NGK 49173 Ignition Coil

NGK Ignition Coil for Audi and Volkswagen

Restore reliable spark delivery with the NGK COP (Pencil Type) Ignition Coil Multi-Pack, part number 49173. This distributorless 12-volt ignition coil is built to OE standards for consistent performance on late-model Audi and Volkswagen applications, including Audi A4, A5, Q5, Q7, TT, and Volkswagen GTI, Jetta, Passat, and Tiguan models.

NGK’s COP (pencil type) design uses a blade terminal layout with a female connector and male terminals for direct replacement service on compatible vehicles. Part number 49173 is also referenced as U5015-4 and is engineered for dependable ignition performance in modern coil-on-plug systems.

Key Features

• Distributorless COP (pencil type) ignition coil
• 12-volt electrical design
• Blade terminal type with 4 terminals
• Female connector gender and male terminal gender
• Oil-filled: No
• OE-style replacement for select Audi and Volkswagen engines
• Part number 49173 / U5015-4

Product Details

NGK builds ignition coils to meet or exceed OE standards, with development and testing performed in an ISO 17025 accredited lab under demanding conditions. That focus on durability and operational consistency makes this coil a practical choice for drivers servicing Audi A3, A4, A6, Q3, Q5, and Volkswagen CC, Eos, Golf, Jetta, Passat, and Tiguan platforms. The NGK COP (Pencil Type) Ignition Coil Multi-Pack is designed for direct-fit service where the original ignition system uses a pencil-style coil-on-plug layout.

This part cross-references DENSO Auto Parts 673-9303 and Delphi GN10322 for the same application.

What It Helps Fix

• Engine misfire under load or at idle
• Hard starting caused by weak ignition output
• Rough running and hesitation during acceleration
• Loss of power from inconsistent spark delivery
• Check engine light concerns related to ignition coil failure

Installation Notes and Fitment

Compatible With 2005-2016 Audi A4, N/A; 2005-2016 Audi A4 Quattro, N/A; 2010-2017 Audi A5 Quattro, N/A; 2011-2017 Audi Q5, N/A; 2009-2017 Volkswagen Tiguan, N/A; and other listed Audi and Volkswagen applications. Fits 2008-2010 Audi Q7, N/A, with Black Top Coil. Fits 2008-2009 Volkswagen Touareg, N/A, with Black Top Coil.

• Verify connector style, terminal layout, and coil shape against the original part before installation.
• Inspect spark plugs and related ignition components when replacing a failed coil.
• Confirm engine code and vehicle application for Audi A4, Volkswagen GTI, and Volkswagen Passat fitment.
• Use clean, dry electrical connections to support proper coil operation.

Quality Assurance

NGK backs this ignition coil with its OE-focused manufacturing approach and extensive coverage for late-model domestic and import vehicles. The part is developed and tested to support consistent ignition performance across the listed Audi and Volkswagen applications, including part number 49173.