Arnott Industries Air Suspension Spring P/N:A-3636
Restore a level, controlled ride at the rear of your BMW with the Arnott Industries Air Suspension Spring (MPN A-2737). This rear-left air spring assembly is a direct-fit replacement for the 2001-2003 BMW 525i, 1999-2000 BMW 528i, and 1999-2003 BMW 540i — see the Buyer's Guide tab for engine-level details. As part of the air suspension, it cushions the vehicle and helps maintain proper ride height; a leaking, cracked, or sagging air spring can cause a low or uneven stance, harsh ride, or a suspension warning.
For best results, Arnott recommends replacing the air springs in pairs so both sides settle and perform evenly.
Interchange: 40-231990
40231990 · 37121094613 · 37121095081
This part cross-references / interchanges with the following part numbers:
Which vehicles does this air spring fit?
It's a rear-left fit for the 2001-2003 BMW 525i, 1999-2000 BMW 528i, and 1999-2003 BMW 540i. Check the Buyer's Guide tab to confirm your specific vehicle and engine.
What position is this air spring?
This is the rear-left air suspension spring assembly. It installs on the driver's-side rear corner of the air suspension.
What does an air suspension spring do?
It cushions the vehicle and helps support proper ride height as part of the air suspension, using pressurized air to absorb road impacts and keep the vehicle level.
What are signs this air spring may need replacing?
A sagging or uneven rear stance, a harsh ride, audible air leaks, or a suspension warning may indicate a leaking or cracked air spring. Diagnose the cause before replacing.
Should I replace both sides at once?
Arnott recommends replacing the air springs in pairs for even, balanced ride quality. This listing is for one rear-left assembly; order two for a complete rear replacement.
WARNING: These products can expose you to chemicals including lead and phthalates, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.