Location of elements
NOTE: Left hand drive shown, right hand drive similar.
| Pos. | spare part no | Name |
| A | - | Arrangement of brake booster elements - i6 engine |
| B | - | Arrangement of brake booster elements - TD4 engine |
| 1 | - | Vacuum line - i6 engine |
| 2 | - | Vacuum pump - i6 engine |
| 3 | - | Vacuum tube - TD4 engine (until 2010 MY) |
| 4 | - | Vacuum pump - TD4 engine |
| 5 | - | Control valve |
| 6 | - | Vacuum brake booster |
Support for the operation of the brake system is provided by an inactive type vacuum booster.
The brake booster is a compact unit, it takes up less space than a conventional brake booster and improves the car's behavior in a collision. The unit is equipped with cooperating tandem membranes with a diameter of 203.20 mm and 228.60 mm.
The block is located in the engine compartment on the driver's side, hermetically sealed against the partition of the engine compartment with a gasket and secured with four studs and nuts. The push rod of the brake booster is connected to the brake pedal by means of a finger. The output pusher of the booster is located in the main piston of the main brake cylinder. For more information, see chapter: Hydraulic brakes (206-06 Hydraulic brakes, Description and principle of operation).
Vacuum elements
On both the i6 petrol engine and the TD4 diesel engine, the vacuum required to operate the brake booster is generated by a vacuum pump located at the rear of the cylinder head. The vacuum pump is driven by an intake camshaft.
A rigid plastic piping connects the vacuum pump to a check valve that is mounted on the front chamber of the brake booster. The length and layout of this piping is different for left-hand drive and right-hand drive versions.
The non-return valve maintains the vacuum necessary for the operation of the brake booster and does not let air into the front chamber.
Vehicles equipped with the system «Stop/Start» - starting from MY 2010
| Pos. | spare part no | Name |
| 1 | - | Brake booster vacuum sensor |
Brake booster vacuum sensor
The vacuum sensor in the brake system, presented on vehicles with the system «Stop/Start», designed to control the vacuum level in the brake servo. The vacuum sensor is installed in the vacuum tube and wired to the ECM. For more information, see the chapter: Starting system (303-06C Starting system - 2.2L Duratorq - Td4, Vehicles built from 03/2009, Description and function).
Comments on this article