The 2019 Peugeot 108 shares Toyota Aygo underpinnings with PSA's small-displacement engines. The 1.0L VTi is generally bulletproof, but the 1.2L PureTech has well-documented timing chain and oil system issues that can grenade the top end if ignored.
1.2L PureTech Timing Chain Premature Stretch/Failure
Common · high severityTypical onset: 40,000-80,000 mi
Symptoms: Rattling/whirring noise on cold starts that fades after warmup, Check engine light with cam/crank correlation codes, Loss of power or rough running, Metallic ticking from top of engine
Fix: Wet-belt timing system stretches due to oil quality issues or extended service intervals. Replacement requires timing chain, guides, tensioner, and often VVT solenoids. 6-8 hours labor. If belt debris contaminates oil system, expect lifter/cam damage requiring head work. Some engines fail catastrophically requiring full rebuilds.
Estimated cost: $1,200-2,800
Hydraulic Valve Lifter Collapse (1.2L PureTech)
Common · medium severityTypical onset: 50,000-90,000 mi
Symptoms: Persistent ticking/tapping from valve cover, Noise worsens when engine is hot, Gradual loss of performance, Excessive oil consumption in severe cases
Fix: Lifters fail due to contaminated oil from degraded timing belt material or poor maintenance. Requires cylinder head removal to replace all lifters, plus cleaning oil galleries. 8-10 hours labor. Always done with timing chain service if chain has failed.
Estimated cost: $1,800-3,200
Engine Mount (Transmission Mount) Failure
Common · low severityTypical onset: 60,000-100,000 mi
Symptoms: Clunking on acceleration or deceleration, Excessive vibration at idle, Shifter vibration or difficulty engaging gears, Engine rocks visibly when revved in park
Fix: Hydraulic transmission mount (actually engine mount) fails from age and stop-start system stress. Replacement is straightforward with engine support. 1.5-2 hours labor. OEM parts strongly recommended as aftermarket mounts fail quickly.
Estimated cost: $250-450
Head Gasket Failure (1.2L PureTech, Post-Timing Chain Damage)
Occasional · high severitySymptoms: White smoke from exhaust, Coolant loss with no visible leaks, Overheating, Milky oil on dipstick or oil cap, Bubbles in coolant reservoir
Fix: Usually secondary failure after timing chain issues cause overheating or detonation. Requires cylinder head removal, resurfacing, new gasket, and full timing system replacement. 10-14 hours labor. If head is warped beyond spec, replacement head adds $800-1,500.
Estimated cost: $2,200-4,500
Transmission Oil Cooler Line Leaks
Occasional · medium severityTypical onset: 70,000-120,000 mi
Symptoms: Transmission fluid puddle under vehicle, Burnt transmission fluid smell, Harsh shifting or slipping when fluid is low, Pink or red fluid visible near radiator area
Fix: Cooler lines or connections corrode and leak, especially in salt-belt states. Replacement involves draining transmission, replacing lines and fittings, then refill and relearn procedure. 2-3 hours labor plus fluid flush.
Estimated cost: $400-700
Harmonic Balancer Deterioration (1.2L PureTech)
Rare · high severityTypical onset: 80,000-120,000 mi
Symptoms: Visible wobble or separation of outer ring from hub, Loud squealing or grinding from front of engine, Serpentine belt throws or shreds repeatedly, Severe vibration at all RPMs
Fix: Rubber isolator fails causing outer ring to slip. If it separates completely, accessory belt fails and engine may be damaged. Replacement requires crankshaft front seal while apart. 2.5-3.5 hours labor.
Estimated cost: $450-800
Buy a 1.0L VTi with service records and it's a solid city car; the 1.2L PureTech is a ticking time bomb unless timing chain service is documented—budget $3k for inevitable engine 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.