Abraham Jewett  |  August 26, 2024

Category: Auto News
Close up of Mazda emblem on a front bumper, representing the Mazda class action.
(Photo Credit: OATZ To Go FACTORY/Shutterstock)

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.


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520 thoughts onMazda class action claims thousands of vehicles have engine defect

  1. Kyle says:

    I own a 2018 cx9 gt that had this exact problem. Crack cylinder head. The head cracked where the exhaust manifold bolts to the cylinder head. There’s not enough material on the cylinder head to support the weight of the exhaust manifold and turbo. It’s a casting defect during production and mazda knew about it and didn’t issue a recall because they deemed it to not be safety related. It cost me $4,000 out of pocket to replace the cylinder head with a revised version. The knew about it that much that they made a revision to the cylinder head. I want my money back for the cost of the repair.

  2. Jeffrey W Moorhouse says:

    Can I be contacted if this affects me please

  3. Jeffrey W Moorhouse says:

    I have a mazda cx50 2024 I guess this could affect me

  4. JR says:

    I JUST purchased a brand new Mazda 3 THIS WEEK. Wish I had seen this article two weeks ago. Please keep me updated!!!

    1. Shong says:

      Do not always trust what you read. As long as there is warranty its ok

  5. Gina Tooth says:

    I purchased a 2023 Mazda CX-5

  6. Jeanne M Harding says:

    I have the Mazda cx30 skyactiv. More information please. I bought it a month ago.

  7. Nancy J Culp says:

    I have a 2024 cx5 2.5 turbo

    1. Scott phillion says:

      I purchased a Mazda 4 with the 2 5 L engine I’ve had no problems with the car so far it has 26,000 miles when does this problem usually start.

      1. Kyle says:

        Mine didn’t start til I hit 85k miles. Then I was out of warranty and had an almost $8k repair bill. I wound up paying $4k out of pocket for it. Mazda knows what wins are effected.

  8. Amy says:

    Please keep me updated. I have a 2024 cx30 that randomly gives me error messages.

  9. Gregory Dodd says:

    Purchased a new CX-30 Preferred, off the lot about 7 weeks ago and have experienced severe buyer’s remorse. After one month of ownership, I see the writing on the wall with this car and with a dealer unwilling to work with me and also the feeling Mazda and the dealership I did business with misrepresented their products, I would be open to information about this lawsuit.

  10. Tina Smith says:

    I have a 2023 turbo cx50, does this affect me?

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