What is the 2010-2019 Ford Fusion 6F35 6-Speed Automatic Harsh/Delayed Shifting and Torque Converter Shudder?

The 6F35 six-speed automatic is prone to harsh, banging, or delayed shifts (most often 2-3 and 3-4) plus a shudder/vibration when the torque converter clutch locks up at a steady 40-60 mph cruise. Root causes are worn valve-body separator-plate O-rings and bores that can no longe… Repairs typically run $250-$3,500. Severity: high.

What is the 2010-2019 Ford Fusion AWD Power Transfer Unit (PTU) Overheating and Fluid Leak Failure?

On AWD Fusions the Power Transfer Unit holds only about a quart of gear oil with no dipstick, service interval, or cooling, sitting next to hot exhaust and transaxle. The fluid cooks and breaks down, becoming thick, gummy, and black, and the seals leak. Owners report a burning sm… Repairs typically run $400-$3,100. Severity: high.

What is the 2006-2020 Ford Fusion HVAC Blend Door Actuator Failure - Clicking/Knocking Behind Dash, No Heat or AC?

The plastic gears inside the HVAC blend-door actuator strip out, so the door can no longer move to route air correctly. The classic symptom is a repeated clicking or knocking noise from behind the dash (often at startup or when changing temperature), along with air stuck on one t… Repairs typically run $156-$400. Severity: medium.

Ford · Known Issues

2019 Ford Fusion Problems: 6 Known Issues

2019 model year · 3,290+ owner reports · Updated September 2026

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According to Au7o's analysis of 3,290+ owner reports, the 2019 Ford Fusion has 6 documented known issues, with 5 rated critical. The most serious are 1.5L EcoBoost Coolant Intrusion into Cylinders - Internal Engine Block Failure ($0-$7,000 repair), Hybrid High-Voltage Battery Degradation and Failure ($1,500-$7,000 repair), 6F35 6-Speed Automatic Harsh/Delayed Shifting and Torque Converter Shudder ($250-$3,500 repair), AWD Power Transfer Unit (PTU) Overheating and Fluid Leak Failure ($400-$3,100 repair) and Fusion Backup Camera Displays a Blank Image or Fails to Clear (Recall 25S72 / NHTSA 25V442). The most commonly reported issue is 1.5L EcoBoost Coolant Intrusion into Cylinders - Internal Engine Block Failure with 1,890 owner reports. Across all issues with published estimates, repair costs range from $156 to $7,000. DIY maintenance guides at au7o.io.

All 6 Known Issues

Frequently Asked Questions

What are the most common Ford Fusion problems?

According to Au7o's analysis of 3,290+ owner reports, the 2019 Ford Fusion has 6 documented issues. The most frequently reported are: 1.5L EcoBoost Coolant Intrusion into Cylinders - Internal Engine Block Failure, Hybrid High-Voltage Battery Degradation and Failure, 6F35 6-Speed Automatic Harsh/Delayed Shifting and Torque Converter Shudder. Of these, 5 are rated critical and should be addressed promptly.

Is the Ford Fusion reliable?

The 2019 Ford Fusion has 6 known issues documented across 3,290+ owner reports. 5 issues are rated critical: 1.5L EcoBoost Coolant Intrusion into Cylinders - Internal Engine Block Failure and Hybrid High-Voltage Battery Degradation and Failure and 6F35 6-Speed Automatic Harsh/Delayed Shifting and Torque Converter Shudder and AWD Power Transfer Unit (PTU) Overheating and Fluid Leak Failure and Fusion Backup Camera Displays a Blank Image or Fails to Clear (Recall 25S72 / NHTSA 25V442). Prospective buyers should inspect for these issues and factor potential repair costs into their purchase decision. Regular maintenance following the manufacturer's schedule helps prevent many common problems.

How much does it cost to fix common Ford Fusion problems?

Repair costs for known Ford Fusion issues range from $0 to $7,000, depending on the specific problem and whether you choose DIY or professional repair. The most critical issue, 1.5L EcoBoost Coolant Intrusion into Cylinders - Internal Engine Block Failure, typically costs $0-$7,000 to repair. Au7o provides step-by-step DIY maintenance guides that can help reduce repair costs.

What is the 2014-2019 Ford Fusion 1.5L EcoBoost Coolant Intrusion into Cylinders - Internal Engine Block Failure?

The 1.5L EcoBoost in 2014-2019 Ford Fusion is affected by the same open-deck cylinder block design defect as the Escape. Coolant leaks internally from the block passages into the combustion chambers due to insufficient sealing surface and porous block material that cannot maintai… Repairs typically run $0-$7,000. Severity: high.

2019 Ford Fusion Problems: 6 Known Issues

All 6 Known Issues

2014-2019 Ford Fusion: 1.5L EcoBoost Coolant Intrusion into Cylinders - Internal Engine Block Failure#

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2010-2020 Ford Fusion: Hybrid High-Voltage Battery Degradation and Failure#

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2010-2019 Ford Fusion: 6F35 6-Speed Automatic Harsh/Delayed Shifting and Torque Converter Shudder#

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2010-2019 Ford Fusion: AWD Power Transfer Unit (PTU) Overheating and Fluid Leak Failure#

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2019-2020 Ford Fusion: Fusion Backup Camera Displays a Blank Image or Fails to Clear (Recall 25S72 / NHTSA 25V442)#

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2006-2020 Ford Fusion: HVAC Blend Door Actuator Failure - Clicking/Knocking Behind Dash, No Heat or AC#

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Other Ford Models

Frequently Asked Questions

What are the most common Ford Fusion problems?

Is the Ford Fusion reliable?

How much does it cost to fix common Ford Fusion problems?

What is the 2014-2019 Ford Fusion 1.5L EcoBoost Coolant Intrusion into Cylinders - Internal Engine Block Failure?

What is the 2010-2020 Ford Fusion Hybrid High-Voltage Battery Degradation and Failure?

What is the 2010-2019 Ford Fusion 6F35 6-Speed Automatic Harsh/Delayed Shifting and Torque Converter Shudder?

What is the 2010-2019 Ford Fusion AWD Power Transfer Unit (PTU) Overheating and Fluid Leak Failure?

What is the 2019-2020 Ford Fusion Fusion Backup Camera Displays a Blank Image or Fails to Clear (Recall 25S72 / NHTSA 25V442)?

What is the 2006-2020 Ford Fusion HVAC Blend Door Actuator Failure - Clicking/Knocking Behind Dash, No Heat or AC?