2012 CHRYSLER 300

Typical onset: 80,000-130,000 mi

Symptoms: harsh or delayed shifting, especially 2-3 or 3-4, limp mode with P0755 or P0731 codes, transmission slipping under moderate acceleration, grinding or clunking on downshifts

Fix: Requires transmission pan removal, valve body solenoid replacement (often the entire mechatronic unit), fluid flush, and TCM software update. 4-6 labor hours if solenoids only; 8-12 hours if valve body replacement needed. Some require complete transmission R&R for internal clutch pack damage.

Estimated cost: $1,800-4,500

Typical onset: 70,000-120,000 mi

Symptoms: ticking or tapping noise from engine at idle, worse when warm, misfire codes on cylinders 1, 4, 6, or 7, Check Engine Light with P0300-series codes, loss of power under load

Fix: Failed MDS lifters require cylinder head removal on the affected bank, lifter replacement, camshaft inspection (often worn lobes), and valve train reassembly. 12-16 labor hours per bank. Many techs replace all 16 lifters preventively. Oil consumption issues often accompany this.

Estimated cost: $3,500-6,500

Typical onset: 60,000-100,000 mi

Symptoms: pink or red fluid puddles under front of car, low transmission fluid warnings, burnt transmission smell, transmission slipping or overheating after highway driving

Fix: Rubber lines at the radiator end-tank harden and crack. Replace both cooler lines, top off fluid, and inspect radiator for cross-contamination (coolant in trans fluid is catastrophic). 2-3 labor hours. If coolant mixed into trans, full flush and often transmission replacement needed.

Estimated cost: $400-800

Typical onset: 70,000-110,000 mi

Symptoms: battery light on dash, voltage gauge showing 11V or 17V+ (should be 13.5-14.5V), dimming headlights or electrical glitches, no-start after sitting overnight

Fix: Alternator replacement. Serpentine belt removal, three bolts, electrical connector. 1.5-2 labor hours. NHTSA recalls covered some units, but many fall outside recall criteria. Use OEM or quality reman—cheap parts fail in 6 months.

Estimated cost: $450-750

Typical onset: 80,000-140,000 mi

Symptoms: clunk when shifting into Drive or Reverse, vibration at idle in gear, driveline shudder on hard acceleration, visible sag of transmission tailhousing

Fix: Rubber mount deteriorates, allowing excessive drivetrain movement. Lift vehicle, support transmission, remove two bolts, replace mount. 1-1.5 labor hours. Inspect driveshaft and u-joints while in there.

Estimated cost: $250-400

Typical onset: 90,000-130,000 mi

Symptoms: coolant leak from front-center of engine, whining or grinding noise from accessory drive, overheating under load, coolant puddle after overnight sit

Fix: Water pump is internally mounted, driven by timing chain. Requires front cover removal, timing chain R&R, water pump replacement, coolant flush. 6-8 labor hours. Replace thermostat and hoses while apart.

Estimated cost: $1,200-1,800

Typical onset: 100,000-150,000 mi

Symptoms: hard starting after sitting, stumble or hesitation on acceleration, stalling at idle or low speed, fuel smell from tank area

Fix: In-tank fuel pump module with integral filter clogs or pump motor fails. Drop fuel tank, replace pump module assembly. 3-4 labor hours. Recommend fuel system cleaning and new fuel cap if EVAP codes present.

Estimated cost: $650-1,100