The 1990 LeBaron represents Chrysler's K-car derivative platform with notorious A413/A670 3-speed automatic transmission failures and engine durability issues, particularly on turbo four-cylinder models. Electrical gremlins and worn front suspension components are also endemic to this aging platform.
A413/A670 3-Speed Automatic Transmission Failure
Common · high severityTypical onset: 80,000-130,000 mi
Symptoms: Harsh 1-2 or 2-3 shifts, slipping in second gear, Delayed engagement when shifting into drive or reverse, Whining noise from torque converter or output shaft bearing, No movement in any gear (complete failure)
Fix: Rebuild or replacement required. Output shaft bearing failure is extremely common and contaminates the entire transmission with metal shavings. Rebuild takes 8-12 hours; used replacement 4-6 hours. New remans are scarce for this obsolete unit.
Estimated cost: $1,200-2,400
2.2L/2.5L Turbo Engine Head Gasket and Piston Failure
Common · high severityTypical onset: 90,000-140,000 mi
Symptoms: White smoke from exhaust, coolant consumption without external leaks, Overheating, especially under boost, Rough idle, misfires, loss of compression on one or more cylinders, Oil contamination in coolant or vice versa
Fix: Head gaskets blow between cylinders or into coolant jackets. Turbo heat accelerates failure. By this mileage, pistons often show ring land damage or skirt cracking. Head gasket alone: 6-8 hours. Full rebuild with pistons, bearings, valve seals: 18-24 hours.
Estimated cost: $800-1,200 (gaskets only); $2,500-4,000 (rebuild)
3.0L Mitsubishi V6 Main and Rod Bearing Failure
Occasional · high severityTypical onset: 100,000-150,000 mi
Symptoms: Knocking or ticking noise from lower engine, especially on cold start, Low oil pressure at idle when engine is hot, Metallic debris in oil on drain, glitter on dipstick, Sudden catastrophic failure with oil starvation
Fix: The 3.0L V6 suffers oil sludging if maintenance was neglected, starving bearings. Requires engine removal and full teardown to replace main and rod bearings. Often more cost-effective to swap in a used engine (8-10 hours) than rebuild (20-26 hours).
Estimated cost: $2,000-3,500 (used engine swap); $3,500-5,000 (rebuild)
Front Engine and Transmission Mount Collapse
Common · medium severityTypical onset: 70,000-110,000 mi
Symptoms: Clunking when shifting from park to drive or reverse, Excessive engine movement visible when accelerating or braking, Vibration through steering wheel and floorboards, Hood or fender contact marks from engine shifting
Fix: Hydraulic mounts deteriorate and collapse, allowing engine to rock excessively. Turbo models are harder on mounts. Replace all three mounts (right, front, trans): 2-3 hours total. Often transmission mount is worst.
Estimated cost: $300-550
Fuel System Rust and Filter Clogging
Occasional · medium severitySymptoms: Stumbling, hesitation, or stalling especially after sitting, Hard starting or no-start after tank is filled or sits for days, Loss of power under acceleration, surging at highway speed, Fuel pressure drops below spec (39 psi for turbo, 14.5 psi for non-turbo)
Fix: Steel fuel tanks rust internally on cars stored outdoors or in humid climates. Particulates clog filter and injectors. Filter replacement is cheap (0.5 hours), but often needs tank cleaning or replacement (4-6 hours) and injector service if contamination is severe.
Estimated cost: $40-120 (filter); $600-1,200 (tank replacement + lines)
Electronic Control Module (ECU/SMEC) Failure
Occasional · high severitySymptoms: No-start with no codes stored, no communication with scanner, Random stalling while driving, immediate restart possible, Erratic idle, stumbling, incorrect fuel mixture, Intermittent issues that clear with key-cycling
Fix: The Single Module Engine Controller (SMEC) on turbo models and SBEC on V6 suffer capacitor failures and solder cracks. Often heat-related. Replacement ECM 1-2 hours, but units are increasingly scarce. Rebuilders exist but turnaround is slow. Some symptoms mimic other issues, leading to misdiagnosis.
Estimated cost: $350-700 (remanufactured unit + programming)
Front Lower Control Arm Bushing and Ball Joint Wear
Common · medium severityTypical onset: 80,000-120,000 mi
Symptoms: Clunking over bumps, especially when turning, Loose, wandering steering feel, Uneven or feathered inner tire wear, Visible play when prying on suspension with bar
Fix: Front suspension uses pressed-in bushings and ball joints that wear and allow excessive play. Alignment becomes impossible to hold. Control arms often replaced as assemblies rather than pressing bushings. Per side: 1.5-2 hours.
Estimated cost: $250-450 (both sides)
Hard pass unless free—transmission and engine failures are not 'if' but 'when,' and parts availability is drying up for a 35-year-old economy platform.
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.