Land Rover bulletin TUCC_AUG2025_37
What it saysWhen pushing the rear brake caliper pistons back during a brake service, the caliper piston dust boot may become twisted or distorted if a twist method is used to retract the piston. NHTSA’s full summary ↓
Land Rover filed this with NHTSA as a manufacturer communication dated Aug 15, 2025, received Sep 3, 2025, about the service brakes. It names 13 model years (2017–2025). A manufacturer communication 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 communicationWhen pushing the rear brake caliper pistons back during a brake service, the caliper piston dust boot may become twisted or distorted if a twist method is used to retract the piston.
Document filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| TUCC_AUG2025_37 | Other | Aug 15, 2025 | 11022472 | PDF, 159 KB |
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 themA 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 13 model years this bulletin names have filed 661 complaints with NHTSA since 2015. 22 of them name Service Brakes — 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.
I am reporting a severe safety hazard regarding the braking and electronic parking brake system on my 2023 Range Rover Sport. Whenever the vehicle is exposed to significant moisture—such as immediately following a standard car wash or after sitting parked outside in humid or rainy conditions for 1 to 2 days—the brakes severely lock and…
2023 Land Rover Range Rover · Service Brakes · filed with NHTSA Jul 31, 2026 · ODI 11753987
At 613 miles, this 2025 Land Rover Range Rover SE experienced simultaneous brake fluid loss from the rear right wheel area, partial loss of engine power, and multiple warning lights including “Stability Control Not Available” and “Restricted Performance.” The vehicle required emergency flatbed towing.
2025 Land Rover Range Rover · Service Brakes · filed with NHTSA Jun 14, 2026 · ODI 11744050
I purchased a 2022 V8 after waiting about a year to get the vehicle. It mostly has been a good car until recently. I was pulling into my garage, which has a downhill grade, and there was ice on the surface of the driveway and subsequently slid into the corner of my garage going no more than 3-5 mph.
2022 Land Rover Defender · Service Brakes · filed with NHTSA Jan 21, 2023 · ODI 11502902
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 service brakes
Source: same model, same component group18 other manufacturer communications filed against these Land Rover models under the same component group (service brakes), newest first. The eight newest are listed; the rest are on the Land Rover list.
| Number | Kind | Dated | NHTSA’s summary |
|---|---|---|---|
| SSM76509 - 14SEP26 | Other | Sep 14, 2026 | Integrated Power Brake (IPB) Unit Humming / Buzzing Noise |
| SSM76375ATT2 - 04AUG25 | Other | Aug 4, 2025 | Rear Brake Caliper Piston Dust Boot Distortion Risk |
| SSM76375ATT1 - 04AUG25 | Other | Aug 4, 2025 | Rear Brake Caliper Piston Dust Boot Distortion Risk |
| SSM76375 - 04AUG25 | Other | Aug 4, 2025 | Rear Brake Caliper Piston Dust Boot Distortion Risk |
| SFCC_MAR2025_20 | Other | Mar 14, 2025 | There have been several FRED submissions for a customer allegation of brake judder/vibration. |
| SFCC_MAR2025_18 | Other | Mar 14, 2025 | There have been several FRED submissions for a customer allegation of a brake noise concern. |
| SFCC_MAR2025_17 | Other | Mar 14, 2025 | There have been several FRED submissions for a customer allegation of a rear brake warning being illuminated on the instrument cluster. |
| N983 UPS1025-3 | Service bulletin | Feb 25, 2025 | CLOSED - Rear Brake Caliper Motor Gear Unit Weld Issue |
Quote the number at the service desk. It is what the dealer’s system is keyed on.
Every manufacturer communication NHTSA holds for Land Rover, by the number printed on the letter.
Common questions
Source: NHTSA, 49 CFR 579.5Is Land Rover TUCC_AUG2025_37 a recall?
No. A manufacturer communication 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 TUCC_AUG2025_37 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.
Which vehicles does TUCC_AUG2025_37 cover?
The manufacturer filed it against 13 model years: 2025 Land Rover Defender, 2024 Land Rover Defender, 2023 Land Rover Defender, 2022 Land Rover Defender, 2021 Land Rover Defender, 2020 Land Rover Defender and more. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.