Without Bolts clutch master cylinder for Toyota XUI3554A-2

CM246

Parameter Item	Specifications
Product Model	XUI3554A-2 (Without Bolts)
OE Number	31410-22140 / 31410-22141 / 31410-22142 / 31410-22240 / 31410-24011 / 31410-24012 / 31410-35180 / 31410-35181
Cross Reference Part Number	DORMAN: CM39819
Cylinder Bore (DIA)	15.87 mm
Mounting Size	Φ26.7 / 72 / 45° / 2-Φ9
Connecting Size	M10 × 1.0
Includes Mounting Bolts	No, requires additional bolts or OEM bolts
Applicable Transmission Types	Manual Transmission
Applicable vehicle years	1979 – 1992
Number of models covered	9 (6 sedans + 3 pickup trucks/SUVs)
Primary target markets	North America, Southeast Asia, Africa, Latin America

The clutch master cylinder is the core hydraulic component of the clutch system in a manual transmission vehicle. Its working principle is simple: Depress the clutch pedal → the master cylinder converts the pedal force into hydraulic pressure → the pressure pushes the driven cylinder through the oil pipe → the clutch disc disengages → gear shifting is completed.

Common symptoms of a worn-out master cylinder or seal failure include: a soft, unrestricted clutch pedal, difficulty shifting gears or getting into gear, and fluid leakage near the pedal. This is one of the most common repair issues in manual transmission vehicles.

Applicable Models (Application) This product covers multiple classic Toyota platforms, specifically the following models:
• 1987–1992 TOYOTA CARINA II (T17)
• 1987–1992 TOYOTA CARINA II Estate (T17)
• 1987–1992 TOYOTA CARINA II Saloon (T17)
• 1979–1985 TOYOTA COROLLA (E7)
• 1983–1989 TOYOTA COROLLA (E8)
• 1982–1989 TOYOTA COROLLA Liftback (E8)
• 1982–1989 TOYOTA HILUX IV Pickup (N5, N6)
• 1988–1989 Toyota 4Runner
• 1981–1989 Toyota Pickup

Market Background: The Corolla (E7, E8) is one of Toyota's best-selling vehicle series in history. The Hilux Pickup and Toyota Pickup/4Runner have large inventories in North America, Southeast Asia, Africa, and Latin America. These models were produced primarily between 1979 and 1992, and are generally over 30 years old. Some models (such as the Corolla E7/E8 and Hilux IV) are still in daily use in developing markets. As a high-frequency wear part, the clutch master cylinder has a continuous and widespread replacement demand.

Core Functions
• Hydraulic Pressure Conversion: Linearly converts pedal force into hydraulic output, ensuring precise clutch engagement and disengagement, and adapting to the pedal travel settings of various vehicle models.
• Sealed Hydraulic Circuit: Built-in high-precision sealing components prevent brake fluid leakage and maintain stable line pressure over the long term.
• Original Bore Match: The 15.87mm cylinder bore matches the original vehicle calibration, covering two different load conditions: passenger cars (Carina, Corolla) and pickup trucks/SUVs (Hilux, Pickup, 4Runner).
• 45° Flange Mounting Design: The mounting flange adopts a 45° bevel structure (Φ26.7/72/45°), perfectly matching the original vehicle's installation space layout for precise positioning.
• Multi-Part Number Compatibility: A single product corresponds to 8 Toyota original part numbers and DORMAN CM39819, providing broad coverage and facilitating parts suppliers to check parts codes for multiple vehicles.
• Structural Note – Please Note the Buffer Seat: Whether this product comes with a buffer seat may vary slightly depending on the vehicle model and era. Please check the old part's structure or contact us for confirmation before installation to avoid incorrect installation.

Notes: This product is a "boltless" version, and the structure of the master cylinder with a "buffer seat" varies slightly depending on the vehicle year. Please check the original parts or provide vehicle year information before ordering to avoid bolt or buffer seat mismatch during installation. For a bolted version, please contact sales to confirm availability.

What problems can this product solve for your customers?

Private Label/OBM Customers
Supports OEM/ODM labeling; packaging and labeling are customized to brand requirements. Corolla, Hilux, and 4Runner are all globally renowned Toyota models; private label products can leverage the market recognition of these models to quickly expand sales.
Covering 9 car models and 8 original equipment manufacturer (OE) part numbers, this is a high-efficiency category within our own-brand parts line, characterized by "low investment and broad coverage."
Provides complete technical documentation (OE part number list, parameter table, ISO certification documents) to help you quickly complete platform listing and qualification verification.

Wholesale Distributor
One product covers 9 car models: Carina II, Corolla (two generations), Hilux IV Pickup, 4Runner, and Toyota Pickup, significantly simplifying SKU management.
DORMAN CM39819 is a widely recognized cross-part number in the North American market, making it easy for your customers to match and verify in the system, reducing communication costs.
These car models are generally over 30 years old and still widely used in developing markets, making this a "classic best-selling part" category suitable for long-term stable operations.
Full inspection before leaving the factory ensures that sealing performance and dimensional accuracy meet OE requirements, effectively controlling your after-sales return and exchange rate.

Cost Optimization for Customers
Consistent with original equipment manufacturer (OEM) specifications, offering more competitive pricing and helping you increase profit margins while ensuring compatibility.
ISO 9001 quality management system certification, providing verifiable quality assurance to downstream customers.
The "Bolt-Free" version reduces unit costs, suitable for customers using recycled bolts from original vehicles or those who need to source their own standard parts. Purchasing on demand reduces waste.

Q1: What does "Without Bolts" mean? Do I need to buy bolts separately?
A: "Without Bolts" means this product does not include mounting bolts at the factory. In most cases, original bolts removed from old parts can be used, provided they are in good condition. If the old bolts are damaged or lost, 2-Φ9 bolts will need to be purchased separately. Please contact us for selection advice.

Q2: Do the 8 OE part numbers correspond to the same product?
A: Yes. The eight part numbers 31410-22140, -22141, -22142, -22240, -24011, -24012, -35180, and -35181 all point to the same mounting structure and hydraulic specifications across different model years and regional versions. XUI3554A-2 can cover all of these. Before ordering, it is recommended to check with your old part or the VIN code to avoid confusion with versions that have different buffer seat structures.

Q3: What is a "buffer seat"? Why is it important to pay attention to it?
A: Some model years have a buffer seat at the end of the master cylinder piston to cushion the impact force when the pedal returns to its original position; other model years do not have this structure. The two structures look similar but have slight internal differences. Buying the wrong one may affect the pedal rebound feel. It is recommended to check with your old part before ordering to confirm whether it has a buffer seat, or contact us with photos for assistance.