Denso 673-1203 Direct Ignition Coil

Reliable Ignition Coil for Lexus and Toyota Vehicles

The Denso 673-1203 ignition coil is designed to deliver consistent performance for select Lexus and Toyota models. This direct ignition coil ensures efficient spark delivery, supporting smooth engine operation in vehicles like the Lexus GS300 and Toyota Supra.

• 12-volt direct ignition coil for stable electrical performance
• Black color housing for durability and heat resistance
• Single tower with female terminal for precise connection
• Compatible with Lexus GS300, IS300, SC300, and Toyota Supra
• Part number 673-1203 for accurate replacement and fitment

About the Denso Coil on Plug Product Line

The Denso Coil on Plug product line features ignition coils designed to mount directly on the spark plug, eliminating the need for spark plug wires. This design reduces electrical losses and improves ignition reliability. The 673-1203 coil is part of this line, providing a direct ignition solution tailored for specific Lexus and Toyota models.

Product Details and Specifications

This Denso ignition coil operates at 12 volts and comes in a black housing that withstands engine bay conditions. It features a single tower with a female terminal, ensuring a secure and proper connection to the spark plug. The coil is engineered to meet the electrical and mechanical requirements of the Lexus GS300, IS300, SC300, and Toyota Supra, making it a precise replacement part identified by part number 673-1203.

Common Applications and Problem Resolution

• Restores proper ignition spark in Lexus GS300 and Toyota Supra engines
• Resolves engine misfires caused by faulty ignition coils
• Improves engine starting and idling stability
• Eliminates rough running conditions linked to ignition coil failure
• Prevents potential damage to ignition system components

Installation Notes and Tips

When installing the Denso 673-1203 ignition coil, ensure the engine is cool to avoid burns. Disconnect the battery before removal to prevent electrical shorts. Carefully remove the old coil and inspect the spark plug for wear. Install the new coil by aligning the female tower terminal securely onto the spark plug. Verify all connections are tight and free of corrosion before reconnecting the battery and testing engine operation.

Quality Assurance and Warranty

Denso ignition coils are manufactured to meet OEM standards for fit, form, and function. The 673-1203 coil undergoes rigorous testing to ensure durability and reliable performance under normal operating conditions. Warranty coverage details should be confirmed with the parts provider, as they may vary.