Coolant Water Flange Pipe for BMW OEM 11531708808

Product Overview

Coolant Water Flange Pipe for BMW OEM 11531708808 covers the coolant distribution point on BMW applications. The reference set on file is OEM 11531708808, which is the figure to quote when you send an enquiry. This part joins several coolant lines at the cylinder head and usually carries the temperature sensor and its seals. The failure modes that bring it across a parts counter are hairline cracks in the moulding and warped mating faces, reported as a coolant drip at the head, low coolant warnings and an intermittent temperature signal. It sits inside a cooling-system programme of more than 4000 types, so the same order can carry the neighbouring hoses, flanges and thermostat housings for the platform.

Key Benefits

• Sample-based production for parts not yet listed — Send the old part or a drawing and we quote from the sample, including mould development where no tool exists.
• Checked on the features that matter — Inspection concentrates on the port count, the bolt pattern and whether the sensor and seals are included — the dimensions that put a part back in the box if they are wrong.
• Built for the duty of the coolant distribution point — The part joins several coolant lines at the cylinder head and usually carries the temperature sensor and its seals, so the compound and the wall construction are matched to that circuit rather than to a generic hose spec.
• Aftermarket buyers, not one-off retail — Pricing and packing are set up for distributors and workshop chains buying by the carton, not for single-piece retail.

Application Scenarios

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. This reference, 11531708808, is bought for exactly that situation on BMW vehicles.

Rebuild of an obsolete platform

The original reference is no longer produced, so the part is made from a supplied sample. This reference, 11531708808, is bought for exactly that situation on BMW vehicles.

Mixed container for a distributor

A quarterly container is filled across families — intake, charge air, coolant and thermostat lines — to a single packing list. On this reference that means quoting 11531708808 with the quantity and letting the packing follow.

Who It Is For

• Workshop and fast-fit chains — replacing water flanges on BMW daily and judging a supplier on whether the part fits first time. 11531708808 earns its shelf space through repeat demand on BMW platforms.
• Online parts sellers — listing by OEM reference, where a mismatched number turns into a return and a negative rating. They order 11531708808 by the carton and reorder against the same number.
• Fleet and bus operators — running BMW vehicles past warranty and buying cooling-system parts by the box to keep downtime short. They judge 11531708808 on one thing: whether it matches the part that came off.

Problems It Solves

Unclear compound

PA66 mouldings crack rather than weep, so a hairline split can empty a coolant system quickly once it opens. With 11531708808 the check is the port count, the bolt pattern and whether the sensor and seals are included, and it happens before despatch.

Reference mismatch

Visually identical parts carry different connector geometry between model years. Quoting OEM 11531708808 fixes the identity before money moves. That is why 11531708808 carries its full cross-reference set on this page.

Split ordering

Sourcing one hose from one supplier and the matching flange from another doubles the freight and the paperwork for the same repair. On 11531708808 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 11531708808 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 11531708808 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.