Walker 921-2087 Ignition Coil

Walker ThunderSpark Ignition Coil for Audi

Restore consistent spark output with the Walker ThunderSpark ignition coil, part number 921-2087. This ignition coil is listed for select Audi A4, A4 Quattro, A6, and A6 Quattro applications across the 2002-2006 model years.

Key Features

• Walker ThunderSpark ignition coil for OE-style ignition service
• Direct fitment for select Audi A4 and Audi A4 Quattro models
• Also listed for select Audi A6 and Audi A6 Quattro applications
• Part number 921-2087 for accurate ordering and catalog matching
• Single-coil application noted for 2005-2006 Audi A6 and A6 Quattro

Fitment Details

• Fits 2002-2005 Audi A4, N/A
• Fits 2002-2006 Audi A4 Quattro, N/A
• Fits 2002-2003 Audi A6, N/A; to chassis/VIN 4B-3-103-000; ThunderSpark
• Fits 2005-2006 Audi A6, N/A; Single Coil
• Fits 2002-2003 Audi A6 Quattro, N/A; to chassis/VIN 4B-3-103-000; ThunderSpark
• Fits 2005-2006 Audi A6 Quattro, N/A; Single Coil

What This Part Helps Address

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

Installation Notes

Verify the vehicle year, model, and chassis/VIN notes before ordering, especially for 2002-2003 Audi A6 and A6 Quattro applications. Confirm the existing coil style matches the listed ThunderSpark or single-coil configuration before installation. Part number 921-2087 should be matched against the vehicle catalog and the original coil location during service.

Quality Assurance

Walker ThunderSpark is the product line identified for this ignition coil, and part number 921-2087 is cataloged for the listed Audi applications. This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.