There are a total of four hoses/pipes going back there. Two go into the fire wall and the other two go into a manifold that connects to each head. The two going into that manifold required me to pull the intake manifold for replacement. The other two that go into the firewall are visible. You should be able to tell if those are leaking.

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2001 E53 4.4 Alpine White, Sports Package
2000 E36/7 2.8 5 speed Bright Red w/ a HT!