丰田汉兰达 皇冠 点火线圈 90919-C2001 90919-C2004 高压包 替换升级

Toyota Highlander, Crown and other four-cylinder models replacement/upgraded ignition coil, directly matches OEM numbers 90919-C2001 and 90919-C2004; broad compatibility. Core function is to boost low-voltage electricity to provide sufficient energy to the spark plug to ignite the air-fuel mixture, ensuring engine stable operation. Installation fixes acceleration jitter, rough idle, and power drop; fuel economy can improve. If starting is difficult, acceleration is erratic, or engine warning light is on, ignition coil aging is indicated; replacement restores smooth operation.