Lincoln MKZ 2

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.

• !! Coolant Intrusion into Cylinders (EcoBoost Defect) from 100,000 km

  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.
  5,000–10,000 $
  Ad Short Block 2.0 EcoBoost MKZ ReplacementLong Block Ford 2.0L EcoBoost replacementTSB 19-2172 Ford EcoBoost Coolant
• !! Coolant Loss from Engine Block Hairline Crack from 80,000 km

  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.
  3,000–8,000 $
  Ad Engine Block Crack 2.0 EcoBoost NautilusCoolant Loss Ford 2.0L EcoBoost Block Crack
• !! 6F35 Transmission: Torque Converter Shudder from 80,000 km

  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.
  200–2,800 $
  Ad Torque Converter 6F35 Lincoln MKZSchaeffler LuK TC0010 6F356F35 Transmission Fluid Flush MKZ

+ 4 more engine weaknesses + vehicle weaknesses

The 3.0L TT V6 in the Aviator is a more heavily cooled variant of the Cyclone block with reinforced main bearings. Pre-May 2020 builds had a 10R60 A-clutch snap ring issue — resolved by summer 2020. Recall 24S55 for brittle Silchrome intake valves covers June–October 2021 build dates. The PHEV Grand Touring pairs the V6 with a 47-kWh battery pack and a rear electric axle.

• !! Recall 24S55: Brittle Intake Valves (Silchrome Lite)

  Over-hardened Silchrome Lite intake valves can fracture and cause catastrophic engine failure. Affects Aviator 2021–2022 built June–October 2021. Ford recall 24S55 — engine replacement at no cost.

  Symptoms: Engine misfires, power loss, loud knocking, possible complete engine failure.
  0–0 $
  Ad Ford Recall 24S55 Intake ValveIntake Valve Silchrome 3.0L EcoBoost Aviator Recall
• !! Recall 21S34: AC Compressor Wire Harness Fire Risk

  The AC compressor pulley can cut through wire harness insulation and cause a vehicle fire. Affects ~41,000 Aviators (2020–2021, 3.0L gas). Free repair at dealer.

  Symptoms: Burning smell from engine bay, warning lights, visible scorching on wire harness.
  0–0 $
  Ad Ford Recall 21S34 Wire HarnessLincoln Aviator Wire Harness Fire Recall
• !! Cam Phaser Noise at Cold Start from 80,000 km

  The 3.0L EcoBoost in the Aviator can develop cam phaser rattle at cold startup. Less severe than in the 3.5L Navigator, but worth monitoring.

  Symptoms: Brief rattling immediately after a cold start, disappears once oil reaches operating temperature.
  600–2,000 $
  Ad Cam Phaser 3.0 EcoBoost AviatorVariable Cam Timing Actuator Ford 3.0L V6

+ 2 more engine weaknesses + vehicle weaknesses

The 3.7L naturally aspirated V6 in the MKZ II is the more straightforward choice — no turbo complexity, solid long-term durability. The main weakness is the internally mounted chain-driven water pump: failure requires extensive disassembly. Post-2012 redesigned cam phaser sprockets made this engine significantly more reliable. Regular oil and coolant checks are essential.

• !! Chain-Driven Water Pump Failure (Internal) from 110,000 km

  The 3.7L V6 water pump sits in the engine valley and is driven by the timing chain. Failure requires extensive disassembly. Coolant-oil contamination is possible when seals fail.

  Symptoms: Rising coolant temperature, coolant level drop, milky oil, squealing from engine bay.
  1,200–3,500 $
  Ad Water Pump Ford 3.7L V6 MKZ internalDuratec-37 Water Pump Replacement
• !! Cam Phaser Rattle on Cold Start from 100,000 km

  Variable cam timing phasers on the 3.7L V6 can rattle on cold start until oil pressure builds. Post-2012 redesigned sprockets are significantly better; earlier units more prone.

  Symptoms: Brief cold-start rattle disappearing within seconds, occasional P0011/P0021 codes.
  800–2,500 $
  Ad Cam Phaser Ford 3.7L V6 MKZVCT Phaser Duratec 37 Replacement

The 2.5L Atkinson-cycle engine in the Corsair Grand Touring is a naturally aspirated hybrid motor without a turbocharger — it runs the Atkinson cycle for efficiency and relies on electric assist for performance. No belt drive (chain cam). The LG Energy Solution high-voltage battery pack was subject to a fire recall due to folded anode tabs; replacement packs are now in the field. Regenerative braking can feel unusual in cold weather.

• !! Recall: High-Voltage Battery Fire Risk (LG Cells)

  LG Energy Solution lithium-ion cells can short-circuit and catch fire. Ford advised owners not to charge. Replacement packs available. Affects 2021–2024 Corsair Grand Touring PHEV.

  Symptoms: No driver warning — fire risk occurs during or after charging.
  0–0 $
  Ad Lincoln Corsair PHEV Battery RecallLG Battery Fire Corsair Grand Touring HV Pack
• !! Recall 20B51: Hard Brake Pedal / Unintended Braking

  A cracked solenoid coil in the electric brake booster unit (EBB) can cause loss of brake assist or unintended hard braking. Entire EBB unit replacement required.

  Symptoms: Sudden rock-hard brake pedal, unexpected strong deceleration, warning lights illuminate.
  0–0 $
  Ad EBB Corsair PHEV Recall 20B51Electric Brake Booster Lincoln Corsair 2020
• !! Vehicle Shutdown from PHEV Deep-Sleep Mode from 20,000 km

  The PHEV control module can send the entire vehicle into a non-recoverable deep sleep while driving. The 12V battery fully drains as a result. RACM software update resolves the issue.

  Symptoms: All vehicle systems cut off mid-drive, vehicle cannot be restarted without jump start.
  0–500 $
  Ad Lincoln Corsair PHEV Control modulee ShutdownRACM Software Update Corsair PHEV Battery Drain

+ 1 more engine weaknesses + vehicle weaknesses