't in the oil. I used one of those Block Tester Exhaust Leak tests and that passed. So after some quick digging i found this post with the TSB. Of course in NH Emissions warranty is only 80K and im at 101K so this was out of pocket. Parts at MSRP is 1183.76 but if i ordered them myself online at my dealer the discount on parts brought the parts total down to 874.98. Labor was 228.38. So if you need this done outside of warranty, look to spend around 1100. At least i get a new cat so i don't need to worry about the second one. A local yard will give me about 130 for the old cat so i guess better than nothing. Took some pictures and video(Youtube) for anyone interested in seeing how the actuator opens and closes to either route hot exhaust through the exchanger or straight through the submuffler.

 

I own 2016 Prius Two.
Dealer replaced Exhaust pipe in Sep 2022 using T-SB-0135-19 free of charge

Service notes says coolant is low, it is not saying anything related to coolant leakage test.
now I have 51K and engine stopped working due to overheat
emitted P00B111, P011511, P148F AND P319000

P148F and T-SB-0135-19 are clearly connected.

 

Just to add a data point.

My 2016 with 100k miles just had the same issue. Coolant was dropping about 1 inch every month.

Dealer is ordering the parts and will repair it under California Emission warranty.

Thank you OP for the post. I printed the TSB and handed it over to the service advisor. He said it was helpful.