NGK 92340 Diesel Glow Plug

NGK Diesel Glow Plug for Mercedes-Benz Diesel Engines

NGK Glow Plug 92340 is a diesel glow plug built with a ceramic-type material and OE-focused specifications for select Mercedes-Benz diesel applications. It uses a 12V system, pin terminal, flat seat, M4 terminal thread size, and an 8 mm hex for serviceability in the correct engine platform.

Compatible With Mercedes-Benz GLE300d, GLS350d, Sprinter 2500, Sprinter 3500, E250, GL350, GLE350d, GLK250, ML250, ML350, and S350 applications listed below. Part number 92340 is also referenced as CZ551 for identification and ordering.

Key Features

• Ceramic-type diesel glow plug construction
• 12V system voltage with 7.00 voltage specification
• Pin terminal design with M4 terminal thread size
• Flat seat and 8 mm hex size
• Overall length: 6.24 in
• Thread diameter: 0.391 in
• OE-focused NGK Glow Plug application for Mercedes-Benz diesel engines

Product Details

NGK 92340 is part of NGK’s glow plug line, backed by the company’s long history as an OE supplier and ignition specialist. For diesel engines, the glow plug supports cold-start combustion by heating the pre-combustion chamber or combustion area before and during startup, helping the engine reach stable ignition conditions in low-temperature operation. This part is listed for multiple Mercedes-Benz diesel models, including 2013-2017 Mercedes-Benz GL350, ML350, and Sprinter 2500/3500 applications, along with 2016-2017 Mercedes-Benz GLE300d and 2017 Mercedes-Benz GLS350d coverage.

This part cross-references Four Seasons 92340 and A0011597301 for the same application.

What It Helps Address

• Hard starting in cold weather on Mercedes-Benz diesel engines
• Extended cranking before the engine fires
• Rough initial idle after startup
• Glow plug fault codes tied to the listed OE-style application
• Reduced cold-start combustion support in diesel operation

Installation Notes and Tips

Verify the engine application, thread size, and overall length before installation. This glow plug is listed with M10 thread-size application notes in the fitment data, so confirm the engine-specific OE requirement before ordering. Use care during removal and installation to avoid damage to the cylinder head threads, and follow the vehicle service procedure for torque and electrical connection checks. Confirm the pin terminal and flat-seat configuration match the original part.

Quality Assurance

NGK is a major OE supplier with extensive North American manufacturing and distribution support, and this glow plug reflects that OE-oriented approach to durability and operational performance. The part is built to original equipment standards for the listed Mercedes-Benz diesel applications.

Compatible Vehicles

• Fits 2016-2017 Mercedes-Benz GLE300d, N/A; Glow Plug w/ M10 Thread Size; Overall Length 158.6mm; Actual OE Manufacturer; NGK Glow Plug
• Fits 2017 Mercedes-Benz GLS350d, N/A; OE Manufacturer Diesel Glow Plug Application; NGK Glow Plug
• Fits 2014-2017 Mercedes-Benz Sprinter 2500, N/A; Glow Plug w/ M10 Thread Size; Overall Length 158.6mm; Actual OE Manufacturer; NGK Glow Plug
• Fits 2014-2017 Mercedes-Benz Sprinter 3500, N/A; Glow Plug w/ M10 Thread Size; Overall Length 158.6mm; Actual OE Manufacturer; NGK Glow Plug
• Fits 2014-2016 Mercedes-Benz E250, N/A; Glow Plug w/ M10 Thread Size; Overall Length 158.6mm; Actual OE Manufacturer; NGK Glow Plug
• Fits 2014-2016 Mercedes-Benz GL350, N/A; OE Manufacturer Diesel Glow Plug Application; NGK Glow Plug
• Fits 2016 Mercedes-Benz GLE350d, N/A; OE Manufacturer Diesel Glow Plug Application; NGK Glow Plug
• Fits 2013-2015 Mercedes-Benz GLK250, N/A; Glow Plug w/ M10 Thread Size; Overall Length 158.6mm; Actual OE Manufacturer; NGK Glow Plug
• Fits 2015 Mercedes-Benz ML250, N/A; Glow Plug w/ M10 Thread Size; Overall Length 158.6mm; Actual OE Manufacturer; NGK Glow Plug
• Fits 2014-2015 Mercedes-Benz ML350, N/A; OE Manufacturer Diesel Glow Plug Application; NGK Glow Plug
• Fits 2013 Mercedes-Benz GL350, N/A; From Engine 41324859; Actual OE Manufacturer; NGK Glow Plug
• Fits 2013 Mercedes-Benz ML350, N/A; From Engine 41324859; Actual OE Manufacturer; NGK Glow Plug
• Fits 2013 Mercedes-Benz S350, N/A; From Engine 41324859; Actual OE Manufacturer; NGK Glow Plug