Toyota Avalon ignition coil failure with multiple pending issues and high repair costs on Toyota Avalon

Some Toyota Avalon owners report experiencing ignition coil failures, which can lead to misfires and the illumination of the check engine light, signaling the need for immediate attention. Specifically, the 2007 model has had four reported issues related to defective ignition coils, with an average repair cost of $1,870 at around 78,750 miles. Additionally, owners have noted five problems in the electrical system category associated with ignition coil failures, emphasizing the significance of this concern. Common causes of these failures include excessive engine vibration, heat and moisture exposure, and corroded terminals, which may require fixes such as replacing wires or cleaning connections. The financial impact of addressing these issues is notable, with average annual repair costs around $463. Moreover, some owners have experienced cutting out issues potentially linked to electrical problems in the main battery/ignition circuit, stemming from loose or corroded cables or faulty ignition relays. Ignition coil failure symptoms, such as the check engine light activating due to misfires, highlight the urgency of resolving these issues to prevent further complications and escalating repair expenses.