Automatic Transmission: Checking ATF Level (VW Polo 4)

In an automatic transmission, the ATF (Automatic Transmission Fluid) level depends on the oil temperature. At the service station, a VW/SEAT diagnostic device is used to measure the ATF temperature. Therefore, it is recommended to entrust this work to the service station. ATF is not subject to replacement. The ATF level is monitored and, if necessary, replenished only as part of maintenance.

The correct ATF level is of utmost importance for the correct operation of the automatic transmission. Both too low and too high ATF levels have a negative effect on the operation of the transmission.

Special tool required:

• Oil can or filling syringe.
• Protective glasses.
• ATF collection container
• Suitable device for measuring oil temperature.

Necessary consumables/replacement parts:

• Automatic transmission oil for VW/SEAT specification G 052 990 A2.
• Sealing ring for plug.
• Protective cap for the plug.

General instructions regarding automatic transmission and ATF

Do not start the engine if the gearbox is not filled with ATF. Do not tow the vehicle if the gearbox is not filled with ATF. When performing all work, ensure exceptional cleanliness, since even minor contamination causes gearbox malfunctions.

Checking the oil level

Attention: To start the test, the oil in the gearbox must have a temperature below +30°C. This temperature is reached after a short period of engine operation. At the service station, a diagnostic device is connected to the vehicle's diagnostic connector to monitor the temperature. Without a diagnostic device, the temperature can only be determined approximately.

Safety instructions

Protect your eyes, ATF is leaking. Wear safety glasses.

The ATF temperature during the test must not exceed +30°C. In addition, the emergency mode function must not be activated.

Set the automatic transmission mode selection lever to position P, turn off the air conditioning and heating systems.



Place the ATF collection container down. Unscrew the "arrow" plug. The amount of ATF in the overflow tube flows out.

Cut the sealing ring on the plug with side cutters and replace it.

Make sure the overflow tube is screwed in all the way.

Start the engine and let it run until the ATF temperature reaches a value between +35°C and +45°C.

If at an ATF temperature of +35°C to +45°C, as a result of the oil level rising due to heating, it starts to drip from the overflow tube, then the ATF level is OK. In this case, turn off the engine, screw in the plug with a new sealing gasket and tighten to a torque of 15 Nm.

If at an ATF temperature of +35°C to +45°C oil does not drip from the overflow tube:



Press the protective cap of the "arrow" plug with a screwdriver. The cap is destroyed and must be replaced. The cap protects the place where the plug is installed.

Note: Depending on the gearbox version, the cap may have a clamp mount. Such a cap can be reinstalled.

Remove the plug from the filler tube.



Insert the oil can nozzle and pour ATF until oil comes out through the inspection hole (overflow tube) "arrow". The oil can must first be raised higher, for example, hung on the hood of the engine compartment. In addition, the ATF level can be replenished using a filling syringe.



Screw in the "arrow 1" plug with a new sealing ring and tighten to a torque of 15 Nm.

Place the plug on the filler pipe so that the plug is secured with a clamp, or insert the plug and close it with a new protective cap "arrow 2".

Note: When using a version with a protective cap, always replace it with a new one, as it protects the plug.

If necessary, turn off the ignition and remove the temperature measuring device.