Mazda class action lawsuit overview:
- Who: Plaintiff Matt Cauller filed a class action lawsuit against Mazda Motor of America Inc. d/b/a Mazda North American Operations and Mazda Motor Corporation.
- Why: Cauller claims Mazda knowingly sold certain vehicles with a dangerous engine defect.
- Where: The class action lawsuit was filed in California federal court.
A new class action lawsuit alleges that Mazda knowingly exposed the purchasers of hundreds of thousands of vehicles to a dangerous engine defect.
Plaintiff Matt Cauller’s class action lawsuit claims Mazda failed to disclose that its SKYACTIV-G 2.5T engines equipped in certain of its model year 2018-2021 Mazda6, 2021-2024 Mazda3 and CX-30, 2016-2023 CX-9, 2019-2024 CX-5, and 2022-2024 CX-50 vehicles were defective.
Cauller says the alleged engine defect causes the engine to leak coolant, which causes the engine to overheat and leads to “catastrophic engine failure.”
“Because of the Engine Defect, Mazda’s advertising about the safety and dependability of the Class Vehicles is untrue and materially misleading,” the Mazda class action says.
Cauller wants to represent a class of South Carolina consumers who purchased or leased in the state a class vehicle with a SKYACTIV-G 2.5T engine.
Mazda admits existence of engine defect, class action claims
Mazda has admitted to the existence of the engine defect via a series of technical service bulletins, yet has failed to warn consumers, extend the vehicles’ warranty, or issue a recall, the Mazda class action alleges.
“Mazda has long known of the Engine Defect. It has amassed years of research, data, and Engine Defect warranty claims,” the Mazda class action claims.
Cauller claims Mazda is guilty of unjust enrichment and fraudulent omission and violating South Carolina’s Unfair Trade Practices Act and state codes regarding breach of express warranty and breach of implied warranty of merchantability.
The plaintiff demands a jury trial and requests declaratory and injunctive relief and an award of actual and statutory damages for himself and all class members.
A group of consumers filed a separate class action lawsuit against Mazda earlier this year over claims the automaker sold certain vehicles equipped with defective infotainment systems.
Have you purchased a Mazda vehicle equipped with a SKYACTIV-G 2.5T engine? Let us know in the comments.
The plaintiffs are represented by Timothy G. Blood, Paula R. Brown and Jennifer L. MacPherson of Blood Hurst & O’Reardon, LLP and W. Daniel “Dee” Miles, III, H. Clay Barnett, III, J. Mitch Williams, Dylan T. Martin and Trent H. Mann of Beasley, Allen, Crow, Methvin, Portis & Miles, P.C.
The Mazda class action lawsuit is Cauller, et al. v. Mazda Motor of America Inc., Case No. 8:24-cv-01807, in the U.S. District Court for the Central District of California.
Don’t Miss Out!
Check out our list of Class Action Lawsuits and Class Action Settlements you may qualify to join!
Read About More Class Action Lawsuits & Class Action Settlements:
657 thoughts onMazda class action claims thousands of vehicles have engine defect
2019 CX 5 skyactiv 44,000 miles, regularly maintained. Same issue! Would like to be added to the lawsuit , unfortunately. I was loving my vehicle til now.
Bought a 2022 mazda 5 with the 2.5 engine, have to top up coolant every time I do an oil change.
I am another owner facing the well-documented coolant intrusion issue with the 3.7L V6 engine. My car is currently at the auto shop and I’m faced with how to move forward.
Just a few months after proudly paying off my 2014 CX-9, the engine was destroyed by coolant mixing with the oil. I am now facing a repair quote of over $6000 for a new engine—a catastrophic cost for a vehicle I just finished paying for.
This was not a gradual failure. It happened suddenly and without warning, directly mirroring the defects described in the TSB and previous lawsuits for the 2010-2015 model years.
I have contacted Mazda Corporate (on 10/8/25) but have yet to receive a substantive update. It is incredibly disheartening to be left in financial limbo due to a known manufacturing flaw.
If you are in a similar situation, please file a complaint. The more of us who speak up, the harder it is for Mazda to ignore this widespread problem. If a lawyer would like to contact me please do!