M5 M6 BMW S85 V10 Smg pump chf11s fluid top off filling and change info. How to fill smg fluid DIY

This video shows where to fill the SMG pump fluid on the smg unit.

The system does not need to be depressurized when you open up the smg pump reservoir. There is no pressure in the SMG pump reservoir. The pressure is in the lines, pump and accumulator. It’s similar to power steering reservoir and brake fluid reservoir where you can open the reservoir to refill.

If you are planning to change out your smg pump, lines or accumulator, you will need to depressurize the system with a computer program similar to INPA/ISTA. I replaced my smg pump with a complete unit about 5 years ago and it required using INPA to bleed the system.

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