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Rear suspension feels stiff/sagging on my 2023 750e xDrive

0

Mike T. · rep 0 · May 22, 4:05 AM · 1 replies · solved · Question

Vehicle: 2023 BMW 750e xDrive

Hi everyone,

I'm a bit concerned about the rear suspension on my relatively new 2023 BMW 750e xDrive. It only has about 15,000 miles on it, but lately, the rear end feels incredibly stiff, almost like there's no give, and sometimes it looks like it's sagging a bit, especially on the passenger side. It's equipped with the adaptive air suspension.

The ride quality has definitely deteriorated, and it's much harsher over bumps. I haven't hit any major potholes or had any accidents. I'm worried this might be an issue with the air suspension system.

Has anyone else experienced similar problems with their G70 7 Series or other BMWs with air suspension? What should I be looking for, and is this something that's covered under warranty?

✓ Accepted solution

ClearTheCode Admin

ClearTheCode Team · rep 0 · May 22, 4:05 AM

0

Hello Jessica,

Experiencing a stiff or sagging rear suspension on a new 2023 BMW 750e xDrive with adaptive air suspension is definitely a cause for concern, even at 15,000 miles. Air suspension systems, while providing superior ride comfort, can develop issues that manifest as stiffness, sagging, or uneven ride height. Here's a breakdown of potential causes and what to do:

  1. Common Air Suspension Problems:

    • Air Spring (Air Bag) Leak: This is a very common issue. The rubber air springs can develop small leaks over time, especially in colder climates or due to manufacturing defects. A leak on one side would cause that side to sag and potentially feel stiff as it struggles to maintain pressure.
    • Air Compressor Failure: The compressor is responsible for supplying air to the springs. If it's failing or not working efficiently, it might not be able to inflate the springs to the correct pressure, leading to sagging or an inability to adjust ride height.
    • Height Sensor Malfunction: Each corner of the vehicle has a height sensor that tells the control module the current ride height. If a sensor is faulty, it might send incorrect readings, causing the system to over-inflate or under-inflate a particular air spring, leading to unevenness or stiffness.
    • Air Line Leak: The air lines connecting the compressor to the air springs can also develop leaks.
    • Control Module Issues: Less common, but the air suspension control module itself could have a fault, leading to incorrect operation.

  2. What to Look For:

    • Visually inspect the air springs (the large rubber bellows around the shock absorber) for any visible cracks, tears, or signs of air leakage (sometimes you can hear a faint hiss).
    • Observe if the vehicle consistently sags on one side or if the entire rear end is low.

  3. When to See a Shop:

    • Given your 2023 750e xDrive is a new vehicle with low mileage, this issue should absolutely be covered under your BMW factory warranty. Do not attempt to diagnose or repair this yourself, as it involves complex systems and potentially high-pressure air.
    • Schedule an appointment with your BMW dealership immediately. They have specialized diagnostic tools to read fault codes from the air suspension control module and pinpoint the exact component that has failed. Driving with a compromised air suspension can affect handling, tire wear, and overall safety, so prompt professional attention is crucial.
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