Denso 673-1203 Direct Ignition Coil

Denso Direct Ignition Coil 673-1203

Denso 673-1203 is a direct ignition coil in the Coil on Plug line, built for 12-volt operation with a black housing and a single female tower. It is a direct replacement ignition coil for select Lexus and Toyota applications, including Lexus GS300, IS300, SC300, and Toyota Supra models with coil-on-plug ignition.

Key Features

• Direct ignition coil for coil-on-plug systems
• 12-volt electrical specification
• Black finish
• Single female tower connection
• OE-style replacement for select Lexus and Toyota vehicles

Coil on Plug Product Line

Denso’s Coil on Plug line focuses on stick-coil ignition applications where each coil mounts directly over the spark plug. For Lexus GS300, Lexus IS300, Lexus SC300, and Toyota Supra coil-on-plug setups, this format supports precise ignition control and straightforward OE-style service replacement. The Denso 673-1203 is part of that application-specific lineup.

Detailed Description

Denso 673-1203 is engineered as a direct ignition coil for vehicles using coil-on-plug ignition architecture. It is listed for 1998-2005 Lexus GS300, 2001-2005 Lexus IS300, 1998-2000 Lexus SC300, and 1998 Toyota Supra, all in N/A position applications noted as coil on plug. This part cross-references Toyota 90919-02216 and Lexus 90919-02216 for the same application. If you are searching for a Lexus GS300 ignition coil, Lexus IS300 coil on plug replacement, or Toyota Supra ignition coil 673-1203, this part matches those vehicle-specific needs.

Common Issues This Part May Address

• Engine misfire caused by a weak ignition coil
• Rough idle related to inconsistent spark output
• Hard starting from degraded coil performance
• Loss of acceleration response tied to ignition breakdown
• Check engine light conditions associated with ignition coil faults

Installation Notes and Tips

Verify the vehicle’s year, make, model, and coil-on-plug configuration before ordering. Confirm the electrical connector style, including the female tower design, and match the 12-volt specification to the original part. For Lexus GS300, Lexus IS300, Lexus SC300, and Toyota Supra applications, inspect spark plugs and related ignition components during service to help isolate the root cause of the fault.

Quality Assurance

Denso states that this ignition coil is backed by extensive testing and inspection processes developed around its stick coil technology. The brand positions this part as an OE-level replacement built to meet the demands of select Lexus and Toyota ignition systems.