The X5 has been waiting for this upgrade. It's been out of stock for a while. After replacing the thermostat, I checked again. It was in stock. Ordered it Mon and it arrived yesterday. BMW sure uses a high pressure cap on older models. All new models are now a more industry standard close to 16-18 lbs. The new cap should provide time to fix other items before a coolant system overhaul. A new tank is ready to go on. The current tank is a replacement from marking. I won't know until it's replaced. I've read so many stores about plastic parts failures. Texas being a hot summer state, I think it's worth a try. It does have a new fan and clutch. The auxiliary fan is brushless for efficiency. I'll follow up on it when hot weather is here.


https://germanautosolutions.com/stor...r-coolant-cap/

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'06 X5 3.0i - bought @143,123 miles (12/26/20)