2017 LEXUS IS 200T

Typical onset: 40,000-80,000 mi

Symptoms: Sudden loss of power with metallic knocking or rattling from engine, Check engine light with misfire codes (P0300-P0304), Rough idle and hesitation during light acceleration from stops, Engine dies completely or goes into limp mode

Fix: Low-speed pre-ignition causes piston ring land fractures and bearing damage. Repair requires complete short block replacement or full rebuild with updated pistons if available. 18-25 hours labor depending on whether you pull the engine. Many shops won't touch an in-frame rebuild on these—too much liability.

Estimated cost: $8,000-15,000

Typical onset: 30,000-60,000 mi

Symptoms: Progressive loss of power and throttle response, Rough cold starts with stumbling until engine warms, Misfires under load (codes P0301-P0304), Failed emissions testing due to incomplete monitors

Fix: Direct injection means no fuel washing the valves. Walnut blasting is the only real fix—remove intake manifold and manually blast each valve. 4-6 hours labor. This is maintenance on this engine, not a one-time fix; expect to repeat every 40,000-50,000 miles.

Estimated cost: $600-1,200

Typical onset: 60,000-100,000 mi

Symptoms: Transmission fluid puddles under engine bay, passenger side, Burnt transmission fluid smell after driving, Slipping or harsh shifts if fluid level drops significantly, Pink or red fluid visible on cooler lines near radiator

Fix: Cooler lines rust or crack at crimped fittings. Replace both lines and top off ATF—don't just patch one. 2-3 hours labor. Flush transmission if fluid was low long enough to cause slip codes.

Estimated cost: $400-800

Typical onset: 70,000-110,000 mi

Symptoms: Clunking when shifting from Park to Drive or Reverse, Vibration through cabin at idle in Drive with brake applied, Excessive engine movement visible during throttle blips, Transmission shifter feels loose or imprecise

Fix: Rubber mount deteriorates and allows drivetrain to shift excessively. Replace mount; sometimes the rear engine mount is bad too so inspect both. 1.5-2 hours labor.

Estimated cost: $300-600

Typical onset: 50,000-90,000 mi

Symptoms: Misfires on one or two cylinders (P030X codes), Fuel smell from exhaust during cold starts, Hard starting after hot soak (engine heat soaks injectors), Reduced fuel economy by 2-4 mpg

Fix: Direct injectors coke up or fail electrically. Replace failed injector(s) and consider doing all four if multiple have failed—they age together. 3-4 hours labor with manifold and fuel rail removal. Use OEM injectors; aftermarket quality is inconsistent.

Estimated cost: $800-1,600

Typical onset: 60,000-100,000 mi

Symptoms: Rattling noise from engine bay on cold start that disappears when warm, Overboosting or underperforming acceleration with P0234 or P0299 codes, Turbo whistle changes pitch or becomes louder, Reduced boost pressure felt during hard acceleration

Fix: Wastegate arm wears or actuator diaphragm fails. Turbo replacement is typical—wastegate isn't serviceable separately on most units. 6-8 hours labor due to tight engine bay. Aftermarket turbos are cheaper but OEM lasts longer.

Estimated cost: $2,000-3,500