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The Green Spark Plug Company£37.92Visit shop Ngk Glow Plug Cz203 (94339) New Ngk-Cz203 Size 20
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This guide is for owners of HYUNDAI i40 VF 1.7D models (2011-2019) with the D4FD engine. The NGK Glow Plug CZ203 (94339) ensures reliable engine starting in cold conditions by providing precise heat to the combustion chamber. A key benefit is its direct replacement fit for OEM parts, simplifying installation. However, ensure compatibility with your specific vehicle's engine code and manufacturing year before purchasing.
| Model Part Number | 94339 |
|---|---|
| Brand | NGK |
Symptoms include difficulty starting in cold weather, rough idling after startup, or a 'check engine' light related to the glow plug system. A mechanic can perform tests to confirm.
It is highly recommended to replace all glow plugs simultaneously. This ensures consistent heating across all cylinders, leading to balanced engine performance and preventing premature failure of a new plug if others are weak.
Glow plug lifespan varies depending on usage and climate. However, they are designed for durability. Regular checks during scheduled maintenance are advised, and replacement is typically needed when starting issues arise.
The resistance value indicates the electrical impedance of the glow plug. This specific value is designed to work optimally with the vehicle's electrical system and glow plug control module for efficient heating.
While cross-references are provided, using a reputable brand like NGK ensures quality and compatibility. Always ensure any alternative part meets or exceeds the OEM specifications for your vehicle.
The overall length of the NGK Glow Plug CZ203 (94339) is 133.0 mm.
The fitting depth for this glow plug is 30.0 mm.
Check if glow plugs are functioning. Test resistance and ensure they are receiving power. Replace any faulty glow plugs.
One or more glow plugs may not be heating correctly or are malfunctioning. Test and replace as needed.
Scan the vehicle's OBD-II system for specific glow plug error codes. Diagnose and replace the affected glow plug(s) or related control module.
This is a serious issue requiring professional extraction. Do not attempt to force removal if a glow plug is seized, as it can break off inside the cylinder head.
Compatibility Check: Before installation, verify that your vehicle is a HYUNDAI i40 VF 1.7D manufactured between 2011 and 2019 with the D4FD engine. Confirm that your current glow plugs are part number 367102A700 (OEM) or equivalent cross-references. The thread size (M10 x 1.25), spanner size (12 mm), and voltage (11.0 V) must match.
Installation: Installation requires removing the engine cover and potentially other components to access the glow plugs. It is strongly recommended that this procedure be performed by a qualified mechanic. Ensure the new glow plugs are tightened to the manufacturer's specified torque to prevent damage. After installation, reconnect all removed components.
Care: Glow plugs are wear-and-tear items and do not require routine maintenance beyond ensuring they are functioning correctly. If you experience starting difficulties, have the glow plug system inspected. It is best practice to replace glow plugs in sets (all four) to ensure uniform heating and performance.
