Australian-built rear-drive sedan on Holden Commodore platform. Solid powertrain bones, but known for AFM lifter failures on V8s, transmission cooler line leaks, and suspension bushing wear. Parts availability declining as platform ages.
AFM Lifter Failure (V8 engines)
Common · high severityTypical onset: 60,000-120,000 mi
Symptoms: Loud ticking/tapping from engine on cold start that may not go away, Check engine light with P0300-series misfire codes, Loss of power, rough idle, dead cylinder
Fix: Active Fuel Management (AFM/DoD) lifters collapse due to oil pressure issues or debris. Requires cam and lifter replacement at minimum; many shops recommend AFM delete kit with tune. 12-18 labor hours depending on additional damage. Often find worn camshaft lobes requiring full top-end rebuild.
Estimated cost: $3,500-7,000
Transmission Cooler Line Leaks
Common · high severityTypical onset: 80,000-140,000 mi
Symptoms: Transmission fluid dripping near radiator or under driver side, Low fluid warnings or erratic shifting, Pink/red fluid puddles under vehicle
Fix: Steel cooler lines corrode where they connect to radiator and at crimped fittings. Line rupture leads to rapid fluid loss and transmission failure. Replace both lines plus external cooler refresh. 2-4 hours labor. Catch early or expect transmission rebuild.
Estimated cost: $400-800
Rear Differential Bushing Failure
Common · medium severityTypical onset: 70,000-110,000 mi
Symptoms: Clunking on acceleration or deceleration, Vibration through chassis at highway speeds, Visible movement of differential housing under load
Fix: Front diff mount and carrier bushings deteriorate, especially with V8 torque. Requires subframe drop to access properly. Polyurethane upgrades available but increase NVH. 4-6 hours labor with alignment.
Estimated cost: $600-1,200
Control Arm Bushing Wear (Front & Rear)
Common · medium severityTypical onset: 60,000-100,000 mi
Symptoms: Wandering steering, loose feel on highway, Clunking over bumps, Uneven tire wear, alignment won't hold
Fix: Multi-link suspension uses numerous rubber bushings that deteriorate with age and abuse. Rear trailing arm bushings especially problematic. Budget for full suspension refresh if buying high-mileage. 6-10 hours for comprehensive job with alignment.
Estimated cost: $1,200-2,000
Fuel Pump Control Module Failure
Occasional · high severitySymptoms: No-start condition, cranks but won't fire, Intermittent stalling, usually when hot, Fuel pump not priming on key-on
Fix: Module mounted on fuel tank fails due to heat and vibration. Often misdiagnosed as fuel pump itself. Module replacement: 1.5-2 hours. If pump also replaced while tank is down, add $300-500.
Estimated cost: $400-700
Timing Chain Stretch (3.6L V6)
Occasional · high severityTypical onset: 120,000-180,000 mi
Symptoms: Rattling on cold start for 2-3 seconds, Check engine light with cam/crank correlation codes (P0008, P0014), Poor fuel economy, loss of power
Fix: High-feature V6 uses four chains; primary chains stretch with age. Requires front-cover-off procedure, replace all chains, guides, tensioners, and phasers. 10-14 hours labor. Preventive maintenance: change oil every 5k miles religiously.
Estimated cost: $2,800-4,200
Water Pump Failure (All engines)
Occasional · medium severityTypical onset: 80,000-120,000 mi
Symptoms: Coolant weeping from weep hole below pump, Squealing or grinding from front of engine, Overheating, low coolant warnings
Fix: Factory pumps last 80-100k typically. Replace with thermostat and hoses while in there. V6: 3-4 hours. V8: 2-3 hours (easier access). Failure can contaminate oil if internal seal goes.
Estimated cost: $500-900
Buy a low-mileage GT or GXP if you can wrench and AFM-delete immediately; otherwise the V6 is more reliable but boring — either way, factor $2k+ for deferred suspension work on anything over 80k miles.
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.