BMW 3 of the E46 series

since 1998 release

Repair and operation of the car



BMW 3 of the E46 series
+ BMW 3 Cars (E46)
+ Current leaving and service
+ Engine
+ Cooling systems, heating
+ Power supply systems, injection and release
+ Electric equipment of the engine
+ RKPP and transmission line
+ Automatic transmission
+ Coupling and power shafts
+ Brake system
- Suspension bracket and steering
   + Forward suspension bracket
   + Back suspension bracket
   - Steering with the hydraulic booster (servoupravleniye)
      Removal and installation of the block of a safety cushion on a steering wheel
      Removal and installation of a steering wheel
      Removal and installation of a tip of steering draft
      Removal and installation of steering draft
      Removal and installation of the pump of the hydraulic booster
      Filling with liquid and removal of air from a power steering hydraulic system
      Corners of installation of forward wheels. Check of installation of wheels
+ Body
+ Onboard electric equipment
+ Schemes of electric equipment





Steering with the hydraulic booster (servoupravleniye)

Elements of a steering column and steering wheel

1 — the top shaft
2 — the lower shaft with the cardan hinge
3 — elastic connection
4 — the wheel lock

6 — a shaft tube
7 — the top cover of a steering column
8 — the lower cover of a steering column
11 — a steering wheel


Rotation of a steering wheel is transmitted by the driver through a steering column and the steering mechanism, and also steering drafts on car wheels. The steering column can be regulated manually on height and in the longitudinal direction.

The effort necessary for turn of wheels, especially on the standing car, decreases thanks to existence of the hydraulic booster. The power steering consists of the oil pump, the tank of oil and oil pipelines. The oil pump is set in motion from the engine through maple a belt with edges. The pump we suck in oil from the tank and under a high pressure gives it to the valve case. The case of the valve is located in the steering mechanism. It has mechanical communication with a steering column and depending on the direction of a rearrangement of a wheel directs oil to the relevant party of the working cylinder. Here oil influences the piston with a gear lath, reducing, thus, effort which needs to be put for turn of a wheel.

In a steering wheel the safety cushion is located. The safety cushion represents the put bag which is inflated with air at frontal collision and thus protects a trunk and the driver's head from blow about a steering wheel. At frontal collision of a certain force in a safety cushion through a monitor the small charge ignites. As a result of explosion gases which during several milliseconds fill an air bag are formed. It is enough this time to damp the driver's trunk directing forward. Then the safety cushion within several seconds again develops as gases leave a pillow via outlets.

Carrying out welding by it leveling works on steering elements is not allowed. The self-stopped nuts surely are replaced with the new.


Security measures at the address with a safety cushion

Near a safety cushion of the driver in a steering wheel there is a safety cushion of the forward passenger located over a ware box, lateral safety cushions in the doorway and a safety cushion for the head over doors. It is not allowed to establish on a place of the forward passenger a children's seat or any other adaptation for keeping of children in the direction opposite to the movement. Besides, on a door rack, a solar peak or on the dashboard on the right side there has to be a plate "a children's seat ahead is not present". In the absence of the last the driver can be fined by police of Germany.

At removal and installation of the block of a safety cushion it is necessary to observe the following:

1 Disconnect a negative cable (-) of the battery at the switched-off ignition. The battery is in a luggage compartment behind a cover on the right side. At BMW 316i, 318i cars the battery settles down in a motive compartment.

As a result of shutdown of the battery data from memory of malfunctions of some monitors are erased. If necessary before shutdown of the battery it is necessary to consider these memories of malfunctions. Address to the Section Diagnostics of Malfunctions. Work it is desirable to carry out HUNDRED in conditions.


2 Isolate a negative pole (-) of the battery to exclude casual contact.
3 Before installation of a safety cushion again check, whether the negative cable of the battery is disconnected.

If the provided instructions are not followed, further it can lead to failure of system of a safety cushion.


General measures of safety

- After removal of a safety cushion store it so that the soft party specified upward.
- At connection of the battery stay in salon of the car of strangers is not allowed.
- If in work the break becomes, it is impossible to leave a safety cushion without supervision.
- Is not admissible to disassemble the safety cushion block. With malfunction it will be replaced completely. As the pillow contains explosive, it is necessary to store it reliably. Utilization of a pillow has to HUNDRED BMWs are carried out. It is not necessary to utilize a pillow independently at all. There is a danger of explosion!
- To replace the steering wheel containing a safety cushion it is allowed only on the steering wheel resolved by the manufacturer of the car.
- It is not necessary to paste over, something to draw or otherwise to process the soft party of a safety cushion. It can be cleared only the dry or moistened in water towel, and also the cleaner allowed for application by the manufacturer.
- If the pillow was used as a result of accident, it is necessary to replace its monitor, the block of a pillow and the contact block.
- The block of a safety cushion and a monitor are sensitive to blows. If they fell from height more than 50 cm, they cannot be applied further. If the pillow fell from smaller height it is necessary to check it for HUNDRED.
- The safety cushion is allowed to be checked only for HUNDRED. By no means it is impossible to apply a control lamp, the voltmeter or an ohmmeter to check of a pillow.
- When carrying out welding works the plug of the welding machine has to settle down in close proximity to a welding place. It is necessary a negative cable of the battery and to isolate a battery pole to exclude possibility of casual contact. It is necessary to rasstykovat shtekerny connections of a safety cushion to gas generators.
- It is not necessary to subject even to short-term influence of temperature above +75 °C the block of a pillow and a monitor.
- Observe instructions concerning a natyazhitel of a seat belt, address to the Section Natyazhitel of a seat belt. Main data and security measures.
Instructions on security measures at the movement
- The safety cushion does not replace a seat belt. Passengers of the car have to be fastened by belts, only it ensures optimum safety.
- Installation on a seat of the driver of any adaptations for deduction of children is not allowed. Children are younger than 12 years can settle down only on a back seat.
- The arrangement between a safety cushion and the person of any subjects is not allowed.