I have just compared the China Jetta master cylinder to the old A1 cylinder.

The stock Brake Fluid Reservoir Bottle had a longer distance between 2 legs but the holes in new master cylinder is pretty close.

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Figured out that the 22mm cylinder needs the’Tall version” Brake Fluid Reservoir Bottle. This bottle was using in China Jetta King & Mk3 Golf

The China part number is 1H1 611 301A (also use 1H1 611 349).

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