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2010 CHRYSLER 300

2.7L V6•RWD•AUTOMATIC•gas
5-Year Cost of Ownership
$16,106 maintenance + known platform issues
~$3,221/yr · 270¢/mile equivalent · $5,159 maintenance + $10,247 expected platform issues
Compare this engine
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3.6L V6
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5.7L V8 HEMI
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3.6L V6 Pentastar
Common Problems & Known Issues

The 2010 Chrysler 300 is a comfortable highway cruiser with solid bones, but the 2.7L V6 is a notorious oil-sludge engine that self-destructs, and the early NAG1 five-speed transmission has chronic cooling and solenoid issues that lead to expensive failures.

2.7L V6 Oil Sludge and Catastrophic Engine Failure

Common · high severity
Typical onset: 80,000-130,000 mi
Symptoms: knocking or ticking from engine, oil light flickers at idle, excessive oil consumption (quart every 500-1000 mi), overheating without coolant loss, seized engine
Fix: The 2.7L has inadequate oil passages and runs hot, building sludge that starves bearings and cams. Once symptoms appear, damage is usually done. Repair requires either complete engine rebuild (25-35 hours) or used/reman long block replacement (18-22 hours). Many owners discover this after catastrophic failure.
Estimated cost: $4,500-7,500

Transmission Oil Cooler Line Failure and Cooler Clogging

Common · high severity
Typical onset: 60,000-110,000 mi
Symptoms: transmission slipping or flaring shifts, pink fluid in coolant reservoir or milky transmission fluid, transmission overheating warning, no reverse or delayed engagement
Fix: The external cooler lines corrode and leak, or the internal radiator cooler fails, cross-contaminating coolant and ATF. This kills the transmission quickly. Proper fix requires new cooler assembly, lines, radiator flush, and often transmission rebuild because contamination damages clutch packs and valve body (12-18 hours total if trans needs rebuild).
Estimated cost: $2,800-5,200

NAG1 Transmission Output Shaft Bearing and Solenoid Pack Failure

Common · high severity
Typical onset: 90,000-140,000 mi
Symptoms: whining or grinding noise in all gears, harsh or delayed shifts, limp mode with P0700/P0715 codes, intermittent loss of gears, metal shavings in fluid
Fix: The output shaft bearing wears prematurely, contaminating fluid and damaging the solenoid pack and valve body. Requires transmission removal, bearing replacement, and often new solenoid pack and valve body cleaning/replacement (14-18 hours). If caught late, full rebuild needed.
Estimated cost: $2,200-4,800

Electronic Throttle Control (ETC) and Ignition TIPM Failures

Occasional · high severity
Symptoms: red lightning bolt warning on dash, sudden loss of throttle response, engine stalls at stops, fuel pump cycles randomly, no-start with accessories working, intermittent electrical gremlins
Fix: The Totally Integrated Power Module (TIPM) develops corroded circuits or failed relays, killing fuel pump, ignition, or throttle control. Chrysler had a recall extension but many units still fail. Requires TIPM replacement and reprogramming (2.5-3.5 hours). ETC issues may also be throttle body carbon buildup or pedal sensor—diagnose first.
Estimated cost: $800-1,400

Front Suspension Lower Control Arm Bushings and Ball Joints

Common · medium severity
Typical onset: 70,000-100,000 mi
Symptoms: clunking over bumps, wandering steering or loose feel, uneven tire wear on inside edges, steering wheel off-center after alignment
Fix: The LX platform eats front lower control arm bushings and ball joints, especially with larger wheels or spirited driving. Both control arms typically need replacement together. Labor is straightforward but alignment is mandatory (3-4 hours per side including alignment).
Estimated cost: $600-1,100

Evaporative Emissions System Leaks and Purge Valve Failure

Occasional · low severity
Typical onset: 80,000-120,000 mi
Symptoms: check engine light with P0455/P0456 codes, fuel smell near rear of car, hissing when removing gas cap, rough idle when cold
Fix: EVAP system develops leaks at canister, vent valve, or purge valve. Most common is purge valve sticking open causing rough idle and fuel smell. Smoke test required to pinpoint leaks. Purge valve replacement is easy (0.5 hours), canister or lines more involved (2-3 hours).
Estimated cost: $200-650

Water Pump and Thermostat Housing Leaks (3.5L V6)

Occasional · medium severity
Typical onset: 90,000-130,000 mi
Symptoms: coolant puddles under front of engine, overheating in traffic, coolant smell from vents, visible coolant weeping from timing cover area
Fix: The 3.5L develops leaks at water pump gasket and plastic thermostat housing. Water pump requires timing belt area access (4-5 hours). Smart move is replacing timing belt, water pump, and thermostat together if near 100k miles since labor overlaps heavily.
Estimated cost: $800-1,400
Owner tips
  • If buying a 2.7L V6 model, walk away unless you have full service records proving religious 3,000-mile oil changes with quality synthetic—even then it's a gamble.
  • Change transmission fluid every 50,000 miles with Mopar ATF+4 only; aftermarket fluid kills these transmissions faster.
  • Inspect transmission cooler lines for corrosion annually and watch for any pink coolant or milky ATF—catch cross-contamination early to save the transmission.
  • The 5.7L HEMI and 3.5L V6 are far more durable than the 2.7L; prioritize these engines when shopping used.
  • Budget for front suspension refresh around 80k miles—it's maintenance on this platform, not a defect.
Buy a 3.5L V6 or 5.7L HEMI model with documented transmission services under 100k miles; avoid any 2.7L V6 unless you enjoy expensive surprises.
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.
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