Brake booster master cylinder PEUGEOT 407 2004

OEM: 9646980980-2

Disassembled car photo

Engine running

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Details for this exact part

Code
9646980980-2
OEM
9646980980-2
Condition
Used
Availability
1 in stock - ready to ship
Make, model
PEUGEOT 407 2004-2010
Year
2004
Engine
Diesel TURBO-CHARGED WITH FAP 1.6L 80KW DV6TED4
VIN
VF36D9HZC21078888

What is this part and why does it matter?

The brake master cylinder converts the driver’s pedal pressure (amplified by the booster) into hydraulic pressure, sent through brake lines to each wheel.

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Signs of a faulty part

If you notice any of the following, the part likely needs replacement:

  • Brake pedal sinks slowly to the floor under sustained pressure
  • Brake fluid leak visible near the pedal box or under the vehicle
  • Spongy or inconsistent brake pedal feel

Installation information

Requires bench-bleeding the new cylinder before installation, then bleeding the full brake system afterward — always use fresh brake fluid.

Frequently asked questions

A worn internal seal in this cylinder lets brake fluid bypass internally rather than building pressure, causing the pedal to slowly sink under sustained pressure.

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