
Cooling System Parts Catalogued by Reference
Six product groups covering the wet side and the air side of the engine. Every listing carries the OEM numbers it replaces, because that is the only field a buyer can check before the part is fitted.
Parts Buyers Ask For Most
A sample of the published catalogue across intake, charge air, coolant and thermostat families.
















Built for Buyers Who Pay Twice for a Wrong Part
Aftermarket Distribution
Regional distributors holding cooling-system lines across a branch network.
Workshops and Fast-Fit Chains
Repair businesses that judge a supplier on first-time fit, not on the catalogue cover.
Fleet and Bus Operators
Operators running vehicles past warranty who buy cooling parts by the carton.
Online Parts Retail
Sellers who list by OEM reference and pay for every mismatch twice.
The Four Problems Behind Most Cooling System Enquiries
The reference does not match the picture
Model-year changes move connector geometry while the outline stays the same. Ordering against the OEM number instead of a photograph removes the argument.
The line is split across three suppliers
Hose here, flange there, thermostat somewhere else. One cooling-system range covering more than 4000 types puts the platform on one packing list.
The reference has gone out of production
The vehicle has not. Send the sample and we quote from it, including mould development where no tooling exists.
The part arrives crushed or wrongly labelled
Cartons are marked with the reference and packed for a sea leg, so a warehouse can check a delivery without cutting every box open.
How the Range Is Bought
OEM Cross-Reference Sourcing
Turning a list of OEM numbers into a priced, packed and shippable order.
Sample-Based Production and Mould Development
Getting an obsolete or unlisted reference back into production from the part you hold.
Mixed Container Consolidation
Filling one shipment across hose, flange and thermostat families to a single packing list.
Packing and Labelling for Your Shelf
Carton marking and packing built around how the part is picked at your end.
Typical Enquiries and How They Are Handled
These are illustrative scenarios written from the shape of everyday enquiries. They do not name customers and they do not carry performance figures we cannot evidence.
Consolidating a BMW Cooling Programme Into One Shipment
Illustrative sourcing scenario, not a named customer reference.
Mercedes-BenzKeeping Mercedes-Benz Intake Ducts on the Shelf
Illustrative sourcing scenario, not a named customer reference.
RenaultRenault Turbo Hose Replacement for a Van Fleet
Illustrative sourcing scenario, not a named customer reference.
VolvoBringing an Obsolete Thermostat Housing Back Into Production
Illustrative sourcing scenario, not a named customer reference.
Questions Buyers Ask Before the First Order
What does Hunan Woojin Autoparts actually supply
Engine cooling system parts for passenger cars and light commercials: air intake hoses, turbo and intercooler hoses, coolant and radiator hoses, thermostat housing assemblies and water flanges. The range covers German, French, Japanese, American and Korean vehicles and runs to more than 4000 types, of which 178 references are published on this site.
How do I order a part that is not on the website
Send the OEM reference, or the old part or a drawing. We quote from the sample and develop the mould where the tooling no longer exists, so an obsolete reference does not end the conversation.
Which markets do you already ship to
Europe, the Middle East and South America are the established markets for the range. Packing and carton marking are set up for sea freight rather than for domestic distribution.
Do you sell single pieces
The range is set up for distributors, workshop chains and exporters buying by the carton. Minimum quantities are confirmed per reference when you ask for a quotation.
How are parts matched to a vehicle
By OEM reference. Every product page lists the numbers the part replaces plus our internal reference, so a buyer can confirm identity before the order is placed rather than after the box is opened.
Can you put our own carton marking on the boxes
Carton marking and packing are agreed per order. Tell us how the part is picked at your end and the cartons are labelled to match.
What certifications are available
Certification documents are not published on this site. Ask by email for the documentation that applies to your market and the references you are buying.
Send Your Reference List and Get It Priced
Email the OEM numbers and quantities you need. You get a written quotation with packing details and carton counts.







