Original ATE BMW Brake Fluid Reservoir – 3 Outlets – Manual Transmission – 34321112399

Original used ATE/BMW brake-fluid reservoir with three hose connections for selected classic BMW models with a manual gearbox.

This remote brake-fluid reservoir supplies the two brake circuits and the hydraulic clutch circuit. The assembly includes the original black cap, mounting bracket, three attached braided hoses and existing clamps shown in the photographs.

Product details

• Product: Brake-fluid expansion reservoir
• Alternative description: Remote brake-fluid reservoir
• German description: Bremsflüssigkeitsbehälter
• Manufacturer: ATE / BMW
• BMW part number: 34321112399
• Formatted BMW number: 34 32 1 112 399
• ATE reference: 03.3508-5951.3
• ATE reference number: 310039
• Number of outlets: Three
• Application: Brake and clutch hydraulic system
• Transmission: Manual gearbox
• Condition: Used
• Quantity: One reservoir assembly

Vehicle compatibility

Suitable for selected manual-transmission BMW models, including:

BMW 02 Series / E10

• BMW 1502
• BMW 1602
• BMW 1802
• BMW 2002
• BMW 2002tii
• Selected Touring and Cabriolet models

BMW Neue Klasse

• BMW 1500
• BMW 1600
• BMW 1800
• BMW 2000

BMW E21

• Selected 316, 318 and 320 manual-transmission models

BMW E3 and E9

• Selected 2500, 2800, 2.5 CS, 2800 CS and 3.0 CS/CSi manual-transmission models

BMW E12

• Selected early 518 manual-transmission models

Compatibility depends on the model, production date, market specification and installed brake and clutch system. Always compare the part number, outlet arrangement, hose diameters, bracket and reservoir shape before ordering.

Part-number information

• 34321112399 – Three-outlet reservoir for manual-transmission applications
• 34 32 1 112 399 – Formatted BMW number
• ATE 03.3508-5951.3 – ATE reference
• 310039 – ATE reference
• 34321112402 – Different two-outlet reservoir for selected automatic-transmission models

The third outlet is used for the hydraulic clutch circuit. The two-outlet automatic version is not interchangeable without verifying the complete hydraulic system.

Condition

Used original ATE/BMW component with visible age-related wear:

• Dirt and storage marks
• Yellowing and discolouration of the plastic
• Scratches and cosmetic wear
• Surface corrosion on the metal bracket
• Aged braided hoses
• Used hose clamps
• Possible hardening or deterioration of the hoses

The reservoir has not been pressure-tested or function-tested by us. Inspect the reservoir, cap, connections, hoses and bracket carefully before installation.

Because this is a brake and clutch hydraulic component, it must be confirmed leak-free and suitable for brake fluid before use.

Included

• One original ATE/BMW three-outlet reservoir
• Original black screw cap
• Mounting bracket
• Three attached used braided hoses
• Existing clamps shown in the photographs

The master cylinder, clutch master cylinder, brake fluid, new hoses, new clamps and mounting hardware are not included.

Installation recommendation

Before installation:

• Confirm that the vehicle requires the three-outlet manual-transmission version
• Compare the original component with BMW number 34321112399
• Inspect the plastic for cracks or distortion
• Check the cap and filler neck
• Inspect all three outlets for damage
• Replace old or hardened hoses
• Replace corroded clamps
• Clean the reservoir thoroughly
• Use only the correct brake fluid
• Bleed the brake and clutch systems completely
• Check all connections for leaks
• Test brake and clutch operation before driving

Installation and bleeding should be performed by a qualified technician.

Storage location: 204