The 2020 Charger rides on the proven LX platform but shows distinct issues by powertrain—V6 models are relatively solid, while Hemi V8s (especially 5.7L and 6.4L) suffer from well-documented lifter/cam failures and the ZF 8HP transmission can develop cooler leaks and mount failures across all trims.
Hemi Lifter and Camshaft Failure (MDS-equipped V8s)
Common · high severityTypical onset: 40,000-90,000 mi
Symptoms: Ticking/tapping noise on cold start that persists, Check engine light with misfire codes (P0300-P0308), Loss of power, rough idle, cylinder deactivation, Metal shavings in oil on analysis
Fix: Requires camshaft replacement, all 16 lifters, and often rocker arms. If caught late, debris damages bearings requiring short block or full engine rebuild. 18-25 labor hours for cam/lifter job, 35+ hours for short block. This is THE Hemi killer on these years.
Estimated cost: $4,500-8,000 for cam/lifters; $8,000-15,000+ for short block
ZF 8HP Transmission Oil Cooler Line Leak
Common · medium severityTypical onset: 50,000-100,000 mi
Symptoms: Transmission fluid dripping near front of vehicle, Low fluid level on dipstick (if equipped) or limp mode, Pink/red fluid pooling after parking, Burning smell if fluid contacts exhaust
Fix: Steel cooler lines crack at crimped fittings or rub-through points. Replace both lines preventatively. 2-3 labor hours, flush and refill required. External leak, rarely causes internal damage if caught early.
Estimated cost: $600-1,200
Transmission Mount Failure (Rear/Crossmember Mount)
Occasional · medium severityTypical onset: 60,000-120,000 mi
Symptoms: Clunk on acceleration or deceleration, especially from stop, Vibration through floor at highway speed, Visible separation or tearing of rubber isolator, Shifter movement/slop when applying throttle
Fix: Rear trans mount takes abuse on V8 models, especially with spirited driving. Inspect all motor and trans mounts simultaneously—they often fail in clusters. 1.5-2 hours labor per mount.
Estimated cost: $300-600 per mount
Fuel Filter Clogging (High-Output V8s)
Occasional · medium severityTypical onset: 80,000-140,000 mi
Symptoms: Rough idle, hesitation under load, Loss of power at wide-open throttle, Long crank times, especially when hot, P0087 or P0088 fuel pressure codes
Fix: In-tank fuel pump module includes filter. Hellcat and Scat Pack cars running E85 blends clog filters faster. Tank drop required. 3-4 hours labor. Not typically a V6 issue.
Estimated cost: $800-1,400
Windshield Stress Cracking (Recall-Adjacent Issue)
Occasional · low severitySymptoms: Horizontal crack originating from cowl area, no impact point, Crack starting at windshield base near wiper assembly, Progressive spread across field of view
Fix: 2020 had a recall for windshield bonding, but stress cracks from cowl flex continue to appear post-repair. Insurance typically covers, but verify proper OEM glass and primer during replacement. 2-3 hours labor.
Estimated cost: $400-800 (often insurance-covered)
Water Pump Failure (3.6L Pentastar V6)
Occasional · high severityTypical onset: 70,000-110,000 mi
Symptoms: Coolant weeping from weep hole below pump, Squealing or grinding from front of engine, Overheating, coolant loss with no visible external leak, Pink residue on front of engine block
Fix: Pentastar water pumps fail at the shaft seal or bearing. Timing cover removal required on many—not a quick roadside fix. 4-6 hours labor. Replace thermostat and hoses while in there.
Estimated cost: $800-1,400
Rear Differential Pinion Seal Leak (V8 Models, Especially Scat Pack/Hellcat)
Occasional · low severityTypical onset: 50,000-100,000 mi
Symptoms: Gear oil dripping at front of differential, visible on driveshaft, Burnt gear oil smell after spirited driving, Low differential fluid level on check, Whine or howl from rear end if run low
Fix: Pinion seal wears from driveline angle and load. Driveshaft removal, seal replacement, fluid refill. Inspect pinion bearing preload during repair. 2-3 hours labor.
Estimated cost: $400-700
V6 Chargers are solid daily drivers with typical maintenance; Hemi V8 buyers should budget $5k-10k for eventual lifter/cam work or walk away—great platform when healthy, but the 2020 5.7L/6.4L cam failure rate is unacceptable for the money.
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.