2022 LEXUS IS 300

Typical onset: 40,000-80,000 mi

Symptoms: Cold-start knock that persists beyond 10-15 seconds, Metallic rattling under load or acceleration, Low oil pressure warning at idle after warm-up, Metal shavings visible on oil change

Fix: Connecting rod bearings fail prematurely, often from oiling issues or sustained high-RPM abuse. Requires complete short block replacement or full engine rebuild with updated bearings. 18-24 labor hours at most shops. Some warranty coverage reported under 60k if documented properly.

Estimated cost: $6,500-12,000

Typical onset: 30,000-70,000 mi

Symptoms: Transmission fluid dripping near front of engine bay, Pink/red fluid pooling under vehicle after parking, Transmission running hotter than normal (if equipped with temp gauge), Delayed or harsh shifts when fluid level drops

Fix: Factory cooler lines crack at crimped fittings or corrode at junctions. Replace both feed and return lines as a pair, flush cooler. 2.5-3.5 hours labor. Lexus has revised part numbers but no formal recall yet.

Estimated cost: $800-1,400

Typical onset: 50,000-90,000 mi

Symptoms: Clunk when shifting from Park to Drive or Reverse, Excessive drivetrain vibration at idle in gear, Visible sagging or tearing of rubber mount bushings, Transmission shifts feel harsher than new

Fix: Rear transmission mount deteriorates from heat and torque cycling. Replace mount assembly. 1.5-2 hours labor including subframe access. OEM mount recommended over aftermarket for longevity.

Estimated cost: $350-650

Typical onset: 60,000-100,000 mi

Symptoms: Hard starting or extended cranking, especially cold, Intermittent loss of power under boost, Check engine light with P0087 (fuel rail pressure too low), Rough idle or misfires at operating temp

Fix: Direct-injection HPFP wears internally, loses pressure under demand. Replace pump and filter as assembly, clean fuel system. 3-4 hours labor. Use only OEM Denso parts—aftermarket failures are frequent.

Estimated cost: $1,200-2,000

Typical onset: 70,000-120,000 mi

Symptoms: Slight coolant loss without visible external leaks, White residue around head/block mating surface, Sweet smell from exhaust on cold start, Slowly rising coolant reservoir level from combustion pressure

Fix: Multi-layer steel gaskets can weep coolant externally or internally. Full head gasket replacement both banks (if V6) or single (turbo four). Turbo models: 12-14 hours including turbo removal and coolant flush. Resurface head if warpage detected.

Estimated cost: $3,500-5,500

Typical onset: 60,000-100,000 mi

Symptoms: Rough idle that smooths out at higher RPM, Hesitation or stumble during light throttle acceleration, Reduced fuel economy over time, Misfires on cold start (codes P0300-P0304)

Fix: Direct injection means no fuel washing valves—carbon accumulates. Walnut shell blasting of intake valves required. 4-5 hours labor. Preventive catch can installation ($400-600) helps but doesn't eliminate buildup.

Estimated cost: $600-1,000