A timing belt hidden inside Ford’s engine oil could trigger costly failures in 135,000 vehicles under investigation

A warning light may come too late

Driving a Ford EcoBoost model can end with a sudden engine failure. A driver on a major highway in Wilmington, Delaware, reported that the oil pressure light came on shortly before a 2017 Ford Focus lost all power and the engine began to sound like a tank.

NHTSA said some complaints allege a low-oil-pressure warning light immediately before a complete or reduced loss of motive power. Other complaints allege sudden loss of power or engine seizure with no warning. That timing can leave drivers little time to react safely.

The government investigates 135,000 Ford vehicles

Federal safety regulators are investigating about 135,000 Ford vehicles. The National Highway Traffic Safety Administration upgraded its review of certain Ford Fiesta, Focus, and EcoSport models equipped with the 1.0-liter EcoBoost engine.

The investigation examines whether timing belt degradation can reduce oil pressure and cause loss of engine power. NHTSA has not determined that every affected vehicle has a defect, but the agency is conducting further engineering analysis.

The unusual design hiding inside the engine

Ford designed this specific 1.0L EcoBoost engine family with a wet timing belt system. Instead of using a traditional timing chain or an external dry belt, the design places the belt inside the engine, where it runs in oil.

That belt-in-oil approach is used to reduce friction and support efficiency goals in small engines. However, NHTSA’s investigation focuses on whether timing belt material can degrade, create debris, clog the oil pump pickup screen, reduce oil pressure, and lead to loss of engine power.

Timing belt debris can damage oil flow

NHTSA’s investigation found that timing belt material may degrade and create debris inside affected Ford 1.0L EcoBoost engines. That debris can clog the mesh oil pump pickup screen and reduce engine oil pressure.

As more debris accumulates, the problem can progress to loss of motive power while driving because the engine lacks proper lubrication. NHTSA is continuing engineering analysis to determine the scope and safety implications of the issue.

Rubber debris can clog the oil pump pickup screen

Timing belt material released into the engine oil may collect on the oil pump pickup screen. If enough debris accumulates, oil pressure can decrease, and the engine may lose lubrication.

NHTSA reported that some drivers experienced low-oil-pressure warnings followed by a loss of engine power. The agency is investigating whether this issue creates an unreasonable safety risk.

Some engines failed before the original service interval

NHTSA data showed reported failures occurred at an average of approximately 70,000 miles. The agency also found that 98% of reported failures occurred before the previous 150,000-mile timing belt replacement interval listed in maintenance information.

Investigators found that some failures occurred despite documented routine oil maintenance. NHTSA is continuing its engineering analysis to determine whether a safety defect exists.

Routine maintenance did not prevent some reported failures

NHTSA found that 98% of reported failures occurred before the previous 150,000-mile timing belt replacement interval. The agency also reported failures in vehicles with evidence of proper, routine oil maintenance.

Investigators are examining whether the timing belt design creates an unreasonable safety risk. NHTSA has not concluded that every maintenance schedule was defective.

Ford changes the timing belt replacement interval

Ford informed NHTSA that a customer satisfaction program would revise the timing belt maintenance interval for affected 1.0L Fox Classic Timing Belt vehicles. The updated interval now recommends 100,000 miles or 6 years, compared with the previous 150,000-mile interval.

The program also provides reimbursement for eligible customers who previously paid for certain timing belt-related engine repairs or replacements.

Ford used a customer satisfaction program while NHTSA investigates

Ford informed NHTSA about a non-safety customer satisfaction program related to the 1.0L Fox Classic Timing Belt. The program includes a revised maintenance interval and reimbursement options for eligible customers who previously paid for qualifying repairs.

NHTSA has not announced a recall for this timing belt investigation. The agency is continuing its engineering analysis to determine whether a safety defect exists.

Automakers sometimes use customer assistance programs

Automakers may use customer satisfaction programs or reimbursement programs to address certain vehicle issues outside of a formal recall process.

Ford’s timing belt investigation includes a customer satisfaction program offering revised maintenance information and reimbursement options for eligible repairs. Whether an issue results in a recall depends on regulatory findings and manufacturer actions.

The affected models are used vehicles

Ford has discontinued the Fiesta, Focus, and EcoSport models in the United States. The vehicles involved in this timing belt investigation are older Fiesta, Focus, and EcoSport models with 1.0L engines from model years between 2014 and 2021.

Because these vehicles are now used models, a major engine repair can create a difficult financial decision for owners. Reuters reported that some drivers described engine failures costing thousands of dollars to fix.

Engine failures can create expensive repair bills

Replacing an engine in an older compact vehicle can cost thousands of dollars, depending on parts, labor rates, and vehicle condition.

Because many affected vehicles are older models with lower resale values, some owners may face repair costs that approach or exceed the vehicle’s market value. NHTSA is investigating whether timing belt degradation can contribute to engine damage and loss of power.

Curious why Ford keeps appearing at the top of recent U.S. recall lists and what’s driving this pattern? Tap through to explore the full breakdown behind it.

Owners may need earlier timing belt service

Ford informed NHTSA that its customer satisfaction program changes the timing belt maintenance interval for affected 1.0L Fox Classic Timing Belt vehicles to 100,000 miles or 6 years.

The program also includes reimbursement options for eligible customers who previously paid for qualifying timing belt-related repairs. NHTSA’s engineering analysis remains open and will determine whether further safety action is needed.

See why Wall Street analysts are becoming more optimistic about Ford stock as earnings trends stabilize and cost-cutting strategies begin to show results.

Ford is facing a timing belt investigation involving 135,000 vehicles. Would you trust a car with a belt running inside its engine oil?

Don’t forget to follow us for more exclusive content right here on MSN

If you liked this, you might also like:

• Why Ford’s Mustang identity may be changing soon
• Why Ford’s $100 million dispute with a California lemon law firm is drawing attention
• A repeat recall is hitting more than 389,000 Ford vehicles after initial repairs didn’t hold up

This slideshow was made with AI assistance and human editing.