Thermostat Assembly for Volvo 6M5G9K478AB

Product Overview

Thermostat Assembly for Volvo 6M5G9K478AB is a direct-reference replacement for the coolant control circuit of Volvo vehicles. It is listed here against OEM 6M5G9K478AB, 6M5G9K478AA, 30650753 and 31319606, so the part can be matched to a vehicle without guesswork. In service the part carries the wax element, housing, seals and — on mapped units — the heater and temperature sensor that govern warm-up. When it fails it usually shows seals that take a set after repeated heat cycles and cracked plastic housings, and the driver sees a gauge that never settles in the normal band, higher fuel consumption and thermostat fault codes. 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

• One reference set on every document — OEM 6M5G9K478AB, 6M5G9K478AA, 30650753 and 31319606 appears on the quotation, the packing list and the carton label, so a warehouse can check a delivery without opening the box.
• 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.
• Tooling route for obsolete references — Where the reference is out of production, we develop the mould from the sample you supply rather than turning the enquiry away.
• Checked on the features that matter — Inspection concentrates on the opening temperature, the housing outline and whether the unit is map-controlled — the dimensions that put a part back in the box if they are wrong.

Application Scenarios

Rebuild of an obsolete platform

The original reference is no longer produced, so the part is made from a supplied sample. This reference, 6M5G9K478AB, is bought for exactly that situation on Volvo 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 6M5G9K478AB with the quantity and letting the packing follow.

Scheduled cooling-system overhaul

The vehicle is in for a coolant leak and the workshop replaces the whole branch at once rather than chasing the next failure in a month. With 6M5G9K478AB on the list the rest of the coolant control circuit can be priced at the same time.

Who It Is For

• 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 6M5G9K478AB 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. 6M5G9K478AB earns its shelf space through repeat demand on Volvo platforms.
• Fleet and bus operators — running Volvo vehicles past warranty and buying cooling-system parts by the box to keep downtime short. They order 6M5G9K478AB by the carton and reorder against the same number.

Problems It Solves

Reference mismatch

Visually identical parts carry different connector geometry between model years. Quoting OEM 6M5G9K478AB, 6M5G9K478AA, 30650753 and 31319606 fixes the identity before money moves. With 6M5G9K478AB 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 6M5G9K478AB that is settled before the quotation goes out.

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 thermostat housing assembly the answer is the reference, 6M5G9K478AB, on every document.

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 90°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 6M5G9K478AB, 6M5G9K478AA, 30650753 and 31319606 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 6M5G9K478AB 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.