Brake Master Cylinder Assembly 8-98127461-5 8981274615 For ISUZU NLR85/NMR71 4JJ1 3.0L Diesel — OEM Aluminium 1-1/8″ Bore
| OEM Part Number: | 8-98127461-5 / 8981274615 | Part Name: | Brake Master Cylinder Assembly |
| Bore Diameter: | 1-1/8″ (28.57mm) | Material: | High-Grade Aluminium |
| Application: | ISUZU NLR, NPR-PRO, NMR71 | Engine Compatibility: | ISUZU 4JJ1 3.0L Diesel |
| Condition: | Brand New — 100% Quality Inspected | Warranty: | 12 Months |
| High Light: | ISUZU NLR85 brake master cylinder,OEM aluminium master cylinder 1-1/8 bore,ISUZU 4JJ1 diesel truck brake cylinder |
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The Brake Master Cylinder Assembly with OEM number 8-98127461-5 (also listed as 8981274615) is a verified direct-fit replacement for ISUZU NLR and NMR series trucks equipped with the 4JJ1 3.0L diesel engine. Manufactured to ISUZU's stringent OEM specifications, this cylinder converts mechanical force from the brake pedal into hydraulic pressure for safe and controlled deceleration.
- Real Shop Test Data: Precision-engineered with a 1-1/8″ (28.57mm) bore verified against ISUZU OEM specifications
- Proven Durability: Constructed from high-grade aluminium for superior corrosion resistance and heat dissipation
- Installation Success Rate: 99% direct bolt-on fitment confirmed across thousands of repair orders
- OEM Cross-Reference Verified: Replaces 8-98127461-5, 8981274615, 8-98127-461-5
| Part Number: | 8-98127461-5 8981274615 |
| Car Model: | ISUZU NLR85/NMR71 |
| Engine Model: | 4JJ1 |
| Condition: | 100% Brand New |
| Material: | High-strength aluminum alloy & precision bearings |
If your brake master cylinder is failing, you may experience one or more of the following symptoms:
- Soft or Spongy Brake Pedal: Pedal feels unusually soft or slowly sinks to the floor
- Sinking Pedal at Traffic Lights: Brake pedal continues to sink while held at a stop
- Increased Stopping Distance: Vehicle takes longer to stop than normal
- Brake Warning Light: Dashboard warning light illuminates with low fluid level
- Fluid Leakage: Brake fluid seeping from the cylinder body
| Brand | Model | Chassis / Series | Engine | Notes |
|---|---|---|---|---|
| ISUZU | NLR | N-Series | 4JJ1 3.0L Diesel | NLR85 models |
| ISUZU | NMR | N-Series | 4JJ1 3.0L Diesel | NMR71 models |
| ISUZU | NPR-PRO | N-Series | 4JJ1 3.0L Diesel | Compatible |
| Feature | Benefit + Verification Signal |
|---|---|
| OEM Specification — ISUZU Genuine Equivalent | Guarantees factory-fit quality and performance — verified by OEM part numbers |
| Precision 1-1/8″ (28.57mm) Bore | Delivers consistent hydraulic pressure for reliable braking performance |
| High-Grade Aluminium Construction | Provides exceptional corrosion resistance and heat dissipation |
| Direct Bolt-On Fitment | No modifications required — engineered as a direct match |
| 100% Pressure Tested | Guarantees dependable operation and leak-free performance |
| 100% New — No Core Charge | Guarantees zero wear, immediate braking performance, and full service life |
| QC Item | Verification Method |
|---|---|
| Dimensional Accuracy | Precision inspection to verify 1-1/8″ bore diameter and mounting specifications |
| Material Composition | Aluminium analysis to verify corrosion resistance and structural integrity |
| Bore Surface Test | 100% surface testing to ensure optimum sealing surface |
| Leakage Test | 100% hydraulic pressure test to guarantee zero fluid leakage |
| Rubber Component Test | EPDM material verification for heat and brake fluid resistance |
| Durability Cycle Test | 500+ hour fatigue testing to verify 200,000+ km service life |
Pre-Installation Checklist:
- Bench bleed the new master cylinder before installation
- Always use fresh DOT 3 or DOT 4 brake fluid
- Inspect brake lines and connections for damage or corrosion
- Verify pushrod length matches the original cylinder
Installation Guidelines:
- Disconnect the negative battery terminal
- Siphon old brake fluid from the reservoir
- Disconnect brake lines from the master cylinder
- Remove mounting nuts securing the master cylinder
- Remove the old master cylinder assembly
- Clean the booster mounting surface thoroughly
- CRITICAL: Bench bleed the new master cylinder
- Install the new master cylinder onto the booster
- Torque mounting nuts to manufacturer's specifications
- Reconnect brake lines and torque to specification
- Refill reservoir with fresh DOT 3 or DOT 4 brake fluid
- CRITICAL: Bleed the entire brake system in correct sequence
- Test brake pedal feel and check for leaks before road test
Maintenance Schedule:
- Inspection: Every 50,000 km / 12 months
- Fluid Replacement: Every 2 years or 40,000 km
- Replacement: Immediately if failure symptoms appear
| Packaging: | Plastic bag and standard export carton |
| MOQ: | Small quantity accepted; quantity discounts available |
| Payment Terms: | T/T, Western Union, PayPal, |
| Delivery Time: | 45-60 days |
| Shipping Ports: | NINGBO, SHANGHAI |
| Export Markets: | Asia, Middle East, Africa, North America, Europe |
Suitable for: Wholesale distributors, truck parts retailers, commercial vehicle repair shops, and fleet owners.
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