701 422 371B Power Steering Fluid Reservoir for VOLKSWAGEN

The 701 422 371B power steering fluid reservoir is referenced for Volkswagen Transporter T4 and selected EuroVan hydraulic steering systems. It stores the working fluid above the pump supply and provides space for return-flow separation before the oil re-enters the hydraulic circuit.

Commercial-vehicle operating conditions make cleanliness particularly important. A replacement reservoir should be approved together with the cap, hose connections and system fluid specification, not selected only by outside diameter.

Product Technical Specifications

Product type: Power Steering Fluid Reservoir

Primary OE reference: 701 422 371B

Internal item code: VM01016-002

Vehicle brand: VOLKSWAGEN

Application reference: VW Transporter T4 and selected EuroVan hydraulic steering systems.

Cross-reference numbers: 701 422 371B / 701 422 371

Reservoir Role in Hydraulic Steering

The tank supplies fluid to the power steering pump while receiving aerated return oil from the rack circuit. Correct internal volume and port routing help bubbles rise out of the fluid, reducing pump cavitation and maintaining consistent steering assistance.

Transporter T4 Fitment Evidence

Use 701 422 371B and the earlier 701 422 371 reference as the starting point. Compare the cap, bracket features, lower nipples and installed hose direction on the vehicle; T4 market, engine and steering configuration should be confirmed before bulk approval.

Symptoms Worth Investigating

Foam in the reservoir, groaning during turns, damp hose joints or repeated fluid loss may indicate leaks or air ingress. The tank is only one part of the diagnosis, so inspect suction hose condition, return hose, pump seals and rack boots at the same time.

Cleanliness and Incoming Inspection

Hydraulic components are sensitive to debris. Check the interior for moulding residue, verify that the cap seals evenly and ensure every hose spigot is smooth and circular. Open ports should remain capped or bagged until installation.

Fleet and Wholesale Supply Notes

Transporter specialists can source VM01016-002 for service programs, sample comparison or mixed steering-component shipments. State annual demand, destination, packing standard and whether the order must include a fitted cap.

Frequently Asked Questions

Is 701 422 371B used for coolant?

No. This reference is associated with the hydraulic power steering fluid reservoir, so it must be kept separate from coolant expansion-tank listings.

Which Volkswagen vehicle is the key application?

Transporter T4 and selected EuroVan applications are common references. Confirm by OE number, vehicle data and the removed reservoir.

Why is fluid cleanliness important during replacement?

Contamination can circulate through the pump and steering rack, causing noise, valve wear or seal damage. Ports should remain protected and the circuit should be serviced correctly.

What can cause bubbles in a steering reservoir?

Low level, a leaking suction hose, incorrect fluid, a restricted return path or pump-side air ingress can all cause aeration. Diagnose the full hydraulic circuit.

How do distributors request a quote?

Provide 701 422 371B, SKU VM01016-002, planned quantity, destination, cap requirement and any carton-label instructions.

Request a 701 422 371B Reservoir Quote

Send OE 701 422 371B, SKU VM01016-002, required quantity, destination and original-part evidence to AutoParts for application review and a wholesale proposal.

Fitment notice: OE and vehicle references support identification, but they do not replace VIN-, engine- or chassis-specific catalogue checks and direct comparison with the removed reservoir.

Inspection focus: Confirm round body, cap style, hose outlets, mounting ribs and return-flow layout.

Supply note: Suitable for commercial-vehicle steering service kits and distributor inventory.