G07 X7- what plastic parts tend to fail?

cjx23x · 01-18-2025, 09:46 AM

I understand that, for some reason, BMW uses some pieces in the engine that become brittle and fail over time.

Just curious what these tend to be.

If you’re fixing one, does it make sense to replace a few other while you’re in there?

admranger · 01-18-2025, 05:15 PM

Oil filter housing and the main coolant expansion tank would be two.

01-18-2025, 09:46 AM	#1
cjx23x New Member 3 Rep 17 Posts Drives: X5 Join Date: Dec 2024 Location: USA iTrader: (0)	G07 X7- what plastic parts tend to fail? I understand that, for some reason, BMW uses some pieces in the engine that become brittle and fail over time. Just curious what these tend to be. If you’re fixing one, does it make sense to replace a few other while you’re in there?
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01-18-2025, 05:15 PM	#2
admranger Retired Curmudgeon 3290 Rep 4,437 Posts Drives: ‘19 X3M40i Join Date: May 2011 Location: Las Vegas, NV iTrader: (1)	Oil filter housing and the main coolant expansion tank would be two. __________________ '19 X3 M40 Carbon Black/Oyster, '21 X7 40i AW/Black, Past BMWs: '18 M550i, '18 330 GT, '16 X5 40e, '11 E90M3, '06 X5 4.4, '03 330i ZHP, '02 M3, '97 Z3 2.8, '95 M3 (2x), '94 530i (manual), '92 525i (manual), '88 M3, '87 325iS
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