The contact owns a 2018 Lincoln MKC. The contact stated while the vehicle was parked, the contact attempted to start the vehicle however, the message "Engine Coolant Over Temperature" was displayed, and the check engine warning light was illuminated. The vehicle was towed to a dealer and was diagnosed with engine failure. The contact was informed that the engine needed to be replaced. The vehicle…
2018 Lincoln MKC engine problems
moderate 41 complaints filed with NHTSA · avg repair $3,100 · see engine across all vehicles →
Failure mileage
Complaints
41
Recalls
0
Avg fix
$3,100
When does it fail?
Of the 41 engine complaints filed for the 2018 Lincoln MKC, here's the actual mileage breakdown — failures cluster heaviest at 75,000-100,000 mi.
0-25k
25-50k
50-75k
75-100k
100-125k
125-150k
150k+
Each bar shows the share of total complaints filed at that mileage range. Peak failure window highlighted. Some owners report problems earlier; some make it well past 150,000 miles symptom-free. Maintenance habits and driving conditions shift the curve as much as mileage alone.
What stands out
Engine accounts for 63% of every owner complaint on file for this vehicle — the dominant problem area across 3 categories tracked.
Owners have filed 41 engine complaints with NHTSA against this vehicle, but no formal recall covers the issue — the federal record reflects what manufacturers have admitted, not everything owners are reporting.
The failure pattern owners describe
Buyer takeaway: The 2.0L EcoBoost in 2018 Lincoln MKC models has a widespread coolant-intrusion defect affecting engines at 37,000–112,700 miles, often causing complete engine failure requiring $7,000–$17,000+ replacement; NHTSA recall parts have faced serious availability delays, and out-of-warranty repairs fall entirely on the owner with no manufacturer assistance offered.
Owners of 2018 Lincoln MKC models equipped with the 2.0L EcoBoost engine report coolant leaking into the combustion chambers from cracked engine blocks or cylinder heads, a defect that begins showing symptoms between 37,000 and 112,700 miles. The engine develops rough idle, misfires in one or more cylinders, white smoke from the exhaust, and rapidly depleting coolant levels with no visible leaks. Check engine lights illuminate with misfire codes, but initial dealer visits often misidentify the problem as bad spark plugs or ignition coils, delaying correct diagnosis and adding unnecessary repair costs.
Cooling system pressurization tests and borescope inspections confirm coolant inside cylinders and rust pitting on cylinder walls. Owners report long-block replacement costs ranging from $7,000 to $17,240. Some owners have experienced two engine replacements in under three years, with replacement engines carrying identical part numbers to the failed originals, raising concerns about systemic manufacturing issues.
Ford and Lincoln issued Technical Service Bulletin 19-2346 in 2019 documenting this known defect, and NHTSA opened recall campaign 23V378000; however, replacement parts faced months-long backorders with no estimated availability. Out-of-warranty owners receive no manufacturer assistance. Extended warranty programs covered some replacements, but most owners bear the full cost. Owners state dealerships and Lincoln customer service provide no proactive inspection or prevention, leaving them vulnerable to catastrophic engine failure while driving.
Same Lincoln MKC engine reports on nearby years: 2015 · 2016 · 2017 · 2019
Failure modes owners describe
Coolant Intrusion into Cylinders with Cracked Engine Block or Head
Coolant leaks from the engine block or cylinder head into the combustion chambers, causing misfires, rough idle, white exhaust smoke, and low coolant levels. Owners report visible coolant in cylinders on borescope inspection, rust pitting in cylinder walls, and cracked cylinder heads. The defect occurs across multiple EcoBoost variants (2.0L, 1.5L, 1.6L, 2.3L) and appears related to manufacturing or design flaws in the block or head gasket.
When: 37,000 to 112,700 miles; earliest reports at under 50,000 miles; failures occur within months to years of ownership
Symptoms owners cite: Check engine light illuminated; Rough idle and shuddering when cold-starting; Engine misfires (single or multiple cylinders); Excessive coolant consumption with no visible external leaks; White exhaust smoke; Hesitation during acceleration; Engine overheating warning; Abnormal coolant odor in cabin; Low coolant levels requiring frequent top-ups
Codes mentioned: P0300 (Random cylinder misfire), P0301 (Cylinder 1 misfire), P0302 (Cylinder 2 misfire), P0303 (Cylinder 3 misfire), P0304 (Cylinder 4 misfire)
Repairs/costs cited: Long-block engine replacement quoted at $7,000–$17,240. Owners report initial misdiagnosis as spark plug or ignition coil failure before correct diagnosis. Cooling system pressurization test and borescope inspection confirm coolant intrusion. Some replacement engines installed by dealers carry the same block part numbers (e.g., J2GE 6006 AC) as the failed engines they replaced, raising concerns about recurring failures.
Recalls/TSBs owners mention: Technical Service Bulletin 19-2346 and TSB 22-2229 document the issue. NHTSA Campaign 23V378000 initiated a recall; however, parts for the repair were not available for an extended period. Lincoln Concierge and Ford customer service have informed owners that affected VINs are either not under recall or not eligible for warranty coverage. Extended warranty programs (if in effect at time of failure) covered long-block replacement; out-of-warranty repairs are the owner's responsibility. No proactive owner notification or inspection program reported.
Repeated Misdiagnosis Leading to Delayed Repair
Owners report that dealerships initially attributed symptoms to spark plugs or ignition coils, replacing those components multiple times before diagnosing coolant intrusion as the root cause. This delays identification of the real defect and adds unnecessary repair costs.
When: Varies; occurs on first or subsequent visits; delays of weeks to months reported
Symptoms owners cite: Check engine light with misfire codes; Rough idle; Engine hesitation
Codes mentioned: P0300, P0301, P0302, P0303, P0304
Repairs/costs cited: Spark plugs and ignition coils replaced one or more times ($hundreds) before coolant intrusion diagnosis. One owner reported three separate spark plug and coil replacements over weeks before coolant intrusion was identified. Owners state dealerships did not perform cooling system pressurization or borescope tests until after multiple component replacements.
Recalls/TSBs owners mention: Technical Service Bulletin 19-2346 was distributed to dealerships in 2019; owners state dealerships did not reference or use this bulletin during routine service visits to diagnose or prevent the issue.
Parts Unavailability for Recall Repair (NHTSA Campaign 23V378000)
Owners received recall notifications for engine-related issues but could not have repairs completed due to unavailable replacement parts. Dealers confirmed parts were on backorder with no estimated availability date.
When: Campaign notification received May 2023 onward; parts still unavailable as of reports through 2025
Symptoms owners cite: Vehicle under recall but unable to be repaired; Uncertainty and anxiety regarding driving safety
Repairs/costs cited: No repair completed. Owners report waiting months without resolution.
Recalls/TSBs owners mention: NHTSA Campaign 23V378000 opened but parts distribution failed. Lincoln/Ford stated parts were on backorder and eventually shipped parts to dealers, but delays exceeded reasonable timeframes. Owners reported contacted dealerships and Lincoln multiple times with no resolution timeline provided.
Synthesized from 41 NHTSA owner complaints — unverified consumer allegations, summarized for patterns. The verbatim filings appear below.
What owners are reporting 9 most recent
The contact owns a 2018 Lincoln MKC. The contact stated that an unknown warning light was illuminated. The vehicle was taken to an unknown dealer, where it was diagnosed that there was a misfire coming from ignition coil #3. The dealer replaced the ignition coils; however, the failure recurred several times. The vehicle was taken to the dealer, where the diagnostic trouble codes were cleared.…
Engine light came on and my LinolnWAy app told me to not drive over 45 mph because my car may start having smoke come out. I took the car to the dealership and was told that I needed a new engine because the coolant has leaked over . I was told that my car was the 5th Lincoln that came in and needed a new engine. A new engine was installed and I was told that i had just made the warranty…
Coolant intrusion in engine
My car was recalled by Lincoln in May 2023 because a battery sensor causes the car to catch on fire anytime, on or off. I have had my car in to Lincoln 2 times since then and there are no parts to fix the recall. Lincoln says the sensors are on back order and they don't know when they will be available, no end date. My car can combust at anytime and Lincoln has no idea when they will have the…
The contact owns a 2018 Lincoln MKC. The contact stated that the vehicle was experiencing excessive coolant consumption. Additionally, the contact noticed that there was an abnormal coolant odor inside the cabin of the vehicle while driving. The vehicle was taken to an independent mechanic, where it was diagnosed with coolant leaking onto the ignition coil #2. The mechanic replaced the spark…
Car had engine light come on, was told from dealer need completely new engine despite only 70k miles. Is a known issue, please protect US consumers.
2018 Lincoln MXC -2.0L- 47,000 mile Need engine long block replacement Coolant leaking into cylinders
The contact owns a 2018 Lincoln MKC. The contact received notification of NHTSA Campaign Number: 23V378000 (Engine) however, the part to do the recall repair was not yet available. The local dealer was contacted. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. The manufacturer was not made aware of the issue. The contact had not experienced…
Had engine trouble with your 2018 Lincoln MKC?
File a complaint with NHTSA → It's free, official, and how every report above got here — owner filings are the federal safety record this page is built on.
Common questions
How serious is the engine problem on the 2018 Lincoln MKC?
It's a documented issue but not catastrophic. 41 complaints have been filed. Repairs average $3,100 and most owners catch it before it causes a breakdown.
At what mileage does the engine typically fail?
Across the 9 complaints that reported odometer mileage, most engine failures cluster between 50,000 and 80,000 miles, with the median around 60,000. A quarter of owners report trouble before 50,000; a quarter make it past 80,000. Maintenance history matters more than the odometer alone — this is the reported failure window, not a guarantee.
What does it cost to fix?
Independent shops typically charge around $3,100 for engine repairs on this vehicle. Dealer pricing tends to run 20-40% higher. The exact figure depends on the specific failure mode, parts availability, and your local labor rates. If you're outside factory warranty, an extended service contract often covers this category.
Are there any recalls related to engine?
No active recalls currently cover engine issues on this vehicle. The complaints filed represent owner-reported failures that haven't risen to the level of a manufacturer-issued recall — but they're still worth knowing about before you buy or budget for repairs.
Related
Complaint and recall data sourced from the National Highway Traffic Safety Administration (NHTSA)
public records database. Verify the raw federal record at
nhtsa.gov/vehicle/2018/Lincoln/MKC.
Severity ratings are derived from reported crashes, fires, injuries, and fatalities. Repair cost estimates are
independent-shop national averages and may differ in your area. Some links on this page are affiliate links.