BMW bulletin B310122
What it saysDuring inspection and/or diagnosis there is noticeable dirt/grease buildup on the axles near the inner and/or outer CV boots. NHTSA’s full summary ↓
BMW filed this with NHTSA as a service bulletin dated Jan 3, 2026, received Jun 21, 2022, about the suspension — 4 documents under this number. It names 47 model years (2017–2024). A service bulletin is not a safety recall: it is the manufacturer telling its dealers how to diagnose or repair a condition, and whether the work is paid for depends on the warranty in force. Quoting the number at a service desk can save a diagnosis.
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What the bulletin says
Source: NHTSA's summary of the manufacturer's communicationDuring inspection and/or diagnosis there is noticeable dirt/grease buildup on the axles near the inner and/or outer CV boots.
Documents filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| B310122 | Service bulletin | Jan 3, 2026 | 11027761 | PDF, 667 KB |
| B310122 | Service bulletin | Sep 24, 2024 | 11008106 | PDF, 623 KB |
| B310122 | Service bulletin | Mar 14, 2024 | 10252033 | PDF, 623 KB |
| B310122 | Service bulletin | Feb 1, 2022 | 10214258 | not found |
The summary is NHTSA’s abstract of the document, as filed under 49 CFR 579.5. One communication is usually filed as several documents — the bulletin, a dealer notice, an owner letter — and the number on any of them finds this page. A PDF link is shown only once NHTSA’s own server has been seen to serve that document; the rest are checked over the following nights. Quote the number at a service desk; it is what the dealer’s system is keyed on.
Model years it names
Source: as the manufacturer filed themand 6 more on this site: 2024 BMW X7, 2023 BMW X7, 2022 BMW X7, 2021 BMW X7, 2020 BMW X7, 2019 BMW X7.
Also filed against model years this site has no page for: 2021 BMW XB7.
A vehicle page’s bulletin list shows the newest few communications filed against that model year; the count there is every one.
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What owners reported
Source: NHTSA complaint databaseOwners of the 46 model years this bulletin names have filed 1,970 complaints with NHTSA since 2015. 14 of them name Suspension — the same broad component group this bulletin is filed under. NHTSA groups complaints coarsely, so that means the same area of the vehicle, not necessarily the same fault.
What component or system failed or malfunctioned, and is it available for inspection upon request? - Suspension How was your safety or the safety of others put at risk? - Its giving head ache and body pain, driver & passengers are jumping / shaking / feeling very uncomfortable Has the problem been reproduced or confirmed by a dealer or…
2021 BMW X4 · Suspension · filed with NHTSA Feb 16, 2023 · ODI 11507631
My vehicle was diagnosed in August of 2026 with a suspension thrust arm failure showing leaking hydraulic fluid. The repair cost was quoted at $2,200.00. I found on the internet a BMW of north america service bulletin that called out these thrust arms can fail due to "Various external influences can cause premature aging of the tension…
2022 BMW X7 · Suspension · filed with NHTSA Sep 3, 2026 · ODI 11761805
X7 models from year 2020 -2022 have a particular issue at stake which is a manufacture default as it's been reported in many cases in X7 models. I'd like have this Transportation safety to please look into this issue a safety recall as there is a shuddering issue in most x7's when turning right or left at a lower speed which slips the…
2020 BMW X7 · Suspension · filed with NHTSA Aug 5, 2025 · ODI 11678527
A complaint is one owner’s account, not a defect finding, and a bulletin is not a recall. Nothing here says this bulletin was issued because of these complaints, or that the repair it describes fixed them. Complaint files on this site begin in 2015.
More bulletins about the suspension
Source: same model, same component group14 other manufacturer communications filed against these BMW models under the same component group (suspension), newest first. The eight newest are listed; the rest are on the BMW list.
| Number | Kind | Dated | NHTSA’s summary |
|---|---|---|---|
| B064726 | Other | Sep 15, 2026 | Carrier Return |
| B330126 | Service bulletin | Mar 2, 2026 | 1. Noise complaint: Humming or clicking type noise in the speed range of 15 – 65 mph can be heard from the rear axle. Seeattached video “V33… |
| B330125 | Service bulletin | Feb 23, 2026 | “Rattling” noises heard from the area of the luggage compartment when driving over a rough road surface. See attached video V33 01 25 “Rear… |
| B310326 | Service bulletin | Feb 23, 2026 | Various external influences can cause premature aging of the tension strut hydro-mount elastomer; which can lead to cracks in the material… |
| B510326 | Service bulletin | Feb 17, 2026 | While driving on rough surfaces, a “creaking” noise can be heard from the B-pillar trim panels. |
| B310126 | Service bulletin | Feb 4, 2026 | When driving over an uneven road surface, a “thumping” noise can be heard from the front axle. Seeattached video V 31 01 26. Under certain w… |
| B310226 | Service bulletin | Jan 17, 2026 | When driving over a bump (compression and rebound), a “click”-type noise may occur in the area of thefront axle. The noise can be heard on t… |
| B064625 | Other | Sep 5, 2025 | Control Arm Return |
Quote the number at the service desk. It is what the dealer’s system is keyed on.
Every manufacturer communication NHTSA holds for BMW, by the number printed on the letter.
Common questions
Source: NHTSA, 49 CFR 579.5Is BMW B310122 a recall?
No. A service bulletin is a manufacturer communication filed with NHTSA under 49 CFR 579.5; a safety recall carries an NHTSA campaign number (two digits, a letter, six digits) and a federal duty to repair for free. Check the vehicle’s recalls by VIN at nhtsa.gov/recalls, or on its page here.
Is the B310122 repair free?
Not automatically. A service bulletin describes how to diagnose or repair a condition; who pays depends on the warranty in force, any extension, and the dealer. Quoting the number can save a diagnosis either way. Every BMW warranty extension on file lists the ones BMW has filed.
Which vehicles does B310122 cover?
The manufacturer filed it against 47 model years: 2022 BMW 2 Series, 2024 BMW X1, 2023 BMW X1, 2022 BMW X1, 2024 BMW X2, 2023 BMW X2 and more. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.