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NHC MOTORS · SERVICE RECORD

MINI Cooper S transmission oil: the job continues after refilling

Transmission oil is not changed as often as engine oil, so using the correct fluid and completing the required procedures both matter. We serviced this 2020 MINI Cooper S at 54,415km using BG MAX equipment and completed the oil-wear reset with a diagnostic tool.

Oil condition shown in collection containers
Oil condition shown in collection containers
2020 MINI Cooper SPhoto record: 2026-09-1154,415km · Published 2026-09-22

01 / NHC MOTORS

Checking mileage and draining the oil

The instrument cluster showed 54,415km before work. Transmission-oil intervals are longer than engine-oil intervals and can be overlooked, so recorded mileage is a starting point for the inspection.

The transmission oil was drained and collected.

Instrument cluster: 54,415km
Instrument cluster: 54,415km
Draining transmission oil
Draining transmission oil
Oil collected during servicing
Oil collected during servicing

02 / NHC MOTORS

Servicing with BG MAX equipment

We connected BG MAX equipment to the vehicle for the transmission-oil service. The used oil was collected in containers and inspected.

Correct fluid specification and filling procedure matter as much as the equipment. The job includes checking the drained quantity and setting the oil level according to the transmission's service procedure.

Transmission-oil service connection
Transmission-oil service connection
Transmission-oil work with BG equipment
Transmission-oil work with BG equipment

03 / NHC MOTORS

Checking oil temperature and completing the wear reset

The diagnostic tool specified 40–58°C as the oil-temperature condition for the wear reset. The displayed temperature was 48.5°C, within that range, when the procedure was carried out.

The screen then confirmed a successful transmission oil-wear reset. The 40–58°C range is the condition for that reset function, not a specification for fluid-level adjustment.

Oil temperature during the wear reset: 48.5°C
Oil temperature during the wear reset: 48.5°C
Transmission oil-wear reset completed
Transmission oil-wear reset completed

Related maintenance reading

Questions before booking

When should transmission oil be changed?

It depends on the vehicle, transmission and driving conditions. Mileage and drained-fluid condition help determine an appropriate interval.

Are the oil-wear reset and level adjustment the same job?

No. Level adjustment sets the actual fluid quantity under specified conditions; the wear reset is a separate diagnostic procedure. The reset completion screen was recorded on this vehicle.

Why use a diagnostic tool during a transmission-oil service?

On this MINI it was used to verify the temperature condition and perform the oil-wear reset. The required functions depend on the vehicle and transmission.

MINI transmission oil: inspection based on mileage and condition

Mileage and drained-oil condition help determine whether servicing is due. Contact us to arrange a transmission-oil inspection.

We explain the work and cost before proceeding with your agreement.

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031-258-1617 · NHC Motors, Gwonseon-gu, Suwon · By appointment

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