Compact clutch master cylinder for TOYOTA XUI3802L

CM246

Parameter Item	Specification Value	Remarks
Product Model	XUI3802L	Toyota Small Car Platform Dedicated
Inner Diameter (DIA)	15.87mm (5/8 inch)	Standard Toyota small car specification
Installation Dimensions	Φ29 / 60 / 75° / 2-M8×1.25	Double bolt fixing, hole diameter Φ29mm, installation angle 75°
Connection Thread	M10 × 1.0	Standard hydraulic line connection specification
Main Body Material	Aluminum alloy	Lightweight design, anodized surface treatment
Piston Material	Aluminum alloy + EPDM rubber seals	Main cup + auxiliary cup double seal, temperature resistance -40℃~260℃
Applicable Models	Toyota Echo/Yaris/Yaris Verso/RAV4 I (1994–2005)	—
Compatible Engines	1SZ-FE / 2NZ-FE / 1NZ-FE / 3S-FE 1.0L–2.0L inline four/three-cylinder gasoline engine	—

This master pump was designed specifically for Toyota Echo, Yaris, Yaris Verso, and RAV4 models produced between 1994 and 2005. It features an aluminum alloy body and an inner diameter of 5/8 inches (15.87mm), a standard specification for Toyota's small car platform. Compared to traditional cast iron, the aluminum alloy body is lighter, saving space in the compact engine compartment while reducing overall vehicle weight and fuel consumption.

Specific Applications
Compatible Models
Toyota Echo Saloon (P1) — 1999-2005 model year, entry-level sedan for North American and Australian markets, equipped with a 1.5L 1NZ-FE engine, chassis code NCP12, manual transmission only.
Toyota Yaris (P1) — 1999-2005 model year, classic small hatchback for European and Japanese markets (called Vitz in Japan), equipped with 1.0L/1.3L/1.5L gasoline engines, chassis codes SCP10/NCP10/NCP13, core model of the first-generation Yaris platform.
Toyota Yaris Verso (P2) — 1999-2005 model year, multi-purpose small MPV for the European market (called Fun Cargo in Japan), equipped with 1.3L/1.5L gasoline engines, chassis codes NCP20/NCP22, a family car with high space utilization.
Toyota RAV4 I (A1) — 1994-2000 model year: First-generation compact SUV, equipped with a 2.0L 3S-FE gasoline engine, chassis code SXA10/SXA11, Toyota's first urban SUV with a manual transmission.

Toyota Yaris Verso Van (P2) — 2000-2005 model year: Commercial van version, sharing the clutch hydraulic system with the Yaris Verso, targeting the European small commercial market.

Core Functions: The clutch master cylinder is the starting control unit of the hydraulic clutch system in manual transmission vehicles. The core functions of the XUI3802L include:
Hydraulic pressure generation: Converting the mechanical force of the driver's pedal into hydraulic oil pressure, which is transmitted to the clutch slave cylinder through pipelines to achieve clutch disengagement.
Precise stroke control: A standard 15.87mm inner diameter design ensures a linear correspondence between pedal travel and clutch disengagement travel, resulting in smooth shifting.
Sealing and pressure maintenance: Built-in double sealing structure with main and auxiliary piston cups, using EPDM... Rubber material prevents hydraulic oil leakage and maintains system pressure stability.
Lightweight design: The aluminum alloy body is approximately 30% lighter than cast iron, reducing overall vehicle weight and improving fuel economy.
Corrosion-resistant treatment: Surface anodized treatment resists high temperatures, humidity, and salt corrosion in the engine compartment.
Buffer seat design: Note whether the connector is equipped with a buffer seat; this design directly affects installation compatibility and pipe connection sealing.

OE NO (Original Part Number)
OE Number Applicable Instructions
31410-42010 Toyota Original Standard Part Number, RAV4/Echo/Yaris Universal Replacement
31420-42010 Toyota Original Part Number, Yaris/Echo Dedicated Version
31420-42020 Toyota Original Part Number, RAV4/Yaris Later Version Replacement Number
31420-52010 Toyota Original Part Number, Yaris Verso Dedicated Version
31420-52030 Toyota Original Part Number, Yaris Commercial Version Verso Van

DORMAN: CM350096 North American market Dorman brand cross-number, compatible with Toyota RAV4 1996-2005
Important Note: When purchasing, please confirm whether the connector includes a buffer seat. Different OE numbers may have differences in buffer seat design, directly affecting installation compatibility. It is recommended to verify the used part on the actual vehicle or provide the VIN code for confirmation before placing an order.

What problems can this product solve for overseas customers?
Original parts discontinued or with lead times of 3-6 months: In-stock/near-in-stock supply, lead time 45-50 days, safety stock plan supported.
Aftermarket parts quality varies, frequent leaks and seals: ISO9001/TS16949 quality system control, 100% sealing test before shipment, EPDM seals temperature resistance -40℃~260℃.
Aluminum alloy versions lack strength, prone to deformation during installation: ZL111 aluminum alloy material, hardness higher than 110HB, CNC precision machining ensures thread accuracy.
Different OE numbers correspond to different buffer seats, high return rate for incorrect purchases: Provides detailed numbering tables and buffer seat confirmation guidelines, supports sample customization.
Small batch trial orders, supplier non-cooperation, minimum order of 100 pieces supported: Logo/packaging customization, lowering the entry barrier for new customers.
Target markets (Europe/North America) are price-sensitive: Tiered pricing system, bulk purchases can lock in annual prices to resist exchange rate fluctuations.
Difficulty finding suitable parts for classic car model restoration projects: Comprehensive coverage. 1994-2005 Toyota Small Car Platform, One-Stop Procurement for Repair Projects

Q1: What is the difference between XUI3802L and XUI3554A-2 (boltless version)?
A: While their compatible models and OE numbers overlap, their mounting structures differ. XUI3802L uses double-bolt M8×1.25 mounting (Φ29/60/75°) and is suitable for Toyota Echo/Yaris/RAV4 I; XUI3554A-2 is a boltless flange mount and is suitable for Toyota Carina II T17 series. Please confirm the version based on the actual vehicle's mounting hole positions and the old part's structure.

Q2: How can I determine whether my vehicle requires the version with or without a buffer seat?
A: The buffer seat is located at the hydraulic line connection end and is used to absorb line vibration and enhance sealing. Please remove the old part and take photos to confirm whether the connector has a rubber/plastic buffer pad structure, or provide the vehicle's VIN code and the old part's OE number, and we will assist in verification.

Q3: Is this master cylinder compatible with right-hand drive (RHD) and left-hand drive (LHD) vehicles?
A: The clutch master cylinder is a universal component for hydraulic systems and does not distinguish between left and right drive. It can be installed as long as the vehicle model and OE number match. Both RHD and LHD versions of Toyota Echo/Yaris/RAV4 are compatible.