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View listing at FCP Euro; opens in a new tabBMW E36/E46 · Buyer's guide
E46 M54 Upper & Lower Intake Boots: Lean-Code Vacuum-Leak Guide
E46 non-M M54 325/330, including RWD/xi where the exact product application states; M52TU, M56 SULEV and S54/M3 excluded
Current seller options
WHERE TO BUY
Open an exact listing, then confirm fitment, stock, price, and shipping with the seller before ordering.
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E46Seller listing
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View listing at FCP Euro; opens in a new tabE46Seller listing
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What you need to know
M54 325/330 only. M52TU, M56 SULEV and S54/M3 are excluded. Inspect the hidden underside and idle-control branch before assuming the upper boot is the only leak.
OEM numbers
Checked lower boot with idle-control branch 13541435627checked upper airflow-meter boot 13541438761. They are separate pieces and both must be inspected.Supersession
Two-piece intake-boot guide; no universal supersession asserted.
Fitment
M54 325/330 only. M52TU, M56 SULEV and S54/M3 are excluded. Inspect the hidden underside and idle-control branch before assuming the upper boot is the only leak.
Aftermarket options
Rein, Febi, genuine BMW and complete two-boot kits are checked. Silicone alternatives require exact branch and clamp compatibility.
Before you buy
Lean codes do not prove a boot leak. Smoke-test the intake and inspect DISA, CCV, caps, gaskets and hoses. M54 uses distinct upper/lower pieces; M52TU/M56/S54 are excluded.
Research and fitment sources
Supersede reviewed 7 unique research sources for this guide. 4 also appear above as a seller or official action and are not repeated here; 3 additional citations follow.
Research last verified .