Ford · Known Issues

2018 Ford F-150 Problems: 13 Issues Every Owner Should Know

2018 model year · 8,296+ owner reports · Updated June 2026

According to Au7o's analysis of 8,296+ owner reports, the 2018 Ford F-150 has 13 documented known issues, with 5 rated critical. The most serious are Brake Vacuum Pump Failure (EcoBoost) ($300-$800 repair), Brake master cylinder fluid leak / loss of front brake function ($0-$600 repair), 3.5L EcoBoost cam phaser rattle on cold start ($800-$3,600 repair), 10R80 10-speed transmission harsh/erratic shifting and torque-converter shudder ($150-$4,500 repair) and Front seat belt pretensioner fire risk ($0-$0 repair). The most commonly reported issue is 10-Speed Transmission Shudder/Harsh Shifts with 2,800 owner reports. Across all issues, repair costs range from $100 to $4,500. DIY maintenance guides at au7o.io.

All 13 Known Issues

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Community Reported

680 owners

On the 2015-2020 Ford F-150, the vacuum pump that provides brake assist on EcoBoost F-150s can fail, resulting in a hard brake pedal and reduced braking assist. Since turbo engines don't produce intake vacuum like naturally aspirated engines, they rely on this pump.

This issue also affects: Ford Explorer, Ford Flex, Ford Transit

Common Symptoms

Hard brake pedal
Increased stopping distance
Brake warning light
Whining noise from pump area
Reduced brake assist

How to Fix

Replace vacuum pump. This is a safety-critical repair - do not drive with failed pump. Check for diagnostic codes related to brake booster. Inspect vacuum lines for leaks as well.

What Owners Are Using

Parts and tips from 680+ owners who fixed this issue

NoteThis is a high-severity issue - ignoring it can lead to costly repairs or safety concerns. Address it promptly.
TipGet a proper diagnosis before replacing parts - similar symptoms can have different causes
TipSearch Ford F-150 forums and owner groups for real-world experiences and DIY guides
TipGet multiple quotes from independent mechanics - dealer prices can be 2-3x higher for the same repair
UpgradePremium ceramic brake pads for quiet, low-dust braking performance (Wagner ThermoQuiet Ceramic Brake Pads)
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UpgradeDrilled and slotted brake rotors for improved heat dissipation and stopping power (StopTech Sport Drilled/Slotted Brake Rotor)
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Typical repair cost:$300 - $800

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High Confidence680 reportsLast reported by owners Feb 2024Reviewed Feb 2026

On the 2017-2018 Ford F-150 3.5L EcoBoost V6, the brake master cylinder rear cup seal can roll or the cylinder can develop an internal/external leak, allowing brake fluid to migrate from the front-circuit reservoir into the vacuum brake booster. This causes a longer/softer pedal, increased pedal effort, and reduced or lost front-brake function, lengthening stopping distance and raising crash risk. This recurred across several recalls on F-150 trucks: 2013-2014 trucks (NHTSA 16V-345 / Ford 16S24) and 2017-2018 3.5L EcoBoost trucks (NHTSA 25V-236 / Ford 25S37, with predecessors 20S31 and 22V-150).

This issue also affects: Ford Transit, Ford Expedition

Common Symptoms

Soft, low, or sinking brake pedal
Increased pedal effort / reduced front braking
Longer stopping distances
Brake fluid level dropping with no obvious external leak
Brake warning light

How to Fix

This is a free recall remedy. Dealers replace the brake master cylinder and, if it has already leaked into the booster, replace the brake booster as well, at no cost. Owners should check their VIN on the NHTSA or Ford recall lookup and have any open brake recall performed immediately; do not ignore a soft or sinking brake pedal.

Typical repair cost:$0 - $600

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High ConfidenceVerified0 reportsLast reported by owners Invalid DateReviewed Jun 2026

On the 2017-2020 Ford F-150 3.5L EcoBoost V6 (twin-turbo GTDI), second-gen 3.5L EcoBoost engines develop a loud rattle/knock from the front timing cover for 2-5 seconds on cold start (and sometimes at idle). The variable-cam-timing (VCT) phasers have a lock pin that fails to engage on startup, allowing the phaser to rattle against the cam sprocket. Over time the phasers and timing chain wear, which can throw cam/crank correlation codes and, if ignored, lead to further timing component damage. Ford acknowledged it in service bulletins and a Customer Satisfaction Program with an extended warranty.

This issue also affects: Audi A4, Audi A5, Audi A6

Common Symptoms

Loud rattle or knock from front of engine for 2-5 seconds on cold start
Rattle/ticking at idle once warm in worse cases
Rough idle or check-engine light with cam timing codes
Noise worse after the engine sits 6+ hours

How to Fix

Ford issued a PCM reflash (program 21B10) to change startup oil-pressure behavior and reduce phaser rattle, and Customer Satisfaction Program 21N03 to replace the cam phasers if the noise persists. Out of program, replacement of all four phasers plus timing chains/guides is a ~10-hour job. Replace phasers and timing chain set; use full-synthetic oil and stick to oil-change intervals to preserve VCT oil pressure.

Typical repair cost:$800 - $3,600

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Community Reported

920 owners

On the 2015-2020 Ford F-150, the EcoBoost engines can develop oil leaks from the oil pan gasket. The leak often appears at the rear of the oil pan and can drip onto exhaust components, causing a burning oil smell. This is common on trucks with higher mileage.

This issue also affects: Ford Bronco, Ford Explorer, Ford Flex

Common Symptoms

Oil spots under truck
Burning oil smell
Low oil level
Oil visible on oil pan
Smoke from under truck

How to Fix

Replace oil pan gasket. The repair is labor-intensive as the subframe often needs to be lowered for access. Use OEM gasket for best results. Clean oil pan and block mating surfaces thoroughly.

What Owners Are Using

Parts and tips from 920+ owners who fixed this issue

UpgradeUse OEM gasket
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TipConsider OEM parts for critical components like sensors and electrical parts - aftermarket can be unreliable
TipGet a proper diagnosis before replacing parts - similar symptoms can have different causes

Typical repair cost:$400 - $1,200

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High Confidence920 reportsLast reported by owners Feb 2024Reviewed Feb 2026

On the 2018-2020 Ford F-150 5.0L Coyote V8 (Gen 3), third-generation 5.0L Coyote V8 trucks consume oil at an abnormally high rate (greater than ~1 quart per 3,000 miles) with no visible external leaks. Ford TSB 19-2365 attributes it to high intake-manifold vacuum during deceleration fuel shut-off pulling oil past the rings/valve guides and through the PCV system into the combustion chamber. Owners report having to top off oil between changes and risk running low if they do not monitor it. A class action alleges Ford's 'fix' (a lower dipstick mark) masks rather than cures the consumption.

Common Symptoms

Burning more than ~1 quart of oil per 3,000 miles
Low-oil warnings between oil changes
No visible oil leaks under the truck
Occasional light blue exhaust smoke / fouled plugs

How to Fix

Ford's TSB 19-2365 remedy is a PCM reflash to reduce deceleration vacuum, plus a revised oil-level dipstick and an oil/filter change. Owners should check oil frequently and top off as needed. Persistent consumption beyond the reflash may require dealer documentation of consumption tests under powertrain warranty; severe cases involve PCV/valve-guide or short-block work.

Typical repair cost:$0 - $2,000

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1,200 owners

On the 2018-2021 Ford F-150 5.0L V8, the 5.0L Coyote V8 can develop a ticking or rattling noise at startup, often from the cam phasers. This is similar to issues in the Mustang GT. The noise typically diminishes after the engine warms up but can indicate phaser wear.

This issue also affects: Audi A4, Audi A5, Audi A6

Common Symptoms

Ticking noise at cold startup
Rattle from top of engine
Noise diminishes when warm
Louder in cold weather
Check engine light in severe cases

How to Fix

Use quality synthetic oil and change regularly. Ford updated cam phaser design for later production. If noise is excessive, cam phaser replacement may be needed. Check for TSBs specific to your build date.

What Owners Are Using

Parts and tips from 1,200+ owners who fixed this issue

UpgradeUse quality synthetic oil
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TipUse quality synthetic oil and change regularly.
TipGet a proper diagnosis before replacing parts - similar symptoms can have different causes

Typical repair cost:$0 - $2,500

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High Confidence1,200 reportsLast reported by owners Feb 2024Reviewed Feb 2026

On the 2017-2023 Ford F-150, the 10R80 10-speed automatic (introduced on the 2017 F-150) is widely reported to shift harshly: jerking, clunking, banging on the 1-2 and 2-3 shifts, hesitation, gear hunting, and occasional limp-mode with a 'Transmission Not in Park' or 'drive mode not available' message. Many trucks also exhibit a torque-converter lockup-clutch shudder felt as a vibration around 30-45 mph. Root causes traced in later TSBs include adaptive-calibration mismatch during break-in, CDF drum bushing migration, and valve-body bore wear/scoring. A class action (O'Connor v. Ford, N.D. Illinois) covers the defect.

This issue also affects: Acura CL, Acura MDX, Acura TL

Common Symptoms

Harsh 1-2/2-3 upshifts that jerk or clunk
Loud bang/clunk when starting the truck
Hesitation, gear hunting, or slipping
Vibration/shudder at 30-45 mph (torque-converter lockup)
Limp mode or 'drive mode not available' message

How to Fix

Start with a Ford PCM/TCM reflash to the latest calibration and an adaptive-learning relearn drive cycle (early TSBs 18-2079/18-2274, later 23-2250 superseded by 24-2046). For shudder, a transmission fluid service with Mercon ULV plus friction modifier helps. Persistent harsh shifts with valve-body bore damage require main control valve body replacement (TSB 22-2428). Severe cases need converter or transmission overhaul.

Typical repair cost:$150 - $4,500

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Community Reported

2,800 owners

On the 2017-2023 Ford F-150, the 10R80 10-speed automatic transmission can develop a shudder during light acceleration, typically between 25-50 mph. This is caused by torque converter clutch issues and affects many F-150s. Ford has released multiple TSBs and fluid updates to address this.

This issue also affects: Acura MDX, Audi A4 Avant, Audi A4

Common Symptoms

Shudder during light acceleration
Harsh or jerky shifts
Vibration between 25-50 mph
Clunk when shifting at low speeds
Shudder disappears under heavy throttle

How to Fix

Perform transmission fluid flush with Motorcraft Mercon ULV and add Ford friction modifier. Adaptive learning reset via FORSCAN or dealer may help. Multiple fluid changes sometimes needed. In severe cases, torque converter replacement required under warranty extension.

What Owners Are Using

Parts and tips from 2,800+ owners who fixed this issue

TipGet a proper diagnosis before replacing parts - similar symptoms can have different causes
TipSearch Ford F-150 forums and owner groups for real-world experiences and DIY guides
TipGet multiple quotes from independent mechanics - dealer prices can be 2-3x higher for the same repair
UpgradeTransmission flush kit for complete fluid exchange to address shudder (Liqui Moly Transmission Flush Kit)
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UpgradeFull synthetic ATF designed to reduce shudder in automatic transmissions (Valvoline MaxLife ATF Full Synthetic)
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Typical repair cost:$200 - $3,500

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On the 2015-2018 Ford F-150, when a front seat belt pretensioner deploys in a crash, it can generate excessive sparks/hot gas that ignites insulation, carpet, or wiring inside the B-pillar, potentially starting a vehicle fire. Ford recalled about 2 million 2015-2018 F-150 trucks (about 1.6 million in the U.S.) after 23 reports of smoke or fire in North America, including several trucks destroyed by fire. NHTSA campaign 18V-568 (Ford 18S33).

Common Symptoms

Smoke or fire from the B-pillar area after a crash/pretensioner deployment
Burning smell after airbag/seat belt deployment

How to Fix

Free recall remedy: dealers remove flammable insulation material and tape remnants in the B-pillar on both sides and apply heat-resistant tape and/or coatings so a pretensioner deployment cannot ignite surrounding material. Owners should verify the recall is completed via VIN lookup.

Typical repair cost:$0 - $0

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Community Reported

876 owners

On the 2015-2020 Ford F-150, the two-piece driveshaft uses a center support (carrier) bearing that can wear out, causing vibration and noise. The rubber support degrades over time, especially in hot climates or with heavy towing. Ford TSB addresses this issue.

This issue also affects: BMW M3, Cadillac Escalade, Ford F-250 Super Duty

Common Symptoms

Vibration at highway speeds (40-70 mph)
Humming or howling noise from underneath
Vibration worse under load
Visible cracking in carrier bearing rubber
Clunking when shifting into gear

How to Fix

Replace the carrier bearing assembly ($150-300 parts). Consider upgrading to a heavy-duty carrier bearing if towing frequently. The job requires dropping the driveshaft and is about 2-3 hours labor. Some owners upgrade to aftermarket carrier bearings with greaseable Zerk fittings for longer life.

What Owners Are Using

Parts and tips from 876+ owners who fixed this issue

UpgradeUpgrade to aftermarket carrier bearing
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TipDIY repairs can save significantly - dealer charges $150-300 but DIY costs are typically 50-70% less
TipConsider OEM parts for critical components like sensors and electrical parts - aftermarket can be unreliable
TipGet a proper diagnosis before replacing parts - similar symptoms can have different causes

Typical repair cost:$300 - $700

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High ConfidenceVerified876 reportsLast reported by owners Feb 2024Reviewed Feb 2026

Community Reported

720 owners

On the 2017-2021 Ford F-150 3.5L EcoBoost, the water pump on the 3.5L EcoBoost can fail or develop leaks, causing coolant loss and potential overheating. The pump is internal and driven by the timing chain, making replacement labor-intensive.

This issue also affects: Audi A4, Audi A5, Audi A6

Common Symptoms

Coolant leak
Overheating
Low coolant warning
Sweet coolant smell
White residue near pump

How to Fix

Replace water pump when symptoms appear. Consider timing chain inspection/replacement at same time if high mileage. Replace thermostat while accessible. Ensure proper cooling system bleeding after repair.

What Owners Are Using

Parts and tips from 720+ owners who fixed this issue

TipGet a proper diagnosis before replacing parts - similar symptoms can have different causes
TipSearch Ford F-150 forums and owner groups for real-world experiences and DIY guides
TipGet multiple quotes from independent mechanics - dealer prices can be 2-3x higher for the same repair
UpgradeGates water pump — OE-quality replacement with gasket (Gates Water Pump)
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UpgradeGMB water pump — reliable OEM alternative (GMB Water Pump)
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UpgradeGates coolant hose — OEM-grade reinforced rubber (Gates Coolant Hose)
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UpgradePrestone 50/50 pre-mixed coolant — compatible with all colors (Prestone Coolant Antifreeze 50/50)
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Typical repair cost:$800 - $2,000

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High Confidence720 reportsLast reported by owners Feb 2024Reviewed Feb 2026

On the 2015-2020 Ford F-150, f-150 trucks equipped with the large twin-panel (panoramic) sunroof have reports of the tempered glass spontaneously shattering or 'exploding' with a loud bang, sometimes at highway speed, raining glass into the cabin. Owners and a class action attribute it to the ceramic enamel paint band on the glass edge weakening the tempered panel combined with stress from the large opening and track hardware. Ford has not issued a recall, so repairs are usually out of pocket or via insurance.

Common Symptoms

Loud bang/gunshot-like noise followed by shattered sunroof glass
Glass fragments falling into the cabin
Cracking radiating from the edge of the glass panel
Broken sunroof shade track clips / shade won't move

How to Fix

There is no recall remedy; replacement of the shattered glass panel (and any damaged track/shade hardware) is the fix, typically through a Ford dealer, a glass shop, or insurance comprehensive coverage. Some owners pursue goodwill assistance from Ford or join the class action. Inspect the sunroof shade track plastic clips, which also fail on these trucks.

Typical repair cost:$500 - $1,500

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1,100 owners

On the 2015-2023 Ford F-150, the HVAC blend door actuators can fail, causing clicking noises from the dashboard and inability to control air temperature. Air may blow only hot or only cold regardless of settings. Multiple actuators are used and any can fail.

This issue also affects: Dodge Stratus, Ford Mustang

Common Symptoms

Clicking from dashboard
HVAC only blows hot
HVAC only blows cold
Temperature doesn't change
Air from wrong vents

How to Fix

Replace failed blend door actuator. Actuators are located behind dashboard and require some disassembly. Consider replacing multiple actuators if one fails as others may follow. OEM parts recommended.

What Owners Are Using

Parts and tips from 1,100+ owners who fixed this issue

TipConsider OEM parts for critical components like sensors and electrical parts - aftermarket can be unreliable
TipGet a proper diagnosis before replacing parts - similar symptoms can have different causes
TipSearch Ford F-150 forums and owner groups for real-world experiences and DIY guides
TipGet multiple quotes from independent mechanics - dealer prices can be 2-3x higher for the same repair
UpgradeProfessional Bluetooth OBD-II scanner for reading electrical system fault codes (BlueDriver Bluetooth Pro OBD2 Scan Tool)
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UpgradeAutomotive digital multimeter for diagnosing electrical faults and testing circuits (Innova 3340 Automotive Digital Multimeter)
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UpgradeElectrical contact cleaner for restoring connections and preventing corrosion (CRC QD Electronic Cleaner)
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Typical repair cost:$100 - $500

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Frequently Asked Questions

What are the most common Ford F-150 problems?

According to Au7o's analysis of 8,296+ owner reports, the 2018-2018 Ford F-150 has 13 documented issues. The most frequently reported are: Brake Vacuum Pump Failure (EcoBoost), Brake master cylinder fluid leak / loss of front brake function, 3.5L EcoBoost cam phaser rattle on cold start. Of these, 5 are rated critical and should be addressed promptly.

Is the Ford F-150 reliable?

The 2018-2018 Ford F-150 has 13 known issues documented across 8,296+ owner reports. 5 issues are rated critical: Brake Vacuum Pump Failure (EcoBoost) and Brake master cylinder fluid leak / loss of front brake function and 3.5L EcoBoost cam phaser rattle on cold start and 10R80 10-speed transmission harsh/erratic shifting and torque-converter shudder and Front seat belt pretensioner fire risk. 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 F-150 problems?

Repair costs for known Ford F-150 issues range from $0 to $4,500, depending on the specific problem and whether you choose DIY or professional repair. The most critical issue, Brake Vacuum Pump Failure (EcoBoost), typically costs $300-$800 to repair. Au7o provides step-by-step DIY maintenance guides that can help reduce repair costs.

What is the 2015-2020 Ford F-150 Brake Vacuum Pump Failure (EcoBoost)?

The vacuum pump that provides brake assist on EcoBoost F-150s can fail, resulting in a hard brake pedal and reduced braking assist. Since turbo engines don't produce intake vacuum like naturally aspirated engines, they rely on this pump. Repairs typically run $300-$800. Severity: high.

What is the 2017-2018 Ford F-150 Brake master cylinder fluid leak / loss of front brake function?

The brake master cylinder rear cup seal can roll or the cylinder can develop an internal/external leak, allowing brake fluid to migrate from the front-circuit reservoir into the vacuum brake booster. This causes a longer/softer pedal, increased pedal effort, and reduced or lost f… Repairs typically run $0-$600. Severity: high.

All 13 Known Issues

2015-2020 Ford F-150: Brake Vacuum Pump Failure (EcoBoost)#

Common Symptoms

How to Fix

What Owners Are Using

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2017-2018 Ford F-150: Brake master cylinder fluid leak / loss of front brake function#

Common Symptoms

How to Fix

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2017-2020 Ford F-150: 3.5L EcoBoost cam phaser rattle on cold start#

Common Symptoms

How to Fix

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2015-2020 Ford F-150: EcoBoost Oil Pan Leak#

Common Symptoms

How to Fix

What Owners Are Using

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2018-2020 Ford F-150: 5.0L Coyote (Gen 3) excessive oil consumption#

Common Symptoms

How to Fix

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2018-2021 Ford F-150: 5.0L Coyote Cam Phaser Tick/Rattle#

Common Symptoms

How to Fix

What Owners Are Using

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2017-2023 Ford F-150: 10R80 10-speed transmission harsh/erratic shifting and torque-converter shudder#

Common Symptoms

How to Fix

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2017-2023 Ford F-150: 10-Speed Transmission Shudder/Harsh Shifts#

Common Symptoms

How to Fix

What Owners Are Using

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2015-2018 Ford F-150: Front seat belt pretensioner fire risk#

Common Symptoms

How to Fix

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2015-2020 Ford F-150: Driveshaft Carrier Bearing Failure#

Common Symptoms

How to Fix

What Owners Are Using

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2017-2021 Ford F-150: Water Pump Leak/Failure (3.5L EcoBoost)#

Common Symptoms

How to Fix

What Owners Are Using

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2015-2020 Ford F-150: Panoramic / twin-panel sunroof spontaneous shattering#

Common Symptoms

How to Fix

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2015-2023 Ford F-150: HVAC Blend Door Actuator Failure#

Common Symptoms

How to Fix

What Owners Are Using

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Other Ford Models

Frequently Asked Questions

What are the most common Ford F-150 problems?

Is the Ford F-150 reliable?

How much does it cost to fix common Ford F-150 problems?

What is the 2015-2020 Ford F-150 Brake Vacuum Pump Failure (EcoBoost)?

What is the 2017-2018 Ford F-150 Brake master cylinder fluid leak / loss of front brake function?

What is the 2017-2020 Ford F-150 3.5L EcoBoost cam phaser rattle on cold start?

What is the 2017-2023 Ford F-150 10R80 10-speed transmission harsh/erratic shifting and torque-converter shudder?

What is the 2015-2018 Ford F-150 Front seat belt pretensioner fire risk?

What is the 2017-2023 Ford F-150 10-Speed Transmission Shudder/Harsh Shifts?

What is the 2015-2020 Ford F-150 EcoBoost Oil Pan Leak?

What is the 2015-2020 Ford F-150 Driveshaft Carrier Bearing Failure?

What is the 2017-2021 Ford F-150 Water Pump Leak/Failure (3.5L EcoBoost)?

What is the 2015-2020 Ford F-150 Panoramic / twin-panel sunroof spontaneous shattering?

What is the 2018-2020 Ford F-150 5.0L Coyote (Gen 3) excessive oil consumption?

What is the 2018-2021 Ford F-150 5.0L Coyote Cam Phaser Tick/Rattle?

What is the 2015-2023 Ford F-150 HVAC Blend Door Actuator Failure?