2013 LINCOLN MKZ

Typical onset: 60,000-120,000 mi

Symptoms: White smoke from exhaust, especially on cold start, Coolant loss with no visible leaks, Rough idle or misfires, especially cylinder 3 and 4, Milky oil or coolant in oil pan, Hydrolock leading to bent connecting rods

Fix: Root cause is a cracked cylinder head allowing coolant into cylinders, destroying pistons and bearings. Requires complete engine rebuild (pistons, rings, bearings, head gaskets, decking heads) or short-block replacement. 18-24 labor hours for rebuild, 14-18 hours for short-block swap.

Estimated cost: $5,500-9,000

Typical onset: 70,000-110,000 mi

Symptoms: Transmission slipping or delayed engagement, Milky or pink transmission fluid, Coolant mixing with ATF in radiator or cooler, Overheating transmission temperatures

Fix: The internal transmission cooler in the radiator fails, allowing coolant and ATF to cross-contaminate. Requires new radiator, complete transmission flush (often multiple flushes), cooler lines, and sometimes full transmission rebuild if contamination circulated long. Flush and cooler: 4-6 hours; if trans rebuild needed, add 12-16 hours.

Estimated cost: $1,200-2,500 (cooler/flush) or $3,500-5,500 (with trans rebuild)

Symptoms: Doors will not latch closed or pop open while driving, Door ajar warning with door fully closed, Inability to open door from inside or outside, Pawl spring or latch mechanism breaking

Fix: Factory door latches fail due to defective pawl springs—covered under multiple recalls (14S22, 15S16, 16S30) but often owners experience issues outside recall windows or on non-covered doors. Replacement latch per door: 1.5-2.5 hours labor each.

Estimated cost: $250-450 per door (if not recall-covered)

Typical onset: 50,000-90,000 mi

Symptoms: Complete loss of power steering assist while driving, "Steering Assist Fault" warning on dash, Stiff, heavy steering requiring extreme effort, Intermittent assist loss, especially in cold weather

Fix: EPAS module or steering gear motor fails—subject to recall 14S07 and 15S21 for some VINs. Steering column harness connector corrosion is common culprit. Diagnosis: 1 hour; EPAS module replacement: 2-3 hours; full steering gear: 4-6 hours.

Estimated cost: $800-1,500 (module) or $1,800-3,200 (full gear)

Typical onset: 60,000-100,000 mi

Symptoms: Clunking during hard acceleration or deceleration, Excessive vibration at idle in Drive, Visible engine/trans movement when revving in Park, Drivetrain shudder during shifts

Fix: Hydraulic transmission mount (often called the "roll restrictor") fails, allowing excessive powertrain movement. Replacement requires engine support and subframe access. 2.5-3.5 hours labor.

Estimated cost: $400-700

Typical onset: 80,000-130,000 mi

Symptoms: Hard starting or extended cranking, Loss of power under load, especially uphill, Rough idle or stumbling acceleration, Check engine light with low fuel pressure codes (P0087, P0191)

Fix: In-tank fuel filter and fuel pump module can clog, especially with contaminated fuel. Requires fuel tank drop and pump/filter assembly replacement. 3-4 hours labor.

Estimated cost: $600-1,100

Symptoms: Water or condensation visible inside headlight lens, LED daytime running lights or turn signals flickering or out, Headlight projector fogging reducing nighttime visibility

Fix: Adaptive HID/LED headlight assemblies develop seal failures allowing moisture intrusion. Driver module in headlight can also fail. Full headlight assembly replacement: 1.5-2 hours per side. Recall 14C04 covered some units.

Estimated cost: $800-1,800 per headlight assembly