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01M Pump

$314.99
In stock • ships from the USA • qualifies for FREE shipping

01M Pump, used and ready to install. Fits the 01M. Ships fast from the USA.

Secure Stripe checkout • free shipping over $100 • 30-day returns
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Ships from the USA
30-day returns

About this product

Looking for an oil pump for a VW 01M four-speed automatic in a Jetta, Golf, GTI, Cabrio or New Beetle? This is a used OEM 01M pump, pulled and ready to go into a transmission that has lost pressure, has a damaged pump from overheating, or is being rebuilt and needs a clean, known-good pump body instead of a scored one.

What the oil pump does in an 01M

The 01M is Volkswagen's electronically controlled transverse four-speed, built from 1995 to 2005 and closely related to the STA-designed AR4, AD4 and AD8 units used by Renault. It has a lockup torque converter, planetary gearsets and clutch and brake elements, all applied hydraulically by solenoids in an aluminum valve body. The pump is the only source of that hydraulic pressure. It is driven from the converter whenever the engine turns, so it also feeds converter charge, lockup, the external fluid-to-coolant heat exchanger mounted on top of the case, and lubrication. Because 01M fluid also runs hot in traffic, a pump that has been through a cooked-fluid episode often comes out with scored gear pockets or a worn hub contact surface, and from then on pressure sags whenever the fluid is warm.

Symptoms of a failing 01M pump

Many of the same complaints come from solenoid and wiring faults, worn solenoid bores in the valve body, or torn piston diaphragms, so the pump should be the conclusion of a diagnosis, not the first guess.

How to confirm it is the pump

Scan the transmission module for stored faults and record each one before clearing. Check the fluid level with the engine running in Park at the specified cold temperature window, then put a gauge on the pressure tap and compare readings with specifications. Low pressure in every range that gets worse as the fluid heats is the pump pattern; electrical faults usually set solenoid codes first. Our line pressure guide covers the test, and the slipping diagnosis guide helps rule out the clutch and valve body side.

Fitment

The 01M was used in the Mk3 and Mk4 Golf and Jetta, GTI, Cabrio and New Beetle from 1995 through 2005, with the last Mk4 body-style cars in 2006. It replaced the 096, and while some external parts carried over, internal parts and converters are not interchangeable with the 096, the 01N longitudinal unit or the 01P/098 van transmission. VW built the 01M with several gear ratio codes, stamped on a pad above the starter flange. This pump comes as pictured with no year attached to the listing, so compare it with your old pump before installing, or send us your year, VIN and transmission code. More 01M parts are in our hard parts category, and a dated version is listed as the 01M pump for 1995.

Install notes


Specifications

Fits01M
Part typePump
ConditionUsed
BrandOEM
ShipsFrom the USA
Warranty1-year

01M Pump: common questions

Does this pump fit a 096 or an 01P transmission?

It is listed for the 01M. The 096 and the 01P/098 are related designs, but VW changed internal parts and converters between them, so do not assume a swap. Compare it with your old pump or send us your transmission code.

Is this pump new or used?

It is a used OEM 01M pump. Plan on fitting new seals and a gasket at installation.

What fluid does the 01M take?

VW G 052 162 A2 or an approved equivalent. Roughly 3.75 liters refills it after a pan and filter change, and the final drive uses its own separate oil.

Can a bad pump set code 00652?

It can. 00652 is a gear monitoring or ratio fault, meaning the module saw slip. Low pump pressure is one cause, along with low fluid, worn clutches and valve body faults, so test pressure before replacing parts.

How do I check the 01M fluid level after installing the pump?

With the engine running in Park and the fluid still in the cold window, remove the check plug under the pan. Fluid should just drip out; add through the fill tube until it does.


Repair guides for this job

Sources
  1. Wikipedia — Volkswagen 01M transmission. 1995-2005 applications, STA AR4/AD4 lineage, 096 predecessor, weak points, G 052 162 A2 fluid, 3.75 L filter-change fill and the check-plug level procedure. en.wikipedia.org/wiki/Volkswagen_01M_transmission
  2. Ross-Tech Wiki — Fault code 00652. Gear monitoring fault: possible causes and checks, from fluid level to internal clutch and hydraulic faults. wiki.ross-tech.com/wiki/index.php/00652
  3. Transmission Digest — 01M diagnosis on a 1998 Jetta. 01M solenoid resistance checks and an electrical fault that mimicked an internal failure, showing why electrical testing comes before parts. www.transmissiondigest.com/?p=18067

01M Pump

$314.99
In stock • ships from the USA • FREE shipping • 30-day returns

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