
Product Introduction
The 5025000149 Expansion Tank is an important cooling system component used in Mercedes-Benz NG, SK series and Beiben NG80 trucks. It is connected with the radiator and cooling circuit to store additional coolant, compensate for coolant volume changes, and ensure stable engine temperature during vehicle operation.
Manufactured according to OEM specifications, this expansion tank features durable plastic construction, accurate mounting dimensions, and reliable sealing performance. It is designed to withstand high-temperature coolant environments, engine vibration, and long-term heavy-duty truck operation.

Technical Specifications
| Item | Specification |
| Product Name | Expansion Tank / Coolant Reservoir |
| OEM Part Number | 5025000149 |
| Vehicle Brand | Mercedes-Benz / Beiben |
| Compatible Models | NG / SK / NG80 |
| System | Engine Cooling System |
| Component Type | Coolant Storage Tank |
| Position | Radiator Cooling Circuit |
| Material | High-Strength Engineering Plastic |
| Manufacturing Process | Injection Molding |
| Function | Stores Coolant and Balances Cooling Pressure |
| Working Medium | Engine Coolant / Antifreeze |
| Features | Heat Resistant, Pressure Resistant, Leak Proof |
| Condition | Brand New |
| OEM Standard | Yes |
| Quality Test | Leakage Test / Pressure Test / Dimension Inspection |
| Installation | OEM Direct Replacement |
| Packaging | Export Standard Packaging |
| Origin | China |
Vehicle Fitment
| Vehicle Brand | Compatible Models |
| Mercedes-Benz | NG Series |
| Mercedes-Benz | SK Series |
| Beiben | NG80 |
Payment & Shipping
| Category | Options |
| Payment Methods | T/T, PayPal, Western Union, MoneyGram, L/C, Alibaba Trade Assurance |
| Shipping Methods | DHL, FedEx, UPS, TNT |
| Delivery Time | 3–7 Days (Express), 20–45 Days (Sea Freight) |
| Trade Terms | EXW, FOB, CIF, CFR, DDP |
| Shipping Scope | Worldwide Shipping |
Related Products Categories
| Section/System | Common Spare Parts |
| Cylinder Block & Cylinder Head | Cylinder Block, Cylinder Head, Cylinder Liner, Piston, Piston Ring, Cylinder Head Gasket |
| Crankshaft System | Crankshaft, Connecting Rod, Bearing, Thrust Washer |
| Valve Train | Intake Valve, Exhaust Valve, Camshaft, Rocker Arm, Valve Spring |
| Fuel System | Injector, Fuel Pump, Fuel Filter |
| Cooling System | Water Pump, Thermostat, Radiator |
| Lubrication System | Oil Pump, Oil Cooler |
Transmission & Drivetrain Parts
| Section/System | Common Spare Parts |
| Clutch System | Clutch Disc, Pressure Plate, Release Bearing, Clutch Master Cylinder, Clutch Booster Cylinder |
| Gearbox System | Gearbox Assembly, Gear Set, Bearing, Seal |
| Differential System | Differential Assembly, Crown Wheel & Pinion, Differential Bearing |
| Driveshaft System | Propeller Shaft, Universal Joint, Drive Shaft Center Bearing, Flange Fork, Slip Yoke, Center Support |
| Axle System | Axle Shaft, Wheel Hub, Planetary Gear, Side Gear |
| Section/System | Common Spare Parts |
| Front Axle | Steering Knuckle, Kingpin Kit, Tie Rod, Wheel Hub |
| Rear Axle | Axle Housing, Hub, Differential Housing |
| Suspension System | Leaf Spring, Leaf Spring Bracket, Leaf Spring Seat, Torque Rod, Balance Shaft, Spring Shackle, Suspension Saddle, Console Bracket, Shock Absorber, U-bolt |
| Steering System | Steering Gearbox, Drag Link, Steering Pump |
| Brake System | Brake Drum, Brake Shoe, Brake Chamber, Brake Valve, Slack Adjuster, Air Hose |
Cabin & Body Parts
| Section/System | Common Spare Parts |
| Cabin Assembly | Cabin Body, Mounting, Door Lock, Door Handle, Door Hinge |
| Electrical System | Relay, Signal Lamp, Combination Instrument, Tachometer, Speedometer, Headlamp, Tail Lamp, Wiring Harness |
| Interior | Dashboard, Switch Panel, Instrument Cluster |
| Exterior | Bumper, Grille, Fender, Step |
