ISUZU NJ140 Rear Shock Absorber Assembly with Twin-Tube Hydraulic Design and Nitrile Rubber Bushings for OEM Fit
| Mounting Type: | Eye-to-Eye / Eye-to-Stem | Net Weight: | 20.4 Kg |
| Shock Type: | Twin-Tube Hydraulic | Bushing Material: | Nitrile Rubber |
| Piston Rod: | Chrome-Plated | Part Number: | 0503010002 / 05030-10002 |
| Vehicle Models: | ISUZU NJ140 / CYZ / CXZ / EXZ | Position: | Rear Axle — Left / Right |
| High Light: | Twin-Tube Hydraulic Rear Shock Absorber,Nitrile Rubber Bushings Shock Absorber Assembly,OEM Fit Suspension Shock Absorber |
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Rear Shock Absorber Assembly 0503010002 05030-10002 for ISUZU NJ140 CYZ CXZ EXZ — Verified OEM Fit Rear Suspension Shock Absorber with Bushings
The Rear Shock Absorber Assembly with OEM number 0503010002 is a verified direct-fit replacement for ISUZU NJ140 / CYZ / CXZ / EXZ medium and heavy-duty trucks. This shock absorber is a critical component of the rear suspension system, responsible for controlling spring oscillation, dampening road-induced vibrations, and maintaining tire contact with the road surface for safe vehicle handling and braking.
The rear shock absorber is a hydraulic damping device that converts the kinetic energy of suspension movement into thermal energy, which is then dissipated into the surrounding air. It is mounted between the vehicle's chassis frame and the rear axle, working in parallel with the leaf spring suspension.
When the vehicle encounters bumps, potholes, or uneven road surfaces, the rear shock absorbers compress and release hydraulic fluid under pressure, absorbing the energy from the impact. This action helps to minimize excessive bouncing or oscillation of the suspension, ensuring that the tires maintain consistent contact with the road for improved traction and handling.
The 0503010002 shock absorber features a twin-tube hydraulic design with a piston valve that controls oil flow between the inner and outer tubes during compression and rebound strokes. The chrome-plated piston rod ensures smooth operation and long seal life, while the nitrile rubber bushings at both mounting eyes isolate vibration and reduce noise transfer to the chassis.
Replace the rear shock absorber when any of these symptoms appear:
- Excessive bouncing or oscillation after hitting bumps — a worn shock absorber cannot control spring rebound, causing the vehicle to bounce excessively.
- Nose dive during braking or body roll during cornering — weakened damping allows excessive weight transfer, reducing stability.
- Uneven or accelerated tire wear — loss of tire contact with the road causes cupping or flat-spotting.
- Visible oil leakage from the shock absorber body — a leaking seal allows hydraulic oil to escape, reducing damping effectiveness.
- Knocking or clunking noise from the rear suspension — worn bushings or a loose shock absorber mount produce noise over bumps.
- Vehicle sagging at the rear — a completely failed shock absorber can contribute to rear suspension sag.
| Verification Item | Data / Standard | Source / Method |
|---|---|---|
| OEM Part Number | 0503010002 / 05030-10002 | Product listing |
| Part Name | Rear Shock Absorber Assembly | Product listing |
| Brand | YIMI / Zhengzhong (正众) | Product image |
| Vehicle Models | ISUZU NJ140 / CYZ / CXZ / EXZ | Product listing |
| Position | Rear Axle — Left / Right | Product listing |
| Shock Type | Twin-Tube Hydraulic | Product specification |
| Mounting Type | Eye-to-Eye / Eye-to-Stem | Product image |
| Bushing Material | Nitrile Rubber | Product specification |
| Net Weight (per unit) | 20.4 kg | Product listing |
| Specification | STD (Standard) | Product listing |
| Package | Neutral Carton / Customer Brand | Product listing |
| MOQ | Unlimited (better price for more quantity) | Product listing |
| Certification | ISO/TS 16949 | Third-party system audit |
Primary Applications
| Brand | Model | Chassis | Engine | Years |
|---|---|---|---|---|
| ISUZU | NJ140 | NJ140 | — | — |
| ISUZU | CYZ | CYZ | 6WF1 / 6WG1 | 1990s–2000s |
| ISUZU | CXZ | CXZ | 6WF1 / 6WG1 | 1990s–2000s |
| ISUZU | EXZ | EXZ | 6WF1 / 6WG1 | 1990s–2000s |
- This shock absorber is designed for the rear axle application. The front axle uses a different part number (0503010001).
- Confirm the mounting type (eye-to-eye or eye-to-stem), extended/collapsed lengths, and bushing sizes against your original component before ordering.
- Always replace shock absorbers in pairs (left and right) to maintain balanced damping performance.
- Torque the shock absorber mounting bolts to specification — verify against your ISUZU workshop manual.
- After installation, check wheel alignment to ensure proper steering geometry.
- For right-hand drive (RHD) vehicles, verify clearance and routing. Refer to the ISUZU workshop manual for the correct procedure.
| Feature | Benefit + Verification Signal |
|---|---|
| Twin-Tube Hydraulic Design | Consistent damping performance across all road conditions — verified by product specification. |
| Chrome-Plated Piston Rod | Smooth operation and long seal life — verified by product specification. |
| Nitrile Rubber Bushings | Isolates vibration and reduces noise transfer to the chassis — verified by product specification. |
| OEM-Exact Fitment | Direct replacement for 0503010002 / 05030-10002 without modification — confirmed by dimensional inspection against OEM specifications. |
| YIMI (Guangzhou) Manufacturing | Leading Chinese supplier of ISUZU truck parts with ISO/TS 16949 certification — verified by company profile. |
| ISO/TS 16949 Quality System | Full traceability with material certificates and batch inspection reports — third-party certified. |
| QC Item | Verification Method / Standard |
|---|---|
| Extended Length | CMM, 100% inspection |
| Collapsed Length | CMM, 100% inspection |
| Piston Rod Diameter | Micrometer, 100% inspection |
| Cylinder Bore Diameter | CMM, 100% inspection |
| Damping Force | Shock dyno test, batch sampling |
| Oil Leak Test | Pressure decay test, 100% inspection |
| Bushing Hardness | Durometer, batch sampling |
| Mounting Eye Diameter | CMM, 100% inspection |
| Surface Finish | Visual inspection — no cracks, no oil leakage, no corrosion |
| Batch Traceability | Material lot number + production date |
| Packaging Protection | Anti-rust oil + VCI film + carton |
⚠️ IMPORTANT: Suspension system service must be performed by a qualified technician. Always support the vehicle on a hoist and relieve suspension tension before removing the shock absorber. Always replace shock absorbers in pairs.
Installation Guidelines — Reference ISUZU Workshop Manual
- Preparation: Raise the vehicle on a hoist. Support the rear axle independently to relieve tension on the suspension.
- Removal: Remove the shock absorber mounting bolts at the upper and lower mounting points. Remove the old shock absorber. Inspect the mounting points for wear or damage.
- Inspection: Inspect the bushings for cracks or deterioration. Inspect the mounting bracket for corrosion or deformation. Clean all mating surfaces.
- Installation: Position the new shock absorber. Install the mounting bolts and hand-tighten. Torque to specification.
- Final Check: Verify the shock absorber is properly seated and the bushings are correctly positioned. Check for clearance between the shock absorber and surrounding components.
- Road Test: Lower the vehicle and perform a road test to verify proper damping performance and absence of noise.
Recommended Torque Values:
| Fastener | Torque |
|---|---|
| Shock Absorber Upper Mounting Bolt | Per ISUZU workshop manual specification |
| Shock Absorber Lower Mounting Bolt | Per ISUZU workshop manual specification |
Maintenance Schedule
- Every 10,000 km: Inspect shock absorbers for oil leakage and bushing wear. Check mounting bolt torque.
- Every 40,000–50,000 km: Inspect shock absorber damping performance. Replace if damping is weak or oil leakage is found.
- When excessive bouncing is detected: Replace shock absorbers immediately.
- Whenever the suspension is serviced: Inspect shock absorbers and replace if worn.
- Standard Packaging: Anti-rust oil + VCI film + neutral carton.
- Custom Packaging: Neutral box, color box, or customer-branded packaging.
- Suitable For: Suspension repair shops, ISUZU parts distributors, fleet maintenance centers.
- Supply Capacity: Stable batch supply with batch-level quality reports available.
- MOQ: Unlimited (better price for more quantity)
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