NGK 49122 Ignition Coil

NGK COP Ignition Coil for Subaru Applications

The NGK COP Ignition Coil is built for direct ignition service on select Subaru models, including WRX STI, WRX, Impreza, Forester, and Legacy applications. This NGK ignition coil, part number 49122, uses a coil-on-plug design with electronic ignition control for clean, direct spark delivery.

NGK COP Ignition Coil 49122 is engineered to meet or exceed OE standards and is developed through rigorous testing in an ISO 17025 accredited lab. The NGK COP Ignition Coil line reflects NGK’s long history in ignition components and broad coverage for late-model domestic and import vehicles.

Key Features

• Coil-on-plug ignition coil for direct spark delivery
• 12-volt electronic ignition design
• Blade terminal connection with 3 male terminals
• Oil-filled: No
• Part number: 49122
• NGK part number: U5354

Detailed Product Overview

This ignition coil is designed for Subaru vehicles that use a COP ignition setup, helping restore proper spark output at the plug. It is a direct-fit style ignition component for 2010-2021 Subaru Legacy, 2011-2014 Subaru Impreza, 2011-2013 Subaru Forester, 2013-2014 Subaru WRX, and 2013-2021 Subaru WRX STI applications. If you are searching for an ignition coil for Subaru WRX STI 2013-2021 or an NGK ignition coil for Subaru Impreza 2011-2014, part number 49122 is the relevant reference.

This part cross-references Standard Ignition UF-665 for the same application.

Common Issues This Part Can Address

• Engine misfire caused by weak ignition output
• Rough idle from inconsistent spark delivery
• Hard starting related to ignition coil failure
• Loss of power under load from degraded coil performance
• Check engine light conditions tied to ignition coil faults

Installation Notes and Tips

Verify the connector style, terminal count, and vehicle application before installation. This coil uses a blade-style, 3-terminal male connection and is intended for COP ignition systems. Confirm the exact Subaru model year and engine configuration against the listed fitment before replacing the original coil. Part number 49122 should be matched to the vehicle’s OE reference when ordering.

Quality Assurance

NGK manufactures ignition coils to meet or exceed OE standards and validates designs under demanding test conditions in an ISO 17025 accredited laboratory. The brand’s OE-focused engineering and broad vehicle coverage support confident replacement selection for Subaru ignition service.