The 2017 Acura ILX with the 2.4L K24W7 engine is generally reliable but suffers from a critical engine oil dilution defect and a few transmission cooling/mount issues. The oil dilution problem can lead to catastrophic engine failure if ignored.
Engine Oil Dilution / Fuel in Crankcase (K24W7 Direct Injection)
Common · high severityTypical onset: 30,000-80,000 mi
Symptoms: Oil level rises noticeably between changes, Strong gasoline smell from dipstick, Check engine light with misfire codes (P0300-series), Rough cold starts, especially in winter, Eventual rod knock or spun bearings if neglected
Fix: Short-term: more frequent oil changes (every 3,000 mi) to dilute contamination. Long-term failure requires short block or complete engine replacement. Honda/Acura issued extended warranty coverage (settling class action), but many 2017s now outside window. Engine R&R is 18-24 labor hours.
Estimated cost: $6,000-9,500
Transmission Oil Cooler Line Corrosion / Leaks
Occasional · medium severityTypical onset: 60,000-100,000 mi
Symptoms: ATF puddles under front of vehicle, Transmission running hot, Burnt ATF smell, Slipping or delayed shifts when fluid is low
Fix: Cooler lines corrode at crimp points or where they pass through subframe. Replace both lines and top off ATF; flush if contaminated. About 2.5-3.5 hours labor depending on rust and access.
Estimated cost: $450-750
Transmission Mount Failure (Right Side)
Common · low severityTypical onset: 50,000-90,000 mi
Symptoms: Clunk on acceleration or deceleration, Vibration at idle in Drive, Visible engine sag when revving in Park
Fix: Hydraulic mount deteriorates, causing excessive drivetrain movement. Replacement is straightforward, 1.5-2 hours with engine support bar.
Estimated cost: $250-450
Driveshaft Snap Ring Detachment (Recall 19V-666)
Rare · high severitySymptoms: Sudden loss of power to wheels, Clunking from front differential area, Vehicle rolls freely in gear
Fix: NHTSA recall for improperly installed snap ring on right driveshaft — can pop out and cause driveshaft separation. Dealer inspection/replacement under recall, about 1 hour labor (free if recall not yet performed).
Estimated cost: $0 (recall)
Brake Master Cylinder Seal Leak (Recall 21V-426)
Rare · high severitySymptoms: Brake pedal slowly sinks to floor when held, Increased stopping distance, Brake warning light
Fix: Secondary cup seal in master cylinder can develop leak, allowing internal fluid bypass. Covered under recall — dealer replaces master cylinder, about 2 hours labor (free if recall open).
Estimated cost: $0 (recall)
Fuel Pump Failure (Low-Density Impeller, Recall 20V-134)
Occasional · high severityTypical onset: 40,000-80,000 mi
Symptoms: No-start or stalling while driving, Loss of power at highway speeds, Fuel pump whine from rear seat area, P0087 code (fuel rail pressure too low)
Fix: Denso pump impeller can crack/shed blades. Covered under recall 20V-134; dealer replaces entire pump module. If done outside recall, tank drop required, 3-4 hours labor.
Estimated cost: $0 (recall) or $800-1,200 (private repair)
Solid commuter if the oil dilution issue is monitored religiously and recalls are done, but that engine defect is a deal-breaker for many — budget for frequent oil changes or potential engine replacement.
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.