Toyota Camry/Alphard/Corolla/Lexus Spark Plug Q16-U 90919-YZZAA

If your vehicle experiences weak acceleration, idle jitter, noticeably higher fuel consumption, or cold-start difficulties, spark plug electrodes are severely aged and ignition energy is insufficient. Spark plugs ignite the air–fuel mixture to ensure smooth engine operation and power delivery. Compatible with Toyota Camry, Alphard, Crown, and many Lexus models post-2000; OEM numbers 90919-YZZAA / Q16-U. Install with a torque wrench to manufacturer torque specifications and ensure spark plug gap matches engine requirements to avoid over-tightening or under-tightening.