BMW F15 Air Suspension Compressor - Used Original Parts

Diagnosis and Common Symptoms

From a workshop perspective, a failing F15 air supply unit presents a clear set of diagnostic markers. The iDrive system will typically display a "Chassis function restricted" or "Level control system failure" error message. A diagnostic scan of the EHC (Electronic Height Control) module will reveal specific fault codes, most commonly:

• 4430A4: Air supply unit: pressure too high
• 4430A5: Air supply unit: temperature too high
• 4430A6: Air supply unit: compressor running time
• D01B2A: Signal (actual value, ride height, rear axle) invalid

Physical symptoms include a sagging rear suspension, often more pronounced on one side, that fails to raise. You may hear the compressor running continuously without lifting the vehicle, or it may be unusually loud. In other cases, the compressor may not activate at all due to a burnt-out motor or a tripped thermal protection switch from being overworked, which is often caused by a leak in the air springs or lines.

Introduction

Restore your BMW's ride height and chassis stability with a cost-effective, Genuine BMW Air Suspension Compressor. This is not an aftermarket part; it is an original component removed from a donor vehicle, ensuring perfect integration with your F15's complex electronic systems. Each unit has been meticulously bench-tested by our technicians to verify it meets BMW's pressure and performance specifications. Trust in a tested, genuine part to bring your vehicle's suspension back to factory standard.

Product Details

• Brand: BMW

• Model Compatibility: BMW X5 (F15) 2014-2018, BMW X6 (F16) 2015-2019

• Part Name: Air Suspension Supply Unit / Compressor

• Condition: Genuine Used (Tested Working)

• Notes: It is critical to replace the compressor relay (part no. 61368373700) during installation to prevent premature failure of the replacement unit. We strongly advise inspecting the entire system for air leaks prior to fitting.