The 2008 Chrysler 300 rides on the proven LX platform but suffers from chronic transmission cooler failures, weak 2.7L V6 engine internals, and ignition system headaches. The HEMI V8s are generally solid, but all variants share electrical gremlins and front suspension wear.
Transmission Oil Cooler Internal Failure (NAG1 5-speed auto)
Common · high severityTypical onset: 80,000-140,000 mi
Symptoms: Milky pink transmission fluid, Coolant in transmission pan, Transmission slipping or harsh shifts, Overheating transmission, Engine running rough from coolant contamination
Fix: The cooler is integrated into the radiator and fails internally, cross-contaminating coolant and ATF. Requires new radiator, complete transmission fluid flush (often multiple cycles), external filter, and possibly transmission rebuild if caught late. 6-10 hours labor depending on damage extent.
Estimated cost: $1,200-$4,500
2.7L V6 Engine Sludge and Bearing Failure
Common · high severityTypical onset: 90,000-150,000 mi
Symptoms: Ticking or knocking from engine at startup, Low oil pressure warning, Metal shavings in oil, Seized engine in severe cases, Oil consumption between changes
Fix: The 2.7L has inadequate oiling to the timing chain area and weak main bearings. Sludge buildup accelerates wear. Most need short block replacement or full engine rebuild. Used engine swap is common. 18-24 hours labor for R&R plus machining if rebuilding.
Estimated cost: $3,500-$6,500
TIPM (Totally Integrated Power Module) Failure
Common · medium severitySymptoms: Intermittent no-start, Fuel pump not priming, Gauges dead or erratic, Wipers or accessories operating on their own, Multiple seemingly unrelated electrical issues
Fix: The TIPM controls most electrical functions and develops internal relay failures or corrosion. Chrysler updated designs multiple times. Replacement requires programming. Some shops attempt relay-level repairs but replacement is most reliable. 2-3 hours labor.
Estimated cost: $800-$1,400
Front Lower Control Arm Bushings and Ball Joints
Common · medium severityTypical onset: 60,000-100,000 mi
Symptoms: Clunking over bumps, Wandering steering, Excessive tire wear on inside edges, Vibration during braking, Popping noise when turning
Fix: The front suspension uses pressed-in bushings that deteriorate quickly. Ball joints often fail at same time. Most replace entire control arms rather than pressing bushings. Both sides should be done together. 3-4 hours labor plus alignment.
Estimated cost: $600-$1,000
Ignition Lock Cylinder and WIN (Wireless Ignition Node) Failure
Occasional · high severityTypical onset: 100,000-160,000 mi
Symptoms: Key won't turn in ignition, No-start with correct key, Security light flashing, Intermittent crank/no-start, Key stuck in ignition
Fix: The lock cylinder wears and the WIN module (reads the key chip) fails. Subject to recall but many outside recall VINs. Requires new lock cylinder, WIN module, and reprogramming all keys. Dealer or locksmith with proper tools. 2-3 hours labor.
Estimated cost: $400-$900
Fuel Pump and Fuel Filter Clogging
Occasional · medium severityTypical onset: 80,000-130,000 mi
Symptoms: Hard starting when hot, Stalling during acceleration, Loss of power under load, Whining noise from rear tank area, Check engine light with lean codes
Fix: The in-tank fuel pump strainer clogs and pump motor weakens. Fuel filter (when equipped separately on some models) also clogs. Requires dropping tank for access. 2.5-4 hours labor depending on whether full pump assembly or just strainer is replaced.
Estimated cost: $500-$900
Avoid the 2.7L V6 entirely; a well-maintained HEMI model under 100k miles can be a decent buy if you budget $2k/year for the inevitable TIPM, cooler, and suspension work.
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.