I recommend you switch to a 1.4 bar expansion tank cap as soon as possible. Instead of the car letting you know you have a problem by letting go at the cap, the 2.0 bar is stronger than your brand new hoses, and let’s go by blowing slightly used cooling parts.

This isn’t some high performance cap. I know someone with a v12 Lamborghini that has a 1 bar cap. This is bmw perpetually making sure there is a client list for exploded tanks, hoses radiators and valley pans.

Swapped mine out years ago and never looked back.

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2006 4.8is, Black on White. SOLD Sniff Sniff.

2017 F85 x5m, Black on Red. BEAST MODE


"The older we grow the greater becomes our wonder at how much ignorance one can contain without bursting one's clothes." - Mark Twain

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