2024 CHRYSLER 300

Typical onset: 60,000-120,000 mi

Symptoms: Cold-start ticking or tapping that may disappear when warm, Check engine light with misfire codes (P0300 series), Loss of power, rough idle, Metal shavings in oil during changes

Fix: Roller lifters in the MDS (Multi-Displacement System) fail, wiping cam lobes. Requires both cylinder heads off, new lifters, camshaft, often pushrods and rockers. 16-20 hours labor. Some shops do full long-block swaps if bearing damage is suspected. Mopar updated lifters exist but failures still occur.

Estimated cost: $4,500-8,000

Typical onset: 40,000-100,000 mi

Symptoms: Low oil warning light between changes, Blue smoke on startup or acceleration, Fouled spark plugs, Burning 1+ quart per 1,000 miles

Fix: Piston ring design allows oil past rings into combustion chamber. FCA issued TSB but no recall. Real fix is engine rebuild or short-block replacement: pistons, rings, hone cylinders, new bearings. 24-30 hours labor if done right. Some owners band-aid it by checking oil religiously, but risk is spun bearing or lifter failure from low oil.

Estimated cost: $6,000-10,000

Typical onset: 50,000-90,000 mi

Symptoms: Vibration or shudder during light acceleration at 25-45 mph, Delayed or harsh shifts, especially 2-3 and 3-4, Transmission overheat warnings, Whining or growling from trans

Fix: ZF 8HP torque converter clutch shudder is common. Flush with Mopar ZF-spec fluid sometimes helps short-term. Real fix often requires new torque converter, sometimes valve body or full rebuild. Trans oil cooler lines crack at crimp points, causing low fluid and overheating. 8-12 hours for torque converter, 18-24 for full rebuild.

Estimated cost: $2,800-5,500

Typical onset: 70,000-130,000 mi

Symptoms: Transmission fluid puddle under engine bay, passenger side, Low transmission fluid warnings, Burnt transmission smell, Fluid visible on oil cooler housing or lines

Fix: Crimped cooler lines corrode or crack at fittings where they connect to radiator-mounted cooler. Requires replacement of lines and sometimes external cooler itself. 2-4 hours labor depending on access. Mopar revised lines with better crimps, use those.

Estimated cost: $500-1,200

Typical onset: 80,000-120,000 mi

Symptoms: Coolant leak from front of engine, low on block, Squealing or grinding from serpentine belt area, Engine overheating or temp gauge climbing, Coolant in oil (severe cases)

Fix: Pentastar water pump is internally mounted, driven by timing chain. When it fails, coolant leaks into timing cover or externally. Requires timing cover removal, new pump, timing chain inspection. 6-8 hours labor. Do thermostat and hoses at same time.

Estimated cost: $1,200-2,000

Typical onset: 60,000-100,000 mi

Symptoms: Clunking over bumps from front end, Steering wander or loose feel at highway speeds, Inner tire wear, Vibration in steering wheel

Fix: Rear bushings on lower control arms split and tear, especially in rust-belt states. Arms come as assembly, bushings not sold separately by Mopar. Aftermarket bushings available but most shops replace full arms. 2-3 hours per side, alignment required after.

Estimated cost: $600-1,200