2018 Ford Mustang · symptom sheet

Engine overheats or leaks coolant

30owner reports
56,000median miles
$5,000median quote
0involved a crash

Newest report Aug 17, 2026 · checked Sep 19, 2026

60 of the 188 complaints on this car are about the engine. 30 of those describe overheating. Only misfire is reported more often on this car.

Tick what matches of 30 reports

the temperature gauge climbed into the red

coolant is disappearing or on the ground

white smoke from the tailpipe

the heater stopped blowing hot

the dealer found a head gasket or cracked block

the engine was replaced afterward

What got replaced

Owners who name the part that was replaced mention the head gasket (8 reports) and the coolant hose or reservoir (3 reports).

Recalls and investigations

One recall on the engine covers the 2018 model year. A recall on the same system isn't always the same failure, so read the defect text.

18E-035May 24, 2018

Engine And Engine Cooling:Engine:Gasoline:Turbo/Supercharger

Roush Performance Products, Inc. (Roush) is recalling certain aftermarket supercharger kits, part number R1318-6006P1-AA, sold for installation on 2018 Ford Mustangs. The hose barb fittings on the supercharger kits may be manufactured incorrectly, possibly causing damage to the fuel lines and resulting in a fuel leak.

Risk and remedy

Risk: A fuel leak can increase the risk of a fire.
Remedy: Roush will notify the known owners and replace the defective fuel rail subassemblies, free of charge. The recall began on May 31, 2018. Owners may contact Roush customer service at 1-800-597-6874. Roush's number for this recall is REMay2018.

NHTSA investigations into the engine on the Mustang

DP05-005opened Sep 22, 2005

Engine And Engine Cooling · model years 1997 to 2004

Spark plug ejection from cylinder head. Closed jan 4, 2006.

NHTSA summary

ON SEPTEMBER 6, 2005, ODI RECEIVED A PETITION REQUESTING THAT THE AGENCY INVESTIGATE ALLEGATIONS OF ENGINE SPARK PLUG EJECTION IN CERTAIN MODEL YEAR 1997 THROUGH 2004 FORD VEHICLES WITH TRITON V-8 AND V-10 ENGINES.ODI RECEIVED A TOTAL OF 474 NON-DUPLICATIVE COMPLAINTS ON THE SUBJECT VEHICLES WHERE THE COMPLAINANT, OR THE DEALER REPAIRING THE VEHICLE, REPORTED THAT A SPARK PLUG DETACHED FROM THE CYLINDER AND/OR EJECTED FROM THE ENGINE.AS OF DECEMBER 8, 2005, ODI IS NOT AWARE OF ANY ALLEGATIONS WHERE THE ALLEGED DEFECT RESULTED IN A LOSS OF VEHICLE CONTROL, A CRASH, AN INJURY, OR A FATALITY IN ANY OF THE 10,319,810 SUBJECT VEHICLES.IN ADDITION, ODI IS AWARE OF ONLY TWO INCIDENTS WHERE THE VEHICLE STALLED WITHOUT RESTART.INFORMATION CONTAINED IN THE ODI CONSUMER COMPLAINTS AND OBTAINED FROM 72 TELEPHONE INTERVIEWS WITH COMPLAINANTS SHOWED THE FOLLOWING:(1) 99% OF THE COMPLAINTS WERE ON MY 1997 TO 2002 SUBJECT VEHICLES.(2) MOST THE COMPLAINANTS REPORTED HEARING A LOUD POP WHILE DRIVING OR UPON STARTING UP THE VEHICLE FOLLOWED BY A LOUD, REPETITIVE CLICKING OR POPPING SOUND.(3) MANY OF THE COMPLAINANTS REPORTED THAT THE POPPING SOUND WAS ACCOMPANIED BY SOME LOSS OF VEHICLE POWER; HOWEVER, IN 99% OF THE INCIDENTS REPORTED, THE VEHICLE DID NOT STALL.IN THE VERY FEW INCIDENTS WHERE THE VEHICLE DID STALL, MOST VEHICLES COULD BE RESTARTED.(4) ONLY A SMALL PERCENTAGE OF THE COMPLAINANTS CITED THAT THEY SMELLED GAS OR A SLIGHT BURNING SMELL WHEN THE INCIDENT OCCURRED.(5) IN ALL BUT A VER

None of these investigations covers the 2018 model year.

What owners paid

5 of the 30 reports quote a price. Each dot is one quote. The middle half runs $5,000 to $8,200.

$5,000$5,000$8,200

$0k$2k$4k$6k$8k

When it happens

The middle half of failures fell between 40,000 and 66,637 miles, from the 19 reports that gave a mileage.

120

623

524

1025

826

What owners wrote

“2018 WITH 118,000 MILES. Had to get a full block engine replacement due to coolant intrusion into the cylinders. This was diagnosed and replaced at a Ford dealership.”
Filed Aug 17, 2026 · 118,000 miles

“The vehicle was subjected to the âecoboomâ due to Fordâs lack of care when designing the engine. The car blew the head gasket and now requires an engine rebuild.”
Filed Apr 15, 2026

“Random/multiple misfires and cyl 3 misfire (P0300 and P0303). Mechanic used a borescope and found coolant on the walls; visible coolant intrusion in cylinder 3. Coolant has gotten to low levels. Very rough cold start. Mechanic highly recommends to get the engine replaced.”
Filed Jan 10, 2026

“Check engine light came on. Took car to dealership where I learned that the car needs a new engine due to coolant leaking into the cylinders. I later learned this is a "known issue" with this engine, yet Ford has refused to fix or do a recall. The engine could fail or catch on fire if not replaced.”
Filed Jun 9, 2025

Should you keep driving it?

This page can't tell you that. 0 of 30 reports involved a crash. Owners who file are the ones who had a bad experience, and nobody checks their reports. If the problem affects steering, braking, power or a fire risk, treat it as a safety fault and have it inspected before a long or high-speed drive.

File your own report with NHTSA. Complaint counts are how a problem gets an investigation.