Clutch Master Cylinder for Chery Eastar & Fulwin 5 – XUI3813L

CM246

Vehicle Compatibility List

Vehicle Model	Production Years	OE Reference No.
Chery Eastar (B11)	2003–2010	B11-1602020
Chery Fulwin 5 (B11FL)	2011–2013	B11-1602020

Product Technical Specifications

Item	Specification Details
Model No.	XUI3813L
Bore Diameter	15.87 mm
Mounting Size	Φ33.9 / 74 / 2-Φ8.9
Connecting Size	M10 × 1.0
OE Cross Reference	B11-1602020 / CM246
Installation Type	Direct replacement
Packaging Option	Neutral box / OEM custom branding

Quality & Sourcing Standards

Standard Code	Definition & Meaning
ISO 9001	Ensures consistent dimensional tolerances and stable batch quality for all production batches
IATF 16949	Global automotive aftermarket recognized supply chain certification for international procurement
VDA6	German automotive audit standard, meets qualification requirements for European & CIS distributors

 

Clutch Master Cylinder for Chery B11 Platform — Eastar and Fulwin 5
The Chery B11 platform underpins two distinct model generations: the Eastar , Chery's mid-size sedan sold across China, the Middle East, and Latin America from 2003; and the Fulwin 5 (B11FL), a revised variant produced through 2013. Both share the same clutch hydraulic architecture and OE reference B11-1602020, making XUI3813L a single direct-fit solution for the entire B11 production range.
The master cylinder on B11 vehicles is firewall-mounted and directly linked to the clutch pedal assembly. As the first component in the hydraulic clutch circuit, it converts every pedal input into pressurized fluid movement — and is therefore the first component to show wear when fluid maintenance has been neglected or the vehicle has accumulated high mileage in stop-start urban conditions.
The B11 Eastar was positioned as Chery's flagship sedan during its production run, targeting buyers in emerging markets across the Middle East, CIS countries, and Latin America. In these regions, vehicles typically remain in service significantly longer than in Western markets — often exceeding 15 to 20 years of daily use. This extended service life, combined with frequent stop-start urban driving patterns and inconsistent hydraulic fluid replacement schedules, creates conditions where clutch master cylinder seal degradation is an expected maintenance event rather than an exceptional failure.

Typical failure signs on B11 Eastar and Fulwin 5:
Pedal gradually softens over weeks before total pressure loss — early internal bypass developing slowly
Clutch disengages inconsistently — gear engagement varies between attempts, especially when hot
Fluid level drops in reservoir with no visible external leak — seal failure consuming fluid internally
Pedal response changes noticeably between cold and hot operation — heat-sensitive seal degradation
Clutch drag under load after extended city driving — incomplete disengagement due to pressure loss

Identifying these symptoms at the soft-pedal or inconsistency stage — before total hydraulic failure — allows replacement to be performed as a planned maintenance event rather than a roadside breakdown. On B11 vehicles, delaying replacement risks damage to the release fork and slave cylinder, both of which can be affected by master cylinder delivering insufficient stroke pressure over extended periods.

For distributors managing B11 Eastar or Fulwin 5 aftermarket inventory across Middle Eastern, Latin American, or CIS markets, these certifications provide the traceability documentation and batch consistency records increasingly required at the importer qualification level.

OEM / ODM Private Label Service
XUI3813L supports full private label customization. For distributors targeting Middle Eastern Chery aftermarket channels, Arabic-language packaging and regional barcode formats are available. Latin American distributors can request Spanish or Portuguese dual-language pack configurations. Seal compound selection is adjustable for operating environment — particularly relevant for high-temperature markets in the Middle East and North Africa where thermal cycling accelerates standard seal wear.
Workflow: Sample confirmation → Specification approval → Mass production → Private label packaging → Shipment

Market Application
Middle East — Chery Eastar was actively distributed across Saudi Arabia, Syria, and Egypt; as original OE supply has ceased, aftermarket manufacturing is now the sole hydraulic clutch supply channel for B11 platform vehicles in this region
Latin America — Eastar sold across Chile, Colombia, and Venezuela; independent workshops servicing long-life B11 vehicles drive sustained and consistent parts demand
Russia & CIS — B11 Eastar was distributed through Chery's CIS network through the late 2000s; aging vehicle population sustains aftermarket replacement demand as these vehicles enter their second decade of service

Q1: Does XUI3813L fit both the Eastar and Fulwin 5, or just one model?
Both. The B11FL Fulwin 5 is a platform evolution of the B11 Eastar sharing the same clutch hydraulic system and firewall mounting geometry. B11-1602020 is the applicable OE reference for the full production range of both models, and XUI3813L is a confirmed direct fit for each.

Q2: The bore is 15.87mm — same as XUI3807A for the A15 Fulwin. Are these parts interchangeable?
No. While bore diameter is identical, the mounting geometry and port thread specification differ between A15 and B11 platforms — A15 uses Φ34/56 mounting with M12×1.0 port thread, while B11 uses Φ33.9/74 mounting with M10×1.0. Always verify the full specification and OE number before ordering. Bore diameter alone is not sufficient for fitment confirmation.

Q3: What documentation is available for distributors importing this part into Middle Eastern or Latin American markets?
ISO 9001 and IATF 16949 certificates, OE cross-reference sheets, and product conformity statements are available on request. Custom product datasheets in Arabic, Spanish, or Portuguese — referencing both Eastar and Fulwin 5 fitment — can be arranged for private label programs targeting specific regional markets.