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2005 CHRYSLER 300

5.7L V8 HEMI•RWD•AUTOMATIC•gas
5-Year Cost of Ownership
$24,096 maintenance + known platform issues
~$4,819/yr · 400¢/mile equivalent · $18,249 maintenance + $5,147 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 LX-platform 300 was Chrysler's rear-drive renaissance, but the 2.7L V6 is a ticking time bomb and the early NAG1 5-speed autos have cooler line and mount issues. The 5.7L HEMI and 3.5L V6 are far more durable, but trans problems don't discriminate by engine.

2.7L V6 Catastrophic Engine Failure (Sludge and Oil Starvation)

Common · high severity
Typical onset: 60,000-120,000 mi
Symptoms: Ticking or knocking from engine, especially cold start, Low oil pressure warning light, Sudden loss of power, then complete seizure, Metal shavings in oil on drain
Fix: The 2.7L uses a water-jacketed timing chain that traps sludge, starving bearings and cam journals. Once knocking starts, it's terminal. Requires long block replacement or engine swap. 12-16 hours labor for R&R, plus machine work if rebuilding.
Estimated cost: $3,500-6,500

Transmission Oil Cooler Line Failure and External Leaks

Common · high severity
Typical onset: 80,000-140,000 mi
Symptoms: ATF pooling under vehicle near radiator, Transmission slipping or delayed engagement after leak begins, Low fluid level on dipstick, Pink fluid mixing with coolant if internal cooler fails
Fix: The steel cooler lines rust through at flare fittings and frame contact points. If the internal radiator cooler fails, ATF contaminates coolant and requires trans flush, radiator replacement, and often trans rebuild. External line replacement is 2-3 hours; internal failure adds 8-12 hours for trans service.
Estimated cost: $400-800 for lines alone; $2,500-4,000 if radiator cooler contaminates trans

Transmission Mount Failure (Rear Mount)

Common · medium severity
Typical onset: 70,000-120,000 mi
Symptoms: Clunk or bang on hard acceleration or deceleration, Vibration at idle in Drive, Visible sag or torn rubber on rear trans mount, Exhaust rattle if trans drops too far
Fix: The rear transmission mount deteriorates from heat and age, allowing excessive drivetrain movement. Common on all engines. Replacement requires lifting trans slightly. 1.5-2 hours labor.
Estimated cost: $250-450

Evaporative Emissions Leak (EVAP System)

Common · low severity
Typical onset: 50,000-100,000 mi
Symptoms: Check Engine Light with P0455 or P0456 code (large or small EVAP leak), Fuel smell near rear of vehicle, Hissing sound when removing fuel cap
Fix: Cracked EVAP canister, split hoses, or leaking purge valve are common. Requires smoke test to locate. Canister replacement is 1-1.5 hours; purge valve is 0.5 hour; hoses vary by location.
Estimated cost: $200-600 depending on component

Water Pump Failure (3.5L V6 and 5.7L HEMI)

Occasional · high severity
Typical onset: 80,000-120,000 mi
Symptoms: Coolant leak from front of engine, Squealing or grinding noise from accessory belt area, Overheating, especially at idle, Visible coolant seepage at weep hole
Fix: Bearings fail or seals leak. On the HEMI, water pump is behind the timing cover, requiring timing chain access. 3.5L is external. HEMI: 6-8 hours; 3.5L: 2-3 hours.
Estimated cost: $400-700 for 3.5L; $900-1,400 for HEMI

Front Lower Control Arm Bushings and Ball Joints

Common · medium severity
Typical onset: 60,000-100,000 mi
Symptoms: Clunking over bumps, Wandering or vague steering, Uneven tire wear on inside edges, Visible play in ball joint or torn bushings on inspection
Fix: The LX platform eats front suspension bushings, especially in rust-belt states. Most shops replace entire control arms rather than pressing bushings. Both sides typically done together. 3-4 hours labor.
Estimated cost: $600-1,000 both sides

Ignition Coil and Spark Plug Failure (All Engines)

Occasional · medium severity
Typical onset: 40,000-80,000 mi
Symptoms: Misfire codes (P0300-P0308), Rough idle and hesitation, Reduced fuel economy, Check Engine Light flashing under load
Fix: Coil-on-plug design. Coils fail from heat cycling; plugs foul or gap widens. Replace misfiring coil and all plugs as a set. V6: 1-1.5 hours; HEMI: 2-3 hours due to intake plenum removal.
Estimated cost: $350-600 for full service

Rear Differential Pinion Seal Leak

Occasional · low severity
Typical onset: 80,000-130,000 mi
Symptoms: Gear oil drip at front of rear differential, Low fluid level causing whine or howl on decel, Visible seepage on driveshaft yoke
Fix: Pinion seal hardens and leaks. Requires driveshaft removal and seal replacement. Should also inspect pinion bearings for preload. 2-3 hours labor.
Estimated cost: $300-500
Owner tips
  • Avoid 2.7L V6 models entirely unless full service history proves religious 3,000-mile oil changes with synthetic.
  • Change transmission fluid every 50,000 miles despite 'lifetime fill' claim — will double trans life.
  • Inspect trans cooler lines annually for rust; a $50 line replacement beats a $3,000 trans rebuild.
  • Flush coolant every 3 years to prevent water pump and radiator corrosion.
  • Budget for front suspension refresh at 80,000 miles — it's when, not if.
The 5.7L HEMI or 3.5L V6 with documented trans maintenance is a solid used buy; the 2.7L is a gamble you'll lose.
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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