NGK 5740 Diesel Glow Plug

NGK Glow Plug 5740 for Mercedes-Benz Diesel

The NGK Glow Plug 5740 is a diesel glow plug built for OE-style fitment and dependable cold-start performance. It is listed for select Mercedes-Benz E300 applications and uses a metal-type construction with a flat seat, pin terminal, and M4 terminal thread size.

NGK Glow Plug products draw on NGK’s long OE supply background and focus on original-equipment standards for durability and consistent operation. Part number 5740 is also referenced as Y-925J, making it easier to verify the correct diesel glow plug for your vehicle.

Key Features

• Diesel glow plug for select Mercedes-Benz E300 models
• OE equivalent design for factory-style replacement
• Metal type construction
• 12V system voltage with 11.50V rating
• Pin terminal with M4 terminal thread size
• Flat seat design
• Hex size: 12 mm
• Thread diameter: 0.469 in
• Length: 4.51 in
• Part number 5740, cross-reference Y-925J

Product Details

NGK 5740 is a diesel glow plug engineered for 1995-1999 Mercedes-Benz E300 applications, including 1995 models from 6/95 onward. It is a direct OE-equivalent style replacement for diesel engines that rely on precise preheating for reliable ignition during cold starts. If you are searching for an NGK glow plug for Mercedes-Benz E300 diesel service, part number 5740 provides the fitment and specifications needed for a proper match.

This glow plug is built around the listed electrical and dimensional specifications, including 12V system voltage, 11.50V voltage rating, M4 terminal thread size, and a flat seat. The NGK 5740 part number is commonly used when cross-checking diesel glow plug replacement needs for Mercedes-Benz E300 vehicles.

This part cross-references 250201054 for the same application.

Common Issues This Part May Address

• Hard starting in cold weather on diesel engines
• Extended cranking before the engine fires
• Rough initial idle after startup
• Glow plug warning concerns tied to worn heating elements
• Replacement needs for aging OE-style glow plugs

Installation Notes and Tips

Verify the vehicle year and engine application before ordering. Compatible with 1996-1999 Mercedes-Benz E300 and 1995 Mercedes-Benz E300 from 6/95 onward. Confirm terminal style, thread size, seat type, and overall length against the removed part before installation. Use proper diesel glow plug service procedures to avoid thread damage or electrical connection issues.

Quality Assurance

NGK is a long-established OE supplier with extensive North American and global manufacturing and distribution support. The brand’s focus on original-equipment standards and automotive expertise supports consistent product quality for diesel ignition service.