Removing the catalytic converter of cylinders 1 to 4
WARNING: This page is about a different car, the 2022 BMW X7, 2021 BMW X7, 2020 BMW X7, and 2019 BMW X7. However, it is still accessible from the selected car via links, so may be relevant.
Precondition
- Ignition is switched off.
WARNING:
Hot surfaces
.
Risk of burning!
Risk of burning!
- Perform all work only on components that have cooled down.
Preliminary work
- Refer to REMOVING THE LEFT AND RIGHT UNDERSHIELD (TANK COVER) .
- Refer to REMOVING THE REAR LEFT AND RIGHT TENSIONING STRUT .
- Refer to REMOVING THE LEFT AND RIGHT REAR DIFFUSER .
- Refer to REMOVING EXHAUST SYSTEM .
- Refer to REMOVING THE ACOUSTIC COVER .
- Refer to REMOVING LEFT INTAKE SILENCER HOUSING .
- Refer to REMOVING RIGHT INTAKE SILENCER HOUSING .
- Refer to REMOVING THE LAMBDA OXYGEN SENSOR .
- Refer to REMOVING THE LEFT LAMBDA OXYGEN SENSOR .
- Refer to REMOVING THE LEFT INTAKE SILENCER BRACKET .
- Refer to REMOVING UPPER HEAT SHIELD .
- Refer to REMOVING THE RIGHT INTAKE SILENCER BRACKET .
- Refer to REMOVING THE RIGHT TENSION STRUT ON THE SHOCK TOWER .
- Refer to REMOVING COVER FOR THE RIGHT DME CONTROL UNIT .
- Refer to REMOVING THE RIGHT UNFILTERED-AIR DUCT .
- Refer to REMOVING THE RIGHT OXYGEN SENSOR MONITOR .
WARNING:
Hot exhaust system
.
Risk of burning!
Risk of burning!
- Any work must exclusively be carried out with an exhaust system that has cooled down.
NOTE:
RISK OF DAMAGE
Damage to the gasoline particulate filter .
Forcibly removing, installing or dropping the gasoline particulate filter down will damage it .
Damage to the gasoline particulate filter .
Forcibly removing, installing or dropping the gasoline particulate filter down will damage it .
- Remove and install the gasoline particulate filter without damaging it and without applying external force.
- Avoid impacts/knocks to the gasoline particulate filter (e.g. by tools, falling down, hard contact with base).
- Loosen screws (1) to (3).
- Remove screws (arrows).
- Feed out and remove the thrust field (4) in the area (5) of the wheel arch trim panel.
- Unscrew the nuts (1) for cylinders 1 through 4 below on the catalytic converter.
- Loosen catalytic converter from holder.
- Release bottom screw (1) heat shield.
- Release the heat shield (2) from the lower heat shield.
- Release top screw (1) heat shield.
- Release right heat shield (2) from the other heat shield.
- Thread out and remove right heat shield (2) towards top.
- Loosen circlip (1) and remove.
- Loosen screws (1).
- Loosen screws (2).
- Loosen screw (3).
- Remove holder (4).
- Lift the catalytic converter for the cylinders 1 to 4 (1) to the top.
- Screw out and remove the catalytic converter for the cylinders 1 to 4 (1).