The 2015 Chrysler 300 is a full-size sedan built on the LX/LD platform with proven powertrains, but it suffers from chronic transmission issues, premature Hemi engine failures on certain builds, and electrical gremlins that can frustrate owners well before 100,000 miles.
ZF 8-Speed Transmission Shudder and Failure
Common · high severityTypical onset: 60,000-120,000 mi
Symptoms: Harsh or delayed shifts, especially 2-3 and 3-4, Shuddering or vibration during light acceleration between 25-45 mph, Transmission going into limp mode, check engine light with TCM codes, Metallic debris in fluid during service, indicating internal clutch pack wear
Fix: Early cases may respond to adaptive reset and fluid flush (2 hours), but most need internal overhaul or replacement. Transmission R&R is 8-10 hours, rebuild adds another 12-16 hours. Cooler lines and cooler itself often replaced simultaneously due to contamination. TCM update sometimes required.
Estimated cost: $3,500-6,500
5.7L Hemi Camshaft and Lifter Failure
Occasional · high severityTypical onset: 70,000-130,000 mi
Symptoms: Ticking or tapping noise from valve train, especially cold start, MDS (cylinder deactivation) misfires or rough idle, Check engine light with multiple misfire codes, Metal shavings in oil, loss of oil pressure in severe cases
Fix: Requires camshaft replacement with updated lifters and rocker arms. Engine disassembly is substantial: intake manifold, valve covers, cylinder heads often need to come off. 16-20 hours labor. Oil system flush mandatory. Some engines show premature cam lobe wear due to inadequate oiling during MDS cycling.
Estimated cost: $4,000-7,000
Transmission Oil Cooler Line Leaks
Common · medium severityTypical onset: 50,000-90,000 mi
Symptoms: Transmission fluid spots under vehicle, typically passenger side near radiator, Low transmission fluid warnings or slipping when fluid gets critically low, Visible corrosion or wetness on cooler hard lines or rubber hoses at crimp points
Fix: Rubber hose sections dry-rot and crack, hard lines corrode at bends. Replace full cooler line assembly, not just sections. 2-3 hours labor including fluid refill and system purge. Often discovered during routine service before catastrophic failure.
Estimated cost: $400-800
Front Suspension Strut Mount and Bearing Failure
Common · low severityTypical onset: 60,000-100,000 mi
Symptoms: Clunking or knocking over bumps, especially when turning, Steering feels notchy or catches when turning from stop, Visible rust staining or separation at strut tower, Uneven tire wear on front edges
Fix: Upper strut mounts and bearings wear prematurely due to weight and northern salt exposure. Replace mounts in pairs with struts if struts are original (recommended at this mileage). 3-4 hours labor for mounts only, 4-5 hours with struts. Alignment required afterward.
Estimated cost: $600-1,200
Uconnect Touchscreen and Radio Failure
Occasional · low severitySymptoms: Screen freezes, won't respond to touch input, Radio reboots randomly while driving, Backup camera intermittent or black screen, Total loss of audio system, HVAC controls unresponsive on touchscreen models
Fix: Early 2015 models have software bugs and failing capacitors in radio head unit. TSB updates available but don't always solve it. Replacement radio unit required in most cases. 1.5-2 hours labor for R&R and coding. Used units from salvage often fail similarly, remanufactured units more reliable.
Estimated cost: $800-1,500
Water Pump Failure (3.6L Pentastar)
Occasional · high severityTypical onset: 80,000-120,000 mi
Symptoms: Coolant leak from front of engine, passenger side low, Whining or grinding noise from accessory drive area, Overheating, temperature gauge climbing above normal, Visible coolant weepage at water pump weep hole
Fix: Pentastar water pump is internally mounted, driven by timing chain. Requires timing cover removal, special tools. 6-8 hours labor. Replace thermostat and hoses at same time. Coolant contamination can damage pump bearing. Not a quick roadside fix—tow required if it fails.
Estimated cost: $1,200-1,800
A comfortable highway cruiser with strong V8 options, but transmission and Hemi durability concerns make it a risky buy over 80,000 miles unless maintenance records prove religious fluid service.
AI-assisted summary drawn from NHTSA recall data, our labor-times database, and platform knowledge. Not a substitute for a pre-purchase inspection on a specific vehicle.