Haldex coupling pump VAG 02D525557 (1st generation)

  • Part Number: 02D525557
  • Brand: VAG
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  • Professional consultation.
  • Care for each customer.
  • Own warehouse.
  • Quality guarantee.
  • Weight, g 1000
  • Brand VAG
  • Model Audi A3 Quattro 1998-2003
    Audi S3 1998-2003
    Audi TT Quattro 1999-2006
    Seat Alhambra 4Drive 2001-2010
    Seat Leon 2000-2006
    Seat Toledo 1999-2004
    Skoda Octavia 4×4 1997-2008
    VW Beetle 4Motion 1999–2001
    VW Bora 4Motion 1998-2005
    VW Golf 4Motion 1998-2004
    VW Sharan 4Motion 2001-2010
  • Product type Pump
  • Generation 1

Description:

The Haldex coupling pump VAG 02D525557 (1st generation) is an electric pump that is used in all-wheel drive (4WD) systems of many modern vehicles. It is a key component that provides the hydraulic pressure required to activate the Haldex clutch and transfer torque from the transmission to the rear seat.

The axle is driven by the Haldex coupling:

1. ABS and ESP sensors continuously monitor wheel speed, wheel speed and other vehicle steering parameters.
2. The control unit analyzes data from the sensors, which means the amount of torque required to be transmitted to the rear seat.
3. The electric motor of the pump is activated by the control unit.
4. The vicor pump creates a hydraulic drive for the vise, which is then directed to the hydraulic cylinder.
5. The hydraulic accumulator saves pressure when the pump is not running, ensuring the hydraulic response when required.
6. The hydraulic pressure from the pump is directed to the hydraulic cylinder, which activates the Haldex clutch.
7. The clutch connects the transmission to the rear axle, transmitting torque.

Important: when servicing the Haldex coupling pump, follow the manufacturer's recommendations for components and service intervals. It is also necessary to contact a qualified auto mechanic for diagnosis and repair.

VAG

VAG

Germany

VAG (Volkswagen Aktiengesellschaft) is a German automotive group founded in 1937 by the German government. Today, it is one of the world's largest manufacturers, owning brands such as Volkswagen, Audi, Skoda, SEAT, Porsche, and others. The company develops and manufactures a wide range of components for its vehicles, integrating them into a unified ecosystem.

Interesting Facts

1. The group uses modular platforms (MQB, MLB) to unify spare parts. 2. VAG owns its own casting and stamping plants. 3. Original parts feature unique markings and anti-counterfeit protection. 4. The company actively invests in the development of its own engine management systems.

Main Specialization

Engine, transmission, suspension, braking system, electronics, body parts.

Type

Manufacturer/OEM Supplier

Key OEM Customers

Volkswagen, Audi, Skoda, SEAT, Porsche, Bentley, Lamborghini, Ducati

Opinion of Service Station Specialists

Original VAG parts ensure maximum compatibility and service life as specified by engineering calculations. However, due to high costs, mechanics often recommend using quality alternatives from suppliers that manufacture parts for the assembly line.

Quality Control

Production is certified according to IATF 16949 standards. Quality control is performed at every manufacturing stage, including automated strength and wear testing. Aftermarket products meet original equipment specifications.

Certificates

IATF 16949, ISO 9001, ISO 14001

Haldex coupling pump VAG 02D525557 (1st generation)
Haldex coupling pump VAG 02D525557 (1st generation)

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