Bosch 0221604112 Ignition Coil

Bosch Ignition Coil for OE-Style Performance

The Bosch 0221604112 ignition coil is a pencil coil built for direct ignition systems that demand stable voltage and consistent spark delivery. It is a practical OE-style replacement for drivers looking to restore smooth engine operation, fuel efficiency, and lower exhaust emissions.

Compatible With 2004-2009 Cadillac CTS, 2005-2009 Cadillac STS, 2004-2006 Cadillac SRX, 2004-2006 Buick Rendezvous, 2005-2008 Buick LaCrosse, 2009 Buick Enclave, 2009 Chevrolet Traverse, 2009 GMC Acadia, 2009 Saturn Outlook, and 2006-2009 Saab 9-3 applications. This Bosch ignition coil, part number 0221604112, is also a direct cross-reference for URO 12629037 for the same application.

Key Features

• Bosch ignition coil, part number 0221604112
• Pencil coil design for direct ignition applications
• 14-volt coil specification
• SAE terminal type
• OE-quality ignition output for consistent spark delivery
• Supports smoother combustion and stable engine operation

Product Details

Bosch Ignition Coil (New) is engineered to deliver the correct ignition voltage needed for reliable combustion. The pencil coil format is commonly used in coil-on-plug systems, helping maintain strong spark energy at the plug for responsive starting, steady idle, and efficient engine performance. For vehicles such as the Cadillac CTS, Buick Enclave, and Saab 9-3, the Bosch 0221604112 provides a direct replacement option that aligns with original equipment expectations.

Bosch positions this ignition coil line around accurate voltage output, long spark duration, improved engine operating conditions, reduced fuel consumption, and lower exhaust emissions. Those characteristics make it a strong choice when replacing a failing coil on GM and Saab applications listed in the fitment data.

Common Issues This Part May Address

• Engine misfire under load or at idle
• Hard starting or extended crank time
• Rough running, hesitation, or stumble during acceleration
• Reduced fuel economy caused by weak ignition output
• Check engine light related to ignition coil performance

Installation Notes and Tips

Verify engine fitment by year, make, and model before installation. This ignition coil is listed as a direct-fit pencil coil for the applications shown, with one coil used per cylinder in the vehicle-specific ignition system. Inspect spark plugs, coil boots, and related connectors during service, since worn components can shorten coil life or contribute to repeat misfire symptoms.

Quality Assurance

Bosch is a recognized OE supplier in ignition components, and this coil is built to meet the voltage and spark requirements expected in original-equipment-style service. The Bosch 0221604112 is intended for dependable replacement use on the listed Cadillac, Buick, Chevrolet, GMC, Saturn, and Saab applications.