NGK 48728 Ignition Coil

NGK COP Ignition Coil for Audi, Porsche, Volkswagen

NGK Part Number 48728 is a COP (pencil type) ignition coil built for distributorless ignition systems. It is engineered to meet or exceed OE standards for durability and consistent ignition performance, making it a direct-fit choice for late-model Audi, Porsche, and Volkswagen applications.

The NGK COP (Pencil Type) Ignition Coil line reflects NGK’s long OE-focused manufacturing background and testing process. Each coil is developed and validated in an ISO 17025 accredited test lab under demanding conditions to support reliable spark delivery in modern engine management systems.

Key Features

• NGK ignition coil, Part Number 48728
• COP (pencil type) design for distributorless ignition systems
• 12-volt coil with female connector and male blade terminals
• 4-terminal configuration
• Oil filled: No
• Mounting bracket included: No
• OE-style construction for late-model import vehicle coverage

Detailed Description

This NGK ignition coil is intended for vehicles that use coil-on-plug ignition architecture, where each coil mounts directly at the spark plug location. That layout is common across Audi A4, A6, A7, A8, Q5, Q7, S4, S5, S6, S8, SQ5, R8, Porsche Cayenne, Porsche Panamera, and Volkswagen Touareg applications listed in the fitment data. If you are replacing a failing Audi Q7 ignition coil or sourcing an NGK 48728 coil for a Porsche Cayenne or Volkswagen Touareg, this part provides an OE-style replacement path.

This part cross-references Standard Ignition UF-529 and DENSO Auto Parts 673-9302 for the same application.

What It Helps Fix

• Engine misfire codes
• Rough idle and hesitation
• Hard starting caused by weak spark output
• Loss of acceleration under load
• Intermittent ignition performance on coil-on-plug systems

Installation Notes and Tips

• Confirm the connector style, terminal layout, and OE part match before installation.
• Inspect the spark plug and plug well for oil, moisture, or carbon tracking before installing the new coil.
• Replace damaged boots, seals, or spark plugs at the same time if wear is present.
• Clear diagnostic trouble codes after installation and verify engine operation.
• Use the vehicle-specific fitment list to confirm the correct application for your Audi, Porsche, or Volkswagen model.

Quality Assurance

NGK manufactures this ignition coil to meet or exceed OE standards and validates coil designs through rigorous testing in an ISO 17025 accredited laboratory. NGK’s OE legacy and broad late-model coverage support confident selection for repair and maintenance work.