Boigevis Trading (guangzhou) Co., Ltd.
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- High-quality auxiliary water tank expansion tank 4G0 121 403G for FAW Audi A8/S8
- Product Details
- Company Details
Product Specification
|
|
|
|
| Point Of Origin |
Guangdong, China |
Delivery Time |
3-7days |
| Quality |
High quality |
Brand |
Boigevis |
| Payment Terms |
Western Union,T/T,D/P,D/A,L/C |
Warranty |
12 Months |
| Packaging Details |
Normal |
Item Name |
auxiliary water tank expansion tank |
| Shipping Way |
DHL UPS FEDEX EMS TNT |
OE NO. |
4G0 121 403G |
| Packing |
Boigevis packing |
Car Model |
for FAW Audi A8/S8 quattro |
| Size |
Standard size |
Model Number |
4G0 121 403G |
| Brand Name |
Boigevis |
Place of Origin |
China |
High-quality Coolant Expansion Tank 4G0 121 403G for FAW Audi A8 / S8 Quattro
This premium coolant auxiliary expansion tank with OE number 4G0 121 403G is a core thermal management component for FAW Audi A8 D4 / S8 Quattro equipped with EA837 3.0T mechanical supercharged V6 engine. It is a high-demand cooling system spare part widely stocked by professional VAG repair shops and cross-border auto parts wholesalers with stable long-term market demand.
Core Selling Points
High-failure cooling vulnerable part with continuous repeat bulk orders
Expansion tanks are common aging consumables for Audi A8 D4 platform vehicles. Original tanks suffer long-term high-temperature circulation, coolant corrosion and vibration, resulting in plastic shell cracking, internal liquid level sensor failure, pipeline interface leakage and liquid level marking blurring. Damaged tanks trigger coolant leakage, dashboard low coolant warning, engine overheating under heavy load, insufficient hot air output and abnormal coolant odor inside the engine compartment. Professional Audi repair garages and global export distributors place recurring bulk orders all year round, with stable inventory turnover and favorable profit margins for dealers.
100% OE precise fit, direct bolt-on installation without modification
Manufactured strictly following original OEM molding standards: overall tank outline, coolant inlet/outlet pipe calibers, cap mounting opening, liquid level sensor plug structure and fixing foot spacing fully match genuine OEM 4G0121403G. Cross interchangeable part codes: 4G0121403AC, 4G0121403D, 4G0121403AG. Built-in liquid level sensor and matching sealing ring as standard; no pipeline cutting or trimming required during replacement, perfectly fit the original vehicle cooling pipeline layout and mounting position, greatly cutting labor hours for cooling system maintenance and coolant replacement.
Compatible Vehicle Range
- Core matching model: FAW Audi A8 D4 / S8 Quattro (2011–2017) 3.0T EA837 supercharged engine
- Interchangeable VAG platform vehicles: Audi A6 C7, A7 C7, RS7, Q7 4M early models with identical cooling tank structure
Reinforced high-temperature coolant-resistant plastic structure
- High-density modified PP plastic tank body, strong UV and high temperature resistance, long-term engine bay working environment not easy to crack, deform or turn yellow
- Integrated precision liquid level sensor, stable signal transmission, no false low coolant fault codes triggered by ECU
- FKM fluorine rubber integrated sealing ring at each pipeline interface, resist ethanol mixed coolant, effectively prevent coolant seepage
- Standard MIN/MAX clear liquid level scale, convenient for daily coolant inspection
- Reinforced anti-vibration fixing lugs, firmly fixed to the vehicle frame without offset during bumpy driving
Stable cooling system pressure regulation to protect large-displacement turbo engine
Stores redundant thermal expansion coolant and balances internal pressure of the cooling circuit. Accelerate cold start small circulation to speed up cabin heating; timely supplement coolant for high-load climbing to avoid engine overheating; cooperate with pressure tank cap to maintain standard system pressure, prevent coolant boiling and vaporization damage to cylinder head and turbo components.
Fully resolve typical expansion tank failure faults
Perfectly fixes common EA837 cooling system malfunctions:
- Coolant liquid leakage around the tank body and pipeline joints
- Dashboard low coolant warning light stays on abnormally
- Engine temperature surges and overheating alarm under full-load driving
- Slow warm-up and insufficient hot air output in cold winter
- Visible hairline cracks, yellowing and brittle aging on original tank shell
- Coolant peculiar smell diffuses near the engine compartment
Rigorous multi-stage factory testing & sufficient spot stock
Every expansion tank undergoes coolant immersion aging test, pressure sealing leakage test, liquid level sensor calibration test and vibration anti-fracture test before delivery, compliant with IATF 16949 international automotive quality standards. Mass ready stock supports mixed one-stop bulk procurement with electronic water pumps, auxiliary water pumps, cooling hoses and A8 D4 cooling system overhaul kits. Custom neutral packaging and private label OEM services are available for domestic wholesale and cross-border regional buyers.
Company Details
Bronze Gleitlager
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Bronze Sleeve Bushings
and
Graphite Plugged Bushings
from Quality China Factory
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Business Type:
Manufacturer
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Total Annual:
10000000-50000000
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Employee Number:
150~200
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Ecer Certification：
Verified Supplier
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