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Angled view of a round black knurled coolant pump key showing square recessed 3/8" drive and printed marking 'ASTA A-PC38'.Side/angled view of black pump key showing four engagement tabs around a central square 3/8" drive recess and knurled edge.Top view of round black pump key showing four tabs around a central square socket and knurled rim.

3/8-Inch Drive Coolant Pump Key for VAG Engines

Specialized coolant pump thermostat removal and installation tool for Audi, VW, and Skoda 2013+ models with TSI/TFSI engines.

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Description

3/8-Inch Drive Coolant Pump Key for VAG Engines

Overview

This is a precision-engineered coolant pump key designed specifically for removing and installing coolant pump thermostats on VAG Group vehicles (Audi, Volkswagen, Skoda, SEAT). The tool features a robust metal construction with a knurled grip surface and four engagement lugs that lock directly into the pump's internal geometry. If your shop services modern TSI/TFSI petrol or TDI diesel engines, this tool eliminates improvisation and reduces the risk of stripped fittings.

Key Features

  • 3/8-inch drive socket connection – Integrates seamlessly with your existing ratchet and socket system
  • Four precision-cast engagement lugs – Prevents cam-out and ensures positive grip on the pump's internal features
  • Knurled circumference – Improves hand grip and control during installation/removal operations
  • Black coated metal body – Corrosion-resistant finish suitable for coolant environments
  • OEM-referenced design – Matches VW OEM specification T10508 for guaranteed fitment

Business Advantages for Resellers

Market Position: This is a specialist tool with a defined application universe—shops servicing VAG Group vehicles need this when thermostat replacement is on the agenda. Stock it as a mandatory accessory for Audi A3, Golf, Octavia, and Leon maintenance kits targeting the 2013+ model years.

Bulk Order Appeal: Technicians who recognize the need buy it once and keep it in the toolbox. Offer it as a package add-on during engine service tool promotions to increase average transaction value.

Inventory Turnover: Low SKU footprint, high relevance for VAG-focused shops—expect consistent, predictable demand from professional service centers.

Technical Specifications

Attribute Detail
Drive Size 3/8 inch
Tool Type Coolant Pump Thermostat Key
Engagement Method Four rectangular lugs + central square drive recess
Material Coated metal (black finish)
OEM Reference VW T10508
Compatibility Audi A3, VW Golf, Skoda Octavia, SEAT Leon (2013+)
Compatible Engines 1.2L TSI, 1.4L TFSI, 1.4L FSI, 1.0L TFSI 4V 3-cyl petrol; 1.4L TDI CR 3-cyl diesel

Application Context

This tool is a single-purpose specialist device—not a general-duty socket. It addresses a specific maintenance point: coolant pump thermostat cartridge removal and reinstallation on VAG engines. For shops servicing these platforms regularly, it's an essential time-saver. For general-purpose shops, it's a targeted acquisition aligned with the vehicle models in your service pipeline.

Recommendation: Position this in your VAG-specific tool bundles or as a standalone add-on for technicians working on post-2013 TSI/TFSI engine services.