Lincoln MKZ
The 2.0L EcoBoost I4 in the Nautilus CD539 is derived from the Edge-era EcoBoost-2.0 block with minor output adjustments. The 8F35 transmission shows shift shudder that TSB 25-2154 fixes via PCM reflash in most cases. Coolant loss from hairline block cracks was seen in the MKX predecessor — rare in the CD539 but worth monitoring. Direct injection: check intake valves around 80,000 km.
Gets the job done, no excitement
The 2.0T in the MKZ II does its job solidly — 240 hp is perfectly adequate for this segment. No driver-focused intent, but acceleration is adequate. No sporting ambitions, but comfort and efficiency are real.
Engine Weaknesses 7
Cracks at the block-head interface allow coolant to leak into cylinders 2 or 3. Primarily affects 2016–2019 MKZ with 2.0L EcoBoost. Class action filed against Ford. Short block replacement is often the only lasting fix.
Symptoms: Cylinder 2 or 3 misfire (P0302/P0303), white exhaust smoke, coolant level dropping without external leak, milky oil.
The 2.0L EcoBoost block can develop hairline cracks causing internal or external coolant loss. A known issue in the MKX predecessor; rare in the CD539 but worth monitoring.
Symptoms: Coolant level drops with no external leak, white smoke from exhaust, rising temperature gauge.
The 6F35 torque converter develops shudder during lock-up at high mileage. The 2017 MKZ 2.0L has recall 17S16 for improperly welded converter studs that can cause sudden loss of drive.
Symptoms: Shudder or vibration between 40–65 mph, jerky shifts, hesitation pulling away from a stop.
The 6F35 in the MKC develops torque converter shudder and shift hesitation at high mileage. Fixes range from fluid change to full replacement.
Symptoms: Shudder 40–65 mph, jerky shifts, hesitation pulling away.
The 8F35 automatic in the Nautilus shows the most complaints in the 2019 model year (46 total complaints reported). TSB 25-2154 PCM reflash solves most cases; severe cases need torque converter or transmission replacement.
Symptoms: Noticeable lurch when upshifting through gears 1–3, clunk on downshift.
Direct injection without port spray allows carbon deposits to accumulate on intake valve faces. Walnut blasting every 80,000 km recommended.
Symptoms: Hard cold start, occasional hesitation at low rpm.
Direct injection without port spray promotes carbon deposits on the intake valve faces. Regular cleaning extends smooth operation.
Symptoms: Stumble on cold starts, hesitation at partial throttle.
Vehicle Weaknesses 8
2017 MKZ with 2.0L / 6F35: converter studs may be inadequately welded and detach, causing sudden complete loss of drive. Ford replaces converter free of charge. NHTSA campaign 17V427000.
In hot-climate states, the pawl spring tab in door latches can fracture. Doors may not latch securely and could open while driving. Affects 2014–2016 MKZ. Ford replaces all four door latches at no charge.
The 6F35 six-speed in the MKZ II develops torque converter shudder in lock-up mode at high mileage. Fluid changes every 60,000 km are recommended as a preventative measure.
The APIM module behind the touchscreen in 2013–2016 MKZ can crash, leaving the screen black or frozen. Ford ran Customer Satisfaction Program 12M02 with a 5-year warranty extension on affected APIMmodules.
Aluminum body panels (particularly the hood) can develop corrosion bubbles beneath the clear coat, accompanied by white powder dust. A recognized Ford/Lincoln issue with a TSB. Panel replacement often needed.
Soft-touch surfaces on door panels and dashboard in 2013–2016 MKZ peel and delaminate over time. Faux leather trim also separates from substrates. A typical luxury material aging issue.
Early 2013–2015 MKZ models showed unusually rapid tire wear, often tied to suspension alignment issues. Documented at around 40,000 km on multiple units.
The integrated LEDs in the MKZ II door handles — the model's signature visual feature — can fail prematurely. The entire door handle assembly must be replaced, not just the LED.
