BMW part number 37 12 1 094 613 (37121094613) is the Pneumatic Spring, Left, a suspension part catalogued for the E39 (520d, 520i, 523i). As of our last check (2026-09-28, bmwpartsdeal.com), it is still available new from BMW. 1 kit or reman option, 2 repair guides below.
Listed as orderable new at bmwpartsdeal.com when checked.
No sourced aftermarket equivalent recorded yet. We only list brand numbers that a brand catalog or vendor page explicitly cross-references to this BMW number.
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No interchange recorded. That doesn't prove there isn't one; it means we have no sourced match yet.
No forum workaround recorded yet. If you know a thread, the hunt team wants to hear about it.
No DIY route recorded yet.
Write-ups and videos from owners, forums and specialists on removing and fitting this part. Summaries are ours; follow the link for the full steps, photos and torque values, and credit goes to the original author.
Same procedure as the right side for the E39 Touring rear left air spring: relieve pressure through the air line, release the top fitting from inside the cargo area, then the lower bolt from below.
Tools mentioned: Jack and stands, sockets, BMW diagnostic software
Build-series video installing the factory-style rear air suspension on an E39 wagon; a useful visual walkthrough of where the rear air springs and their lines mount.
Part of an M5-wagon build, not a straight like-for-like repair.
Listed $389.41 on bmwpartsdeal.
Live eBay listings are coming soon. Until then, search eBay directly for this number with the links below.