Volkswagen Polo Service & Repair Manual: Oxygen Sensor Unit Protective Pipes
 Note
| In addition to using the part number, the protective pipe
can also be used for identification. |
| Version D1, 6 openings, 3.5 mm each |
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| Only used with the 4-pin oxygen sensor |
| Version D2, 6 openings, 2 mm each |
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| Used with 4-pin and 6-pin universal oxygen sensors. |
| Version D4, 12 openings, 1.4 mm each |
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| Used with 4-pin and 6-pin universal oxygen sensors. |
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Note
Use the faulty sensor as a guide for installing all of the
accompanying attachments, cable ties or marking bands.
Do ...
Special tools and workshop equipment
required
Torque Wrench 1331 5-50Nm -VAG1331-
...
Other materials:
A/C System, Operating after Charging
Caution
If it is suspected that chemicals were added to the
refrigerant circuit to seal leaks, do not connect the
A/C service station and do not extract the refrigerant.
...
Heel and Toe Wear
Heel-and-toe wear is step-like wear of individual tread
blocks, due to which an increased rolling noise can develop. The
heel-and-toe wear is caused by the uneven distortion of the
tread blocks in the contact patch. Heel-and-toe wear appears in
more extr ...
Important Information when Working with the A/C Service Station
Caution
If it is suspected that chemicals were added to the
refrigerant circuit to seal leaks, do not connect the
A/C service station and do not extract the refrigerant.
...
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6-Pin Universal Oxygen Sensor, Removing and Installing
Special Tools