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G3,G4 Alternator Belt Tensioner Pulley (Pulley For 030145299C)

This replacement alternator tensioner pulley is designed for VW small-block petrol engines and serves as a direct-fit replacement for the pulley used on the main alternator belt tensioner assembly. The pulley is a common wear component—its bearing runs continuously whenever the engine is running and can degrade over time, causing belt squeal, vibration, or a harsh rumbling noise from the auxiliary drive system.

A worn or seized pulley can lead to premature belt wear, alternator charging issues, or excessive heat in the belt system. Replacing the pulley alone is a cost-effective solution when the tensioner body is still in good condition.

Manufactured with an OE-quality sealed bearing and precision-machined pulley surface, this replacement ensures smooth rotation, quiet running and long service life. It is designed to match the factory pulley profile so the belt tracks correctly across the auxiliary tensioner.

Technical Specification

  • Outer Diameter: 70mm

  • Width: 26mm
    (Identical to the pulley supplied on the complete tensioner unit)


Confirmed Fitment

Fits all the same applications as the full alternator belt tensioner:

VW Golf Mk3 (1995–1998)

(From chassis 1H-S-120 001 >>)

  • 1.4 – ABD, AEX

  • 1.6 – AEA, ABU, AEE

VW Golf Mk4 / Bora (1998–2004)

1.4 Engines: AXP, BCA, APE, AHW
1.6 Engines: AKQ, ATN, AUS, AZD, AHW, BCB, BAD

VW Polo – Various Models

1.0 / 1.05 Engines: AEV, AER, ALL
1.3 Engines: ADX
1.4 Engines: AEX, AFH, AKV, ANX, APQ, AFK
1.6 Engines: AEA, AEE, AHS, AJV

Suitable for any VW small-block auxiliary belt system requiring a 70mm x 26mm tensioner pulley.

This Part Fits: Mk3 Golf, Mk4 Golf, Mk3 Polo,

Availability: Special Order Item

Item Name: Tensioner Pulley, v-ribbed belt

Description: Tensioner Pulley, v-ribbed belt

Product Group: Engine

Group: Belt Drive

Unit of Measure: Each

Manufacturer: JP

Dimensions:

Width: 78mm

Height: 78mm

Depth: 53mm

Volume: 322452mm3

Weight: 0.121kg

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