Ford F-250 and F-350 Diesel Owners - Class Action Certified Over Defective CP4 Fuel Pumps

What Happened

A federal judge has certified a class action lawsuit against Ford Motor Company over allegedly defective Bosch CP4 high-pressure fuel pumps installed in millions of F-250 and F-350 Super Duty pickup trucks. The certification order, dated September 30, 2026, covers owners in five states and marks a significant advance for truck owners who say the defect cost them thousands of dollars in repairs.

What Is This Lawsuit About?

The case, Droesser v. Ford Motor Company, is pending in the United States District Court for the Eastern District of Michigan, Southern Division (Case No. 2:2019cv12365). The plaintiffs allege that Ford installed a Bosch CP4 high-pressure fuel injection pump in its 6.7L Power Stroke diesel engines that is fundamentally incompatible with the diesel fuel sold in the United States.

According to the complaint, the CP4 pump is designed to tighter tolerances than the diesel fuel quality standards required under U.S. law. When U.S. diesel runs through the pump, the plaintiffs say, the pump's internal components wear prematurely and shed metal shavings into the fuel system. Those particles can travel through the fuel injectors and contaminate the entire fuel system - a failure that can result in engine shutdown while driving and require repairs exceeding $9,000.

Ford disputes the allegations. The company argues that some owners failed to replace their fuel filters on schedule, used excessive diesel exhaust fluid, used poor-quality diesel fuel, or added aftermarket additives that voided their warranty coverage.

Which Trucks and Owners Are Affected?

The class action covers owners of Ford F-250 and F-350 Super Duty trucks equipped with the 6.7L Power Stroke diesel V8 engine, model years 2011 through 2023. The certified class is limited to owners in five states: California, Louisiana, Ohio, Pennsylvania, and South Carolina.

Owners in other states are not part of the certified class at this time. The judge granted class certification on a partial basis, meaning not all claims or all proposed class members were certified.

Where the Case Stands

The September 30, 2026 class certification order is a major procedural milestone - it means the court has determined that the legal claims of affected truck owners share enough common questions of fact and law to proceed together as a group, rather than as thousands of individual lawsuits.

No trial date has been set. The case will now likely proceed through discovery and pretrial motions. Ford may seek to appeal the certification order, a common step in large class action litigation.

The case is led by three nationally recognized plaintiff law firms: Hagens Berman Sobol Shapiro LLP, Hilliard Law, and The Miller Law Firm P.C.

What Owners Should Know

At this stage, no settlement fund exists and no claim form is available. Owners do not need to file anything to remain part of the certified class. If you own a 2011-2023 Ford F-250 or F-350 with the 6.7L Power Stroke diesel and live in one of the five covered states, you are likely part of the class automatically.

If the case results in a settlement or judgment, class members will be notified directly. Owners who do not wish to be part of the class may have the option to opt out if and when notice is sent.

Sources: Hilliard Law press release; Hagens Berman press release; Droesser v. Ford Motor Company, E.D. Mich. Case No. 2:2019cv12365; pickuptrucktalk.com.