OEM Exhaust Brake Solenoid Valve 8-97374152-2 with Gaskets for ISUZU NPR 4HK1 — 12 Months Warranty
| OEM Part Number: | 8-97374152-2 / 8973741522 | Includes: | Gaskets |
| Engine Compatibility: | ISUZU 4HK1 5.2L, 4HE1 4.8L | Vehicle Models: | ISUZU NPR, NQR, NRR, NPR-HD |
| Material: | High-strength Aluminum Alloy & Precision Bearings | Cooling Type: | Engine Coolant Circulation |
| Installation: | Direct OEM Replacement | Durability Rating: | 400,000+ Km |
| High Light: | OEM Part Number 8-97374152-2 Exhaust Brake Solenoid Valve,Includes Gaskets Magnetic Valve,12 Months Warranty Electric Solenoid Valve |
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The Exhaust Brake Solenoid Valve (Magnetic Valve) with OEM numbers 8-97374152-2 and 8973741522 is a verified OEM-grade direct replacement for ISUZU NPR, NQR, and NRR series trucks equipped with 4HK1 5.2L and 4HE1 4.8L diesel engines. This electrically-actuated solenoid valve controls compressed air or engine vacuum to actuate the exhaust brake butterfly valve, creating backpressure for controlled vehicle deceleration.
If your exhaust brake solenoid valve is failing, you may experience:
- Exhaust Brake Inoperative: The exhaust brake fails to engage when activated
- Intermittent Exhaust Brake Operation: Works sporadically or only under certain conditions
- Check Engine / Warning Light: Dashboard warning light related to exhaust brake system
- Reduced Braking Performance: Noticeable reduction in engine braking effectiveness
- Air Leakage: Hissing or audible air leakage from the valve area
| Part Number | 8-97374152-2 8973741522 |
|---|---|
| Product Name | Exhaust Brake Solenoid Valve |
| Car Model | ISUZU NPR |
| Engine Model | ISUZU 4HK1 |
| Condition | 100% Brand New |
| Origin | China Mainland |
| Brand | Model | Series / Chassis | Engine | Years |
|---|---|---|---|---|
| ISUZU | NPR | N-Series | 4HK1 5.2L, 4HE1 4.8L | 1995-2007 |
| ISUZU | NQR | N-Series | 4HK1 5.2L, 4HE1 4.8L | 1995-2007 |
| ISUZU | NRR | N-Series | 4HK1 5.2L, 4HE1 4.8L | 1995-2007 |
| ISUZU | NPR-HD | N-Series | 4HK1 5.2L | -- |
| Engine Code | Displacement | Fuel Type | Application |
|---|---|---|---|
| 4HK1 | 5.2L (5193cc) | Diesel Turbo | NPR, NQR, NRR, NPR-HD |
| 4HE1 | 4.8L (4775cc) | Diesel | NPR, NQR, NRR |
| Feature | Benefit + Verification Signal |
|---|---|
| OEM Specification — ISUZU Genuine | Guarantees factory-fit quality and performance — verified by ISUZU OEM part numbers |
| Electric Solenoid Valve Design | Provides reliable, on-demand exhaust brake actuation for controlled deceleration |
| Includes Gaskets | Complete replacement solution — no need to purchase additional seals |
| Heavy-Duty Construction | Built to withstand under-chassis conditions, vibration, and extreme temperatures |
| Direct Bolt-On Fitment | No modifications required — verified by 99% installation success rate |
| 100% New — No Core Charge | Guarantees zero wear, immediate performance, and full service life |
| QC Item | Verification Method |
|---|---|
| Dimensional Accuracy | Precision inspection to verify all mounting points match OE blueprint specifications |
| Solenoid Function Test | 100% electrical actuation test to verify valve opens and closes correctly |
| Leakage Test | 100% pressure decay test to guarantee zero air leakage in closed position |
| Seal Integrity Test | Full actuation cycling to verify gasket and seal durability |
| Durability Cycle Test | 500+ hour fatigue testing to verify 400,000+ km service life |
| Final Assembly Inspection | 100% visual and functional inspection before packaging |
Pre-Installation Checklist:
- Locate the exhaust brake solenoid valve on the right outer frame rail, in front of the air cleaner assembly
- Disconnect the battery negative terminal before starting work
- Allow the exhaust system to cool completely
- Inspect all air lines and electrical connectors for damage — replace if necessary
Installation Guidelines (Reference ISUZU workshop manual):
- Disconnect the negative battery terminal
- Locate the exhaust brake solenoid valve on the right outer frame rail
- Disconnect the electrical connector from the solenoid valve
- Disconnect the air lines from the valve (note positions for reinstallation)
- Remove the mounting bolts securing the valve to the frame rail
- Remove the old valve and clean the mounting surface thoroughly
- Install the new valve using the new gaskets provided
- Torque the mounting bolts to manufacturer's specified torque settings
- Reconnect all air lines securely
- Reconnect the electrical connector
- Reconnect the negative battery terminal
- Start the engine and test the exhaust brake function
- Check for air leaks around the valve connections
Maintenance Schedule:
- Inspection: Every 50,000 km / 12 months. Check exhaust brake function, listen for air leaks, and inspect electrical connections
- Replacement: Immediately if failure symptoms appear (exhaust brake inoperative, intermittent operation, or air leakage)
- Packaging: Each exhaust brake solenoid valve is securely packed in protective packaging to prevent shipping damage
- Includes: Solenoid valve + Gaskets
- Suitable for: Wholesale distributors, truck parts retailers, commercial vehicle repair shops, and fleet owners
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