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Exhaust Brake Solenoid Valve 8-97374152-2 8973741522 for ISUZU NPR 4HK1 — OEM Electric Mag Valve
Product Overview
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.
✅Real Shop Test Data: Precision-engineered electric solenoid valve delivers reliable exhaust brake actuation
✅Proven Durability: Built with OEM-grade materials rated for 400,000+ km under normal operation
✅Installation Success Rate: 99% direct bolt-on fitment confirmed across thousands of repair orders
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
⚠️ A failing exhaust brake solenoid valve compromises vehicle braking performance, especially under heavy loads — prompt replacement is essential to maintain safe deceleration and reduce service brake wear.
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
Vehicle & Engine Compatibility
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
Appliion
4HK1
5.2L (5193cc)
Diesel Turbo
NPR, NQR, NRR, NPR-HD
4HE1
4.8L (4775cc)
Diesel
NPR, NQR, NRR
⚠️ Important: This exhaust brake solenoid valve is designed for ISUZU 4HK1 5.2L and 4HE1 4.8L diesel engines. Fits ISUZU N-Series (NPR, NQR, NRR, NPR-HD) trucks. Loed on the right outer frame rail, in front of the air cleaner assembly. Please verify your vehicle's model, chassis code, and engine code (4HK1 or 4HE1) before ordering.
Features & Benefits
Feature
Benefit + Verifiion Signal
OEM Specifiion — 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 modifiions required — verified by 99% installation success rate
100% New — No Core Charge
Guarantees zero wear, immediate performance, and full service life
Quality Control & Verifiion
QC Item
Verifiion Method
Dimensional Accuracy
Precision inspection to verify all mounting points match OE blueprint specifiions
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
Installation & Maintenance Recommendations
⚠️ IMPORTANT: Professional Installation Recommended
Pre-Installation Checklist:
Loe 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
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 ...