Coolant Water Flange Pipe for BMW OEM 11531743200

Product Overview

This Water Flange is supplied for BMW applications and is catalogued against OEM 11531743200 and 11531743199. Matching starts from the reference rather than from a picture, which is what keeps a container of parts out of the returns pile. In service the part joins several coolant lines at the cylinder head and usually carries the temperature sensor and its seals. When it fails it usually shows stripped sensor threads and leaking O-ring grooves, and the driver sees a coolant drip at the head, low coolant warnings and an intermittent temperature signal. Hunan Woojin Autoparts supplies it from a cooling-system range of more than 4000 types covering German, French, Japanese, American and Korean vehicles.

Key Benefits

• Matched to how the part actually fails — Stripped sensor threads and leaking O-ring grooves are the reasons this reference is bought, so those are the features checked before packing.
• Export packing as standard — The range ships to Europe, the Middle East and South America, so cartons are packed for long sea legs rather than for a local van run.
• Ordered by reference not by photo — The listing carries OEM 11531743200 and 11531743199. You quote the number, we confirm against the same number, and the part that ships is the one on the invoice.
• Mixed pallets instead of single lines — A cooling-system range of more than 4000 types means a slow-moving line can travel with fast movers instead of being ordered on its own.

Application Scenarios

Warranty-expired fleet maintenance

A fleet past dealer coverage moves to independent supply and needs the same reference coverage at a working price. For 11531743200 the practical step is confirming the port count, the bolt pattern and whether the sensor and seals are included before the order is placed.

Counter stock for a busy platform

BMW volume in the region justifies holding the line on the shelf instead of ordering it in per job. Here the water flange is ordered against 11531743200 and travels with the rest of the BMW branch.

Breakdown repair

The vehicle is off the road and the part has to be right the first time, which makes the reference match the whole decision. With 11531743200 on the list the rest of the coolant distribution point can be priced at the same time.

Who It Is For

• Fleet and bus operators — running BMW vehicles past warranty and buying cooling-system parts by the box to keep downtime short. What they need from 11531743200 is that it fits the BMW on the ramp today.
• Radiator and cooling specialists — rebuilding cooling systems and sourcing the hoses, flanges and housings for a platform in one go. 11531743200 earns its shelf space through repeat demand on BMW platforms.
• Exporters and consolidators — shipping mixed cooling-system pallets into Europe, the Middle East and South America. 11531743200 earns its shelf space through repeat demand on BMW platforms.

Problems It Solves

Split ordering

Sourcing one hose from one supplier and the matching flange from another doubles the freight and the paperwork for the same repair. That is why 11531743200 carries its full cross-reference set on this page.

Parts that are no longer produced

When the original reference is dropped, the repair still exists. Sample-based production and mould development keep the line alive. For this water flange the answer is the reference, 11531743200, on every document.

Returns from wrong fitment

Every returned part costs the freight twice. Checking the port count, the bolt pattern and whether the sensor and seals are included before despatch is cheaper than a credit note. On 11531743200 that is settled before the quotation goes out.

Technical Features

The part serves the coolant distribution point and joins several coolant lines at the cylinder head and usually carries the temperature sensor and its seals. It is moulded in PA66 glass-filled nylon, chosen because glass-filled PA66 gives a rigid pipe that holds its shape against vibration and keeps clamp faces dimensionally stable at under-bonnet temperature.

Used where the part must hold a fixed geometry and carry bolted or clipped interfaces. PA66 mouldings crack rather than weep, so a hairline split can empty a coolant system quickly once it opens.

Specifications

Values marked TBC are not stated on the source catalogue. They are confirmed in writing on the quotation rather than estimated here.

Comparison With the Alternatives

Use Guide

1. Confirm the reference

   Match OEM 11531743200 and 11531743199 against the number on the part you removed. Do not match on outline alone.

2. Check the interfaces

   Compare the port count, the bolt pattern and whether the sensor and seals are included before the vehicle is stripped further.

3. Inspect on arrival

   Look for transit damage on sealing faces and connectors. PA66 mouldings crack rather than weep, so a hairline split can empty a coolant system quickly once it opens.

4. Fit with the original clamp style

   Reuse the clamp type the BMW platform was designed around, and fit any seal or O-ring supplied with 11531743200 rather than carrying the old one over.

5. Pressure check before handover

   Refill, bleed the circuit and check for hairline cracks in the moulding at working temperature before the vehicle leaves.