Toyota Must Expand CSP ZJC to Cover All Defective UA80 Transmissions

Owners of 2017–2022 Toyota Highlanders, 2017–2020 Siennas, and 2018–2020 Camrys are experiencing serious transmission issues—including high-pitched whining, erratic shifting, clunks, hesitation, and premature failure. These vehicles are equipped with the UA80F (AWD) and UA80E (FWD) 8-speed automatic transmissions.

Toyota quietly acknowledged the problem in Technical Service Bulletins T-SB-0160-18, T-SB-0008-21, and a limited Customer Support Program (CSP ZJC)—but only offered coverage to a narrow group of VINs. Thousands of other affected vehicles were left out, even though they show the same exact symptoms.

🔧 What’s the root cause?

According to Gears Magazine, the issue stems from a flawed assembly process involving the counter drive gear support. A locking tab meant to secure a vital retaining nut was not bent properly during factory assembly. This leads to gear movement, internal wear, whining, and eventually failure.

🔗 https://gearsmagazine.com/magazine/the-toyota-ua80-worth-another-look/

📉 The data doesn’t lie:

Over 430 public NHTSA complaints tied to the UA80 platform have been filed—some within warranty mileage, others just beyond. Transmission replacements are frequently delayed until total failure, leaving families stranded or facing $5,000+ in repair bills on vehicles less than 10 years old.

If you’ve experienced any of these issues, I strongly encourage you to file a report with NHTSA:

🔗 https://www.nhtsa.gov/report-a-safety-problem

Even Wikipedia acknowledges the widespread problems with the UA80 transmission. Under the section titled “UA 80E/F Failures and Problems”, it cites class action lawsuits, TSBs, and Toyota’s limited ZJC program.

🔗 https://en.m.wikipedia.org/wiki/Aisin–Toyota_8-speed_automatic_transmission

📚ConsumerLemonLaw.org has published a detailed article titled “Toyota’s 8-Speed Transmission Problems ”

https://consumerlemonlaw.org/news/toyotas-8-speed-transmission-problems-what-truck-owners-must-know/

🔍 Affected models include:

• 2017–2022 Toyota Highlander

• 2017–2020 Toyota Sienna

• 2018–2020 Toyota Camry (UA80E variant)

💥 We demand Toyota take the following steps:

• Expand CSP ZJC coverage to all UA80F/UA80E-equipped vehicles exhibiting symptoms, regardless of VIN range.

• Authorize diagnostic repairs based on symptom evidence, not full failure.

• Acknowledge the defect publicly and notify all affected owners.

This is a safety issue, a financial burden, and a matter of corporate accountability.

If you’ve experienced transmission issues or simply believe in holding automakers accountable for defective designs, sign and share this petition. 

The UA80 problem is real—and it’s time Toyota steps up. 

⚠️ Update:

I’m seeing your stories come in, and they are heartbreaking. Single parents, families, and hard-working people shouldn’t be facing $8,000 repairs on an acknowledged defect at any mileage — especially while still making payments on the very same vehicle.

This is exactly why this petition exists — to make sure these failures are fully exposed, and owners get justice.