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Ford Use of Bosch CP4 Fuel Pump in Diesel Vehicles Class Action

Ford 2017 F-350 Truck

The complaint for this class action is a massive document of over 860 pages. It alleges that Ford knew it should not use Bosch’s CP4 fuel pump in its diesel vehicles, but did so anyway. What was wrong with the CP4? Because US diesel fuel differs from European, the fuel pump does not work as it’s intended and eventually causes engine damage.

The class for this action is all persons who bought or leased a model year 2011 to 2019 Ford vehicle fitted at any time with a Bosch CP4 fuel pump.

The CP4 is a high-pressure fuel injection pump designed to work in diesel engines. According to the complaint, the CP4 “uses less fuel by exerting higher fuel pressures, and is cheaper to manufacture than its predecessor, the CP3. The CP4 fuel pump gave Ford a way to profit by advertising the trucks’ superior fuel efficiency, while also being able to tout the reliability and durability that diesel vehicles are known for.” Ford promised potential customers improved torque, horsepower, durability, and fuel economy.

Unfortunately, American diesel fuel is not the same as the European version; it is cleaner. That means that it provides less lubrication. The complaint says, “The cleaner, thinner diesel allows air pockets to form inside the pump during operation, causing metal to rub against metal, generating metal shavings which are dispersed throughout the fuel injection system, contaminating and destroying the fuel system and indeed the entire engine.”

Eventually, the engine “catastrophically fails without warning.” The engine abruptly shuts off while the vehicle is in motion, the complaint says, and cannot be restarted. This poses a danger to drivers, passengers, and others on the road.

The repair bill ranges from $8,000 to $20,000, the complaint says. 

Ford knew that the fuel pump would be a problem, the complaint alleges, because it had problems with fuel injection pumps in the 1990s. “By 2002, the Truck & Engine Manufacturers Association (“EMA”)—of which Ford is a member company—acknowledged that the lower lubricity of American diesel could cause catastrophic failure in high-pressure fuel injection system components that are made to European diesel specifications.”

The complaint says that Ford has tried to blame the engine problems on its customers, claiming that they used contaminated or substandard fuel. The complaint says Ford “instructed its authorized repairpersons as to the most effective ways of avoiding good-faith claims for warranty coverage” when the fuel pumps cause damage.

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