The 2019 S5 with the 3.0T EA839 engine is generally solid, but carries significant risk of catastrophic engine failure due to piston ring land issues that plague this generation. When maintained well and driven gently, it's a strong performer, but the engine rebuild frequency is concerning for a vehicle this young.
Piston Ring Land Failure / Catastrophic Engine Damage
Occasional · high severityTypical onset: 40,000-80,000 mi
Symptoms: Excessive oil consumption (1 quart per 1,000 miles or worse), White or blue smoke from exhaust on cold start or acceleration, Loss of power, misfires, check engine light with low compression codes, Metal shavings in oil, catastrophic knock if ringlands crack completely
Fix: Full engine rebuild or short block replacement required. Pistons, rings, honing cylinders, new bearings, head gasket set. 35-45 labor hours depending on shop speed and whether heads need machine work.
Estimated cost: $12,000-18,000
Transmission Oil Cooler Leaks
Common · medium severityTypical onset: 50,000-90,000 mi
Symptoms: Transmission fluid pooling under vehicle, usually passenger side, Low transmission fluid warning light, Harsh shifting or delayed engagement if fluid level drops significantly, Visible fluid weeping around cooler lines at transmission
Fix: Replace transmission oil cooler and lines, flush/refill with proper ZF 8-speed fluid. Cooler is integrated with housing, requires partial transmission disassembly or removal depending on access. 4-6 labor hours.
Estimated cost: $1,200-2,000
Transmission Mount Failure
Common · low severityTypical onset: 60,000-100,000 mi
Symptoms: Clunk or thud when shifting from Park to Drive or Reverse, Excessive vibration at idle in Drive, Lurching sensation during aggressive acceleration, Visible torn rubber or separation on mount during inspection
Fix: Replace transmission mount (often the rear mount fails first). Requires supporting transmission and removing cross-member hardware. 1.5-2.5 labor hours.
Estimated cost: $400-700
High-Pressure Fuel Pump (HPFP) Failure
Occasional · high severityTypical onset: 70,000-120,000 mi
Symptoms: Hard starting, extended cranking especially when hot, Rough idle, stumbling, or cutting out under load, Check engine light with fuel pressure/mixture codes (P0087, P0088), Metallic ticking noise from engine valley area
Fix: Replace high-pressure fuel pump on engine (camshaft-driven unit in valley). Includes new cam follower, gaskets, fuel system depressurization. Filter replacement recommended simultaneously. 3-4 labor hours.
Estimated cost: $1,800-2,800
Rear Subframe / Differential Bushing Wear
Occasional · medium severityTypical onset: 80,000-120,000 mi
Symptoms: Clunking over bumps from rear end, Wandering or vague steering feel at highway speeds, Uneven or accelerated rear tire wear on inside edges, Visible cracking or tearing of subframe bushings during alignment
Fix: Replace rear subframe bushings and/or differential mount bushings. Subframe must be dropped or lowered significantly. Alignment required after. 6-8 labor hours for full subframe bushing set.
Estimated cost: $1,500-2,500
Coolant Thermostat Housing Leaks
Occasional · medium severityTypical onset: 60,000-100,000 mi
Symptoms: Coolant smell in cabin or visible steam from engine bay, Coolant level dropping with no external puddles, Small drips or residue on thermostat housing (front of engine), Overheating if leak progresses and coolant loss is significant
Fix: Replace thermostat housing assembly and gasket, refill/bleed cooling system. Housing is plastic and prone to cracking. 2-3 labor hours.
Estimated cost: $600-1,000
Buy only with comprehensive warranty or detailed service records proving low oil consumption—engine rebuild risk makes this a gamble without coverage.
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.