Denso 3043 Spark Plug

Denso 3043 U-Groove Spark Plug

The Denso 3043 is a conventional spark plug built with a U-groove ground electrode to improve ignitability and support more efficient combustion. It is a direct-fit style ignition component for drivers servicing Saab and Volkswagen applications that call for this plug specification.

Key Features

• U-groove ground electrode tip design for improved spark exposure
• Copper center electrode core for stable heat transfer
• Nickel center electrode tip and nickel ground electrode material
• Standard ground configuration with a flat seat
• Pre-gapped to 0.8 mm for specified applications
• 14.00 mm thread diameter, 19.00 mm reach, and 20.6 mm hex size
• Manufacturer heat range 20

Product Details

As part of Denso’s U-Groove Conventional line, this spark plug focuses on reliable secondary ignition performance in a traditional plug format. The U-shaped ground electrode helps expose the spark kernel more effectively, which can support cleaner combustion and consistent engine operation. The Denso 3043 cross-references Denso Auto Parts W20EP-U and is listed for Saab 83 50 076 and Volkswagen N01 781 178 applications.

For buyers searching for a Denso 3043 spark plug, Denso W20EP-U replacement, or a Saab/Volkswagen ignition tune-up part, this plug matches the specified thread, reach, seat type, and electrode construction needed for the application.

What It Helps Address

• Hard starting caused by worn or fouled spark plugs
• Rough idle from inconsistent ignition firing
• Misfire conditions related to degraded plug electrodes
• Reduced fuel efficiency from weak spark delivery
• Loss of throttle response from aged secondary ignition components

Installation Notes and Tips

Verify the engine calls for a 14.00 mm thread diameter, 19.00 mm reach, flat seat, and 0.8 mm pre-gap before installation. Check the existing plug specification against the vehicle service information for Saab and Volkswagen models, and confirm the correct heat range and hex size before tightening. For best results, inspect ignition wires or coil-on-plug components at the same time to avoid repeat misfire diagnosis.

Quality Assurance

Denso’s U-Groove Conventional line is built around a proven spark plug design that emphasizes dependable ignition performance and efficient combustion characteristics. This part is manufactured to the listed OE-style specifications for the stated applications.