The 2022 SQ8 uses the EA825 4.0L twin-turbo V8—a potent but problematic engine with catastrophic failure risks related to cylinder deactivation wear. While mechanically newer than problematic earlier generations, early examples are already showing expensive powertrain issues that can total the vehicle.
Cylinder Deactivation System Wear / Piston Ring Failure
Occasional · high severityTypical onset: 40,000-80,000 mi
Symptoms: Excessive oil consumption (1+ quart per 1,000 miles), Rough idle with misfires on deactivated cylinders (2, 3, 5, 8), Blue smoke on cold start or hard acceleration, Check engine light with lean/misfire codes (P0300-P0308, P050A)
Fix: Cylinder deactivation causes accelerated bore wear on specific cylinders. Repair requires engine-out long block replacement or full rebuild with new pistons, rings, honing, and sometimes crankshaft work. 35-50 hours labor depending on shop efficiency and parts availability.
Estimated cost: $18,000-28,000
Transmission Oil Cooler Leaks
Common · medium severityTypical onset: 30,000-60,000 mi
Symptoms: Transmission fluid pooling under vehicle front-center, Low transmission fluid warning on MMI screen, Harsh shifting or slipping when fluid is significantly low, Pink or red fluid visible at cooler line connections
Fix: The ZF 8HP transmission cooler develops leaks at crimp connections or internal seals. Requires cooler replacement, lines inspection, fluid flush. 4-6 hours labor. Common enough that many shops stock the part.
Estimated cost: $1,200-1,800
Backup Camera Failure / Black Screen
Occasional · low severitySymptoms: Backup camera shows black screen or "camera unavailable" message, Intermittent camera operation, works when cold then fails, NHTSA recall 22V-354 addresses early production units, May affect 360-degree camera system completely
Fix: Camera module failure or water intrusion into tailgate wiring harness. Recall covers some units; otherwise requires camera replacement and harness inspection. 2-3 hours labor if just camera, more if harness damage present.
Estimated cost: $800-1,400
Transmission Mount Failure
Common · medium severityTypical onset: 50,000-90,000 mi
Symptoms: Clunking when shifting from Park to Drive or Reverse, Vibration at idle in Drive with brake applied, Excessive drivetrain movement visible during acceleration/deceleration, Transmission housing contacting subframe in extreme cases
Fix: The hydraulic transmission mount deteriorates from heat and stress of 500 lb-ft torque. Requires lift access, subframe partial drop on some procedures. OEM mount mandatory—aftermarket fails quickly. 3-4 hours labor.
Estimated cost: $900-1,400
Fuel System Carbon Buildup (Direct Injection)
Common · low severityTypical onset: 60,000-100,000 mi
Symptoms: Rough idle, especially when cold, Misfires at startup (self-clearing), Reduced fuel economy and power loss at higher RPM, Failed emissions testing in strict states
Fix: Direct injection means no fuel washing intake valves. Walnut blasting required every 60-80k miles as preventive maintenance. Intake manifold removal necessary. 6-8 hours labor for proper service.
Estimated cost: $800-1,200
MMI Touch Screen Freezing / Unresponsive
Occasional · low severitySymptoms: Touch screen becomes unresponsive, requires restart, System reboot loops, takes 5+ minutes to start, Climate controls inaccessible when screen frozen, NHTSA recall 22V-666 addresses some software issues
Fix: MMI control unit software glitch or failing unit. Software update resolves some cases (1 hour), full unit replacement in others. Coding and calibration required. Recall covers partial population.
Estimated cost: $200-2,800
Only buy with remaining factory warranty or budget $20k+ for potential engine replacement—the EA825 V8 is a ticking time bomb despite being 2022.
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.