Mercedes-Benz M271 W212 ZF Hydraulic Power Steering Pump with Pulley A0064667501 - Used Original Parts

Quick Answer

This pump is the right fix when a W212 E-Class with the M271 four-cylinder has a whining, groaning or heavy-feeling steering that persists after the fluid level and belt have been checked. A tested Genuine used ZF pump makes sense in Malaysia because it is the same factory-spec unit the car was built with, at a fraction of the cost of a new one. It is also far less of a gamble than an untested aftermarket reman, especially on a car that already works hard in heat and stop-go traffic.

Diagnosis and Common Symptoms

The M271 W212 uses an engine-driven ZF vane-type hydraulic pump, turned by the serpentine belt through the pulley. Unlike electric steering racks, this pump has no control module of its own, so it usually will not store a dedicated fault code. A failing pump often gives no dashboard warning at all, and diagnosis is mostly mechanical. Typical signs are:

• Whining or groaning that rises with engine rpm and gets louder at full steering lock.
• Steering that feels heavy at idle or when parking, then lighter as the revs climb.
• Intermittent assist loss when the engine is hot, a common pattern with worn internal vanes or a weak pressure-relief valve.
• Foamy, aerated or dark fluid in the reservoir, which points to air ingress or internal wear. Metallic particles in the fluid mean the pump is shedding material.
• Fluid seepage around the pump shaft seal, the pressure line fitting or the rear of the housing, often with a wet or dirty pulley area.
• Belt squeal or belt wear caused by a tight or seizing pump bearing, or a pulley with wobble.
• Steering judder or a rough feel through the wheel on lock.

Before condemning the pump, check these first, because they mimic pump failure:

• Fluid level and condition.
• A leaking pressure or return hose.
• Belt tension and the tensioner.
• A leaking steering rack. If the old fluid is contaminated, a rack or hose fault may have damaged the pump, so flush the system.

Introduction

This is a Genuine used ZF power steering pump with pulley, removed from a Mercedes-Benz W212 E-Class running the M271 engine. Each unit is tested for smooth operation, shaft rotation, pulley condition and the absence of leaks before listing. Because it is a Genuine original part, the fit, pulley offset and port layout match the factory design exactly. Actual photos and videos are provided so you can inspect the exact unit you will receive.

Product Details

• Brand: Mercedes-Benz (ZF)

• Model Compatibility: Mercedes-Benz E-Class W212 with M271 4-cylinder engine (verify by part number on the pump label)

• Part Name: ZF Hydraulic Power Steering Pump with Pulley

• Condition: Genuine Used (Tested Working)

• Notes: Hydraulic vane pump, belt driven. No coding or programming is needed after installation.

• Notes: Replace the pressure and return seals or O-rings, and use fresh Mercedes-approved power steering fluid.

• Notes: Flush the system if the old fluid was dark or contaminated, then bleed the air thoroughly before the test drive.

• Notes: Inspect the belt, tensioner and pulley alignment at the same time.

• Notes: Match the ZF part number on the pump label with your old unit before ordering, since pump specification varies by market and equipment.