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Yimi (Guangzhou) Automotive Parts Co, Ltd

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China Quick On Start Thermo Switch for Isuzu NKR55 with 4JB1 Diesel Engine - Brass
China Quick On Start Thermo Switch for Isuzu NKR55 with 4JB1 Diesel Engine - Brass

  1. China Quick On Start Thermo Switch for Isuzu NKR55 with 4JB1 Diesel Engine - Brass
  2. China Quick On Start Thermo Switch for Isuzu NKR55 with 4JB1 Diesel Engine - Brass
  3. China Quick On Start Thermo Switch for Isuzu NKR55 with 4JB1 Diesel Engine - Brass

Quick On Start Thermo Switch for Isuzu NKR55 with 4JB1 Diesel Engine - Brass

  1. MOQ: 10 pcs
  2. Price: Negotiable
  3. Get Latest Price
Engine Appliion ISUZU 4JB1 (2.8L Diesel)
Supply Ability 10000 pcs/month
Cooling Type Engine coolant circulation
Delivery Time 5-8 Work Days
Installation Direct OEM replacement
Displacement 2.8L (2771cc)
Material Brass / plastic housing, temperature-sensing element
Payment Terms T/T,
Packaging Details Neutral Package or as customers’ request
Thread Size Tapered or straight threads (OE specific)
Certifiion ISO/TS16949
Part No 8-94457511-0, 8944575110, 8-94121152-1, 8941211521
Connector Type 1-pin or 2-pin (OE specific)
Model Number ISUZU NKR55
Place of Origin China
Brand Name YIMI

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  1. Product Details
  2. Company Details

Product Specification

Engine Appliion ISUZU 4JB1 (2.8L Diesel) Supply Ability 10000 pcs/month
Cooling Type Engine coolant circulation Delivery Time 5-8 Work Days
Installation Direct OEM replacement Displacement 2.8L (2771cc)
Material Brass / plastic housing, temperature-sensing element Payment Terms T/T,
Packaging Details Neutral Package or as customers’ request Thread Size Tapered or straight threads (OE specific)
Certifiion ISO/TS16949 Part No 8-94457511-0, 8944575110, 8-94121152-1, 8941211521
Connector Type 1-pin or 2-pin (OE specific) Model Number ISUZU NKR55
Place of Origin China Brand Name YIMI
High Light Quick On Thermo Switch for Isuzu NKR55 ,Brass housing thermo switch 4JB1 engine ,Direct replacement thermo switch Isuzu diesel
Quick On Start Thermo Switch 8-94457511-0 For Isuzu NKR55 4JB1 8944575110 Isuzu Truck Parts

Function: Quick On Start (QOS) thermo switch controls the glow plug pre‑heating duration based on coolant temperature. Enables reliable cold starts and reduces white smoke for Isuzu 4JB1 diesel engines.

Product Specifiions
Part Number 8-94457511-0, 8944575110, 8-94121152-1, 8941211521
Product Name Quick On Start Thermo Switch / QOS Switch / Glow Plug Thermal Switch
Car Model ISUZU NKR55
Engine Model ISUZU 4JB1 (2.8L Diesel)
Condition 100% Brand New
Origin China Mainland
Warranty 6 Months
Material High-strength aluminum alloy & precision bearings
Cooling Type Engine coolant circulation
Quick On Start Thermo Switch for Isuzu NKR55
Features & Advantages
  • OE Quality: Manufactured to Isuzu dimensional and electrical specifiions for perfect fit and accurate temperature sensing
  • Precise Switching: Controls glow plug pre‑heating time based on actual coolant temperature
  • Fast Cold Starts: Ensures proper pre‑glow duration for easy starting in cold weather
  • Durable Construction: Corrosion-resistant materials withstand coolant and temperature extremes
  • Restores Starting Performance: Eliminates hard starting, excessive glow plug cycling, or no pre‑heat
  • Direct Replacement: Simple screw-in installation - matches OE thread and connector
  • Cost-Effective: Affordable alternative to genuine Isuzu switches
Thermo Switch technical details and installation
Vehicle & Engine Compatibility

This Quick On Start thermo switch is specifically designed for Isuzu NKR55 trucks with 4JB1 engine.

Isuzu Truck Models:

  • ISUZU NKR55 (light-duty truck, 4JB1 engine)
  • May also fit other Isuzu models with 4JB1 engine (e.g., NPR, TFR) - verify compatibility

Engine Specifiion - ISUZU 4JB1:

  • 4-Cylinder, Inline Diesel, OHV
  • Displacement: 2.8L (2771cc)
Installation Notes

Installation steps (typical for QOS thermo switch):

  1. Disconnect battery negative cable
  2. Drain coolant to a level below the switch mounting loion
  3. Disconnect the electrical connector from the old switch
  4. Remove the old switch using a wrench
  5. Clean the threads in the cylinder head or thermostat housing
  6. Apply thread sealant to the new switch (if tapered threads) or use a new sealing washer (if straight threads)
  7. Install the new switch and tighten to specifiion (typically 15-25 Nm). Do not overtighten
  8. Reconnect the electrical connector
  9. Refill coolant and bleed the system
  10. Reconnect battery
  11. Start engine and check for leaks. Test cold start operation (when engine cooled down)
Quality Control
  • Temperature Test: Each switch tested for opening/closing at specified temperature range
  • Electrical Test: Continuity and switching function verified
  • Dimensional Inspection: Thread size, connector pin alignment, and housing dimensions verified
  • Leak Test: Sealing integrity checked
  • Visual Inspection: 100% checked for defects
  • Packaged Safely: Sealed in plastic bag, boxed with foam
Packaging and Delivery
  • Neutral export packing or customized packaging available
  • Carton or wooden case for safe transportation
  • Fast delivery for stock items
  • Shipping by Express Air or Sea

For pricing, availability, or bulk purchase of the Quick On Start Thermo Switch 8-94457511-0 For Isuzu NKR55 4JB1 8944575110 Isuzu Truck Parts, please contact our sales team for a competitive quote and expert technical support.

Company Details

Bronze Gleitlager

,

Bronze Sleeve Bushings

 and 

Graphite Plugged Bushings

 from Quality China Factory
  • Business Type:

    Manufacturer,Distributor/Wholesaler,Exporter,Trading Company,Seller

  • Year Established:

    2005

  • Total Annual:

    8000000-10000000

  • Employee Number:

    100~150

  • Ecer Certification:

    Verified Supplier

Yimi (Guangzhou) Automotive Parts Co., Ltd. Located in Guangzhou—the economic and transportation hub of Southern China—we are a specialized supplier and exporter with over 20 years of experience in the automotive parts industry. We focus on the production and sales of high-quality ... Yimi (Guangzhou) Automotive Parts Co., Ltd. Located in Guangzhou—the economic and transportation hub of Southern China—we are a specialized supplier and exporter with over 20 years of experience in the automotive parts industry. We focus on the production and sales of high-quality ...

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Get in touch with us

  • Reach Us
  • Yimi (Guangzhou) Automotive Parts Co, Ltd
  • Unit 1313, Building 5, Changsheng DDP Fashion Center, No. 17 Dachi Road, Tancun, Shijing Subdistrict, Baiyun District, Guangzhou City.
  • https://www.isuzucarsparts.com/

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