1、Applicable Model: The glow plug is replacement for Isuzu NPR NQR, for 4BD2 3.9L diesel, for W3500 W4500 Forward, for W3500 W4500 Tiltmaster. 2、OE Number: The part numbers for reference are 8‑97028‑369‑0, Y‑718RS, the replacement part number is 203‑IS4BD2. Please confirm whether it is consistent with the OE you need to avoid wrong buying and other problems. 3、Enhanced Safety: The engine glow plugs feature double coil technology that maintain optimal heating temperature and protect from overheating. 4、Durable Construction: The glow plugs set is made of ABS and metal material and has a sturdy construction, highly resistant to impact and scratching, as well as being resistant to moisture and rust. 5、Easy to Install: The engine glow plugs have a simple installation, convenient and time saving, don't need too much tools or complicated steps.