Preheating Relay 3735920LD291 for JAC N56/N75/N80/N120 — Verified OEM IZUMI Relay, 3-Month Warranty
Key Attributes
Product Summary
IZUMI Preheating Relay 3735920LD291 is a verified OEM direct-fit for JAC N56/N75/N80/N120 trucks, ensuring reliable cold starts. Features sealed housing, high-current contacts, and 100% coil/contact testing. Backed by a 3-month warranty and custom packing options for B2B buyers.
Product Details
Preheating Relay for JAC N56
,OEM IZUMI Preheating Relay 3735920LD291
,JAC Preheating Relay with Warranty
IZUMI Preheating Relay 3735920LD291 is a verified direct-fit replacement for JAC N56, N75, N80, and N120 light trucks. Manufactured by IZUMI, this relay is a critical electrical component in the diesel engine cold-start system, responsible for switching power to the glow plugs during preheating. It ensures reliable engine cranking in low-temperature conditions by activating the glow plugs for the required duration.
- ✅Real Shop Test Data: 100% coil resistance and contact continuity tested — coil resistance verified at [Insert value, e.g., XX Ω] at 20°C, contact resistance ≤ [Insert value, e.g., 50 mΩ] [Report No. YM-PR-2025-XX].
- ✅Proven Durability: Rated for [Insert cycles, e.g., 100,000+] switching cycles at rated load — verified by [Insert test method, e.g., electrical endurance bench test] [Report No. YM-PR-2025-XX]. IZUMI brand with 3-month warranty.
- ✅Installation Success Rate: [Insert %] direct plug-and-play fitment — confirmed across [Insert number] repair orders for JAC N-Series.
- ✅OEM Cross-Reference Verified: Replaces OEM 3735920LD291. Listed for JAC N56/N75/N80/N120 applications.
Replace your preheating relay if you notice any of the following:
- Hard cold starting — engine cranks but struggles to fire in low temperatures.
- Glow plug indicator light stays on or does not illuminate.
- No power at the glow plug bus bar despite ignition on.
- Relay clicking repeatedly or not clicking at all.
- Burn marks or melted plastic on the relay housing.
| Part Number | 3735920LD291 |
|---|---|
| Product Name | Preheating Relay |
| Car Model | JAC N56 / N75 / N80 / N120 |
| Engine Model | JAC N56 / N75 / N80 / N120 |
| Condition | 100% Brand New |
| Weight | Standard |
| Origin | China Mainland |
| Main Market | Middle East, Asia, Africa, South America, North America & Europe |
| Package | Neutral Packing or Made as Requested |
| Warranty | 6 Months |
| Price & Stock | Please contact us to get more information |
| Material | High-strength aluminum alloy & precision bearings |
| Cooling Type | Engine coolant circulation |
| Installation | Direct OEM replacement |
| Quality Standard | OEM equivalent / ISO quality control |
| Feature | Benefit + Verification Signal |
|---|---|
| IZUMI brand manufacturing | Consistent coil winding and contact material quality — backed by 3-month warranty. |
| Sealed housing | Protects against dust and moisture in engine bay — verified by [Insert IP rating or test method]. |
| [Insert feature, e.g., High-current contacts] | Handles repeated glow plug cycling without pitting — verified by [Insert cycles] endurance test. |
| Direct plug-and-play terminals | Eliminates wiring modification during installation — verified by fitment trials. |
| QC Item | Verification Method |
|---|---|
| Coil resistance | Multimeter — 100% batch sampling |
| Contact resistance | Milliohm meter — ≤ [Insert value] |
| Pickup/dropout voltage | Bench power supply — within [Insert V] range |
| Electrical endurance | [Insert cycles] switching test at rated load |
| Housing integrity | Visual and dimensional inspection |
| Terminal pull force | [Insert N] pull test |
- Locate the preheating relay in the engine bay fuse/relay box.
- Disconnect the battery negative terminal.
- Remove the old relay — note terminal orientation.
- Insert the new relay — align terminals with socket slots.
- Reconnect the battery and test cold-start preheating function.
- Confirm the glow plug indicator illuminates and extinguishes correctly.
Inspect relay terminals for corrosion every 20,000 km. Replace if cold starting becomes difficult.
- Each unit is packed in a neutral box or color box (custom packaging available), then in a reinforced carton.
- Suitable for: Wholesalers, electrical repair shops, fleet maintenance centers.
- MOQ: Small orders accepted; better prices for bulk orders.
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