Review on 🔌 Reliable Performance: Denso (3297) SK20R11 Spark Plugs 4-Pack for Enhanced Engine Efficiency by Bob Schultz

My Toyota Camry Hybrid had some engine vibration when stopped at traffic lights and vibration/hum when restarting the engine while accelerating. At first I thought it might be an engine mount problem, but some internet research showed it was the spark plugs (I've done 118,000 miles) and replacing the spark plugs with these genuine Denso spark plugs completely changed the situation. The old spark plugs were dirty and the electrodes seemed unusually short. After installing new candles, the car started almost like new, with no vibrations and engine noise.