Coolant Thermostat Housing Assembly for Volvo 30757408

Product Overview

Coolant Thermostat Housing Assembly for Volvo 30757408 is a direct-reference replacement for the coolant control circuit of Volvo vehicles. It is listed here against OEM 30757408, 30731313, 31251245, 31293611 and 30711785, so the part can be matched to a vehicle without guesswork. This part carries the wax element, housing, seals and — on mapped units — the heater and temperature sensor that govern warm-up. The failure modes that bring it across a parts counter are leaking sensor bosses and elements that stick part open, reported as a gauge that never settles in the normal band, higher fuel consumption and thermostat fault codes. We hold it as part of a cooling-system range of more than 4000 types built for the independent aftermarket in Europe, the Middle East and South America.

Key Benefits

• Matched to how the part actually fails — Leaking sensor bosses and elements that stick part open are the reasons this reference is bought, so those are the features checked before packing.
• 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.
• Ordered by reference not by photo — The listing carries OEM 30757408, 30731313, 31251245, 31293611 and 30711785. 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. With 30757408 on the list the rest of the coolant control circuit can be priced at the same time.

Counter stock for a busy platform

Volvo volume in the region justifies holding the line on the shelf instead of ordering it in per job. For 30757408 the practical step is confirming the opening temperature, the housing outline and whether the unit is map-controlled before the order is placed.

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. Here the thermostat housing assembly is ordered against 30757408 and travels with the rest of the Volvo branch.

Who It Is For

• Aftermarket distributors — stocking cooling-system lines for Volvo across a regional network and needing a reference-accurate catalogue behind the shelf. What they need from 30757408 is that it fits the Volvo on the ramp today.
• Workshop and fast-fit chains — replacing thermostat housing assemblys on Volvo daily and judging a supplier on whether the part fits first time. What they need from 30757408 is that it fits the Volvo on the ramp today.
• Online parts sellers — listing by OEM reference, where a mismatched number turns into a return and a negative rating. They order 30757408 by the carton and reorder against the same number.

Problems It Solves

Unclear compound

Confirm the compound against the reference before ordering, because visually identical parts are moulded in different materials. For Volvo buyers it is the difference between a stocked line and a credit note on 30757408.

Reference mismatch

Visually identical parts carry different connector geometry between model years. Quoting OEM 30757408, 30731313, 31251245, 31293611 and 30711785 fixes the identity before money moves. With 30757408 the check is the opening temperature, the housing outline and whether the unit is map-controlled, and it happens before despatch.

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 30757408 that is settled before the quotation goes out.

Technical Features

The part serves the coolant control circuit and carries the wax element, housing, seals and — on mapped units — the heater and temperature sensor that govern warm-up. Material for this reference is confirmed per enquiry. The listed opening temperature is 89°C, which is the figure that has to match the vehicle.

Matched to the circuit the part serves. Confirm the compound against the reference before ordering, because visually identical parts are moulded in different materials.

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 30757408, 30731313, 31251245, 31293611 and 30711785 against the number on the part you removed. Do not match on outline alone.

2. Check the interfaces

   Compare the opening temperature, the housing outline and whether the unit is map-controlled before the vehicle is stripped further.

3. Inspect on arrival

   Look for transit damage on sealing faces and connectors. Confirm the compound against the reference before ordering, because visually identical parts are moulded in different materials.

4. Fit with the original clamp style

   Reuse the clamp type the Volvo platform was designed around, and fit any seal or O-ring supplied with 30757408 rather than carrying the old one over.

5. Pressure check before handover

   Refill, bleed the circuit and check for cracked plastic housings at working temperature before the vehicle leaves.