OEM Clutch Master Cylinder for Mazda T4100 (1981–1984) – OE W023-41-990 | XUI3517A

CM246

Parameter	Details
Xusen Part No.	XUI3517A
OE Reference No.	W023-41-990 / W001-41-990A
Cross Reference	CM246
Compatible Make	Mazda
Compatible Model	T4100 Light Commercial Truck
Vehicle Type	Light Commercial Truck (LCV)
Compatible Years	1981 – 1984
Transmission Type	Manual
Bore Diameter (DIA)	15.87 mm
Mounting Size	Φ30.5 / 65 / 2-Φ10.5
Connecting Size	M10 × 1.0
Seal Material	EPDM (DOT 3 / DOT 4 compatible)
Quality Standard	ISO 9001 / TS16949
Packaging	Neutral / OEM / Private Label (customizable)
MOQ	Contact us for wholesale MOQ

What Does This Part Do?
The clutch master cylinder is the hydraulic starting point of the clutch system. When the driver presses the clutch pedal, this cylinder converts that physical pressure into hydraulic fluid pressure, which then travels through the line to push the slave cylinder and disengage the clutch plate from the engine.
Without it, gear shifting becomes impossible or unsafe.
For a manual-transmission light truck like the Mazda T4100, this is a high-wear component — particularly in markets where these trucks are still working daily in agriculture, logistics, and small-scale cargo transport.

Why the Mazda T4100 Market Still Matters
The Mazda T4100 is a light commercial truck produced from the late 1970s through the mid-1980s.
Despite its age, a significant number of units remain in active use across Southeast Asia (particularly Thailand and the Philippines), parts of the Middle East, and East Africa — markets where durable, low-cost commercial vehicles have a long working life.
This means demand for hydraulic replacement parts like clutch master cylinders is real and ongoing, but supply from mainstream aftermarket channels is increasingly limited.
For importers and distributors serving these markets, sourcing a reliable, dimensionally accurate replacement is precisely the challenge — and the opportunity.

Why Distributors Source This from Xusen
Hard-to-find application, reliable source
Major European aftermarket brands rarely catalogue components for 1980s Japanese commercial trucks. Xusen maintains tooling and stock for these legacy applications precisely because the demand is real in specific regional markets.

Dimensionally verified fit
Bore diameter, mounting hole pattern, and fluid port thread spec are matched to original OE drawings. No shimming, no adaptation needed.

Two OE numbers covered
Both W023-41-990 and W001-41-990A are supported under one part number, simplifying your catalogue management.

Private label ready
If you supply under your own brand, we offer neutral or custom packaging with your logo, part number, and language requirements.

Q1: Does XUI3517A replace both OE numbers W023-41-990 and W001-41-990A?
Yes. XUI3517A is designed to replace both OE references. The two part numbers represent production revisions of the same application; this part covers both fitments with consistent bore and port dimensions.

Q2: The T4100 is an older model — how do you ensure the part still fits?
Our engineering team cross-references OE drawings and physical samples to verify bore diameter, mounting hole pattern, and fluid port thread spec before production.
The 15.87 mm bore and M10×1.0 connecting size are confirmed to factory specification.

Q3: In which markets is demand for T4100 parts strongest?
The Mazda T4100 remains in active use primarily in Thailand, the Philippines, parts of East Africa, and some Middle Eastern markets where older commercial vehicles continue in agricultural and light freight roles.
These markets represent steady aftermarket demand for hydraulic drivetrain components.