# Emissions B120326

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

- Type: Emissions
- NHTSA id: 11035396
- Published by NHTSA: 2026\-07\-31
- Manufacturer's number: B120326
- Manufacturer's date: 2026\-07\-10
- Campaign id or software version: 0099020300
- NHTSA component: ENGINE

## NHTSA's summary

Due to an implementation error in various OBD diagnostics in the vehicle's control units, in very rare cases itmay happen that stored fault memory codes \(DTCs\) and the MIL \(warning light\) are not automaticallydeleted even though the underlying malfunction has already been rectified. This does not comply with the statutory OBD specifications.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2026/MC-11035396-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2026/MC-11035396-9999.pdf)

The document is the manufacturer's. This site does not hold it.

## Components

Engine

## Vehicles listed

- 2023 to 2026 BMW 230I
- 2023 to 2026 BMW 530I
- 2023 to 2026 BMW 740I
- 2025 to 2026 BMW M5
- 2023 to 2026 BMW X1
- 2023 to 2026 BMW X2
- 2023 to 2026 BMW X3
- 2023 to 2026 BMW X5
- 2023 to 2026 BMW X6
- 2023 to 2026 BMW X7
- 2023 to 2025 BMW XM
- 2026 BMW XM LABEL

## Recalls for the same vehicles and component

- [2026331](/recalls/tc/2026331.md), 2026-07-08: Engine
- [2026040](/recalls/tc/2026040.md), 2026-01-30: Engine
- [23V294000](/recalls/nhtsa/23V294000.md), 2023-04-26: ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:CATALYTIC CONVERTOR

## Other bulletins for the same vehicles and component

- [B121126](/bulletins/11037505.md), 2026-09-28, Service bulletin: ENGINE. Potential customer complaints with no fault codes stored / No MIL displayed. 1. “Rough idle after idling for a longer period of time” 2. “Vehicle feels like it is misfiring at idle” The automatic Start/Stop function is deactivated. The vehicle is stopped and the engine runs at idle speed. After prolonged idle operation \(approximately 30 to 50 seconds\), a slight jolt or slight change in idlespeed may be noticeable. There are no relevant errors in the DME fault code memory. No mixture control error, no misfiring, no error relating to a relevant component of the drive system. Motor vehicles affected: 1. Only MHEVs \(mild hybrid electric vehicle\) with crankshaft\-driven starter generator. 2. Only vehicles with optional equipment 01CE = recuperation system 3. Affected I\-levels: I\-level 24\-07\-500 or higher
- [B130126](/bulletins/11036551.md), 2026-09-01, Service campaign: ENGINE. Delivery Stop \- Exhaust System Gasket
- [B064426](/bulletins/11036436.md), 2026-08-28, Other: ENGINE. Air Flap Return
- [B064126](/bulletins/11036432.md), 2026-08-28, Other: ENGINE. Fan Return
- [B180126](/bulletins/11036378.md), 2026-08-26, Service campaign: ENGINE. An exhaust gas sealing ring between thelower catalytic converter and upper catalyticconverter may be missing \(1\).
- [B110723](/bulletins/11036377.md), 2026-08-26, Emissions: ENGINE. The return springs on the exhaust camshaft followers \(switchable rocker arm\) may break.
- [B110326](/bulletins/11036376.md), 2026-08-26, Service bulletin: ENGINE. This Service Bulletin provides instructions to clean the intake valves using the BMW Carbon Blaster Tool P/N 81 29 2 208 034 and the S68T / XB1T Kit P/N 83 30 5 BAD 3D5. Refer to SI B04 12 11 for existing documentation about the carbon blaster tool and SI B04 02 26 for the S68T /XB1T tool kit.
- [B010324](/bulletins/11035497.md), 2026-08-03, Warranty extension: ENGINE. The EVAP systems purge \(vent\) valve limited warranty for defects in materials and / or workmanship has been extended to 15 years / 150,000 miles as determined from the original first in\-service / delivery date.
- [B010224](/bulletins/11035496.md), 2026-08-03, Warranty extension: ENGINE. The EVAP systems purge \(vent\) valve limited warranty for defects in materials and / or workmanship has been extended to 15 years / 150,000 miles as determined from the original first in\-service / delivery date.
- [B063926](/bulletins/11035476.md), 2026-08-03, Other: ENGINE. Starter Generator Return

JSON: [/v1/bulletins/11035396](/v1/bulletins/11035396)

[Report an error on this page](https://github.com/wenmar-pro/wenmar-open/issues/new?template=data_correction.yml&title=Data%20correction%3A%20Emissions%20B120326&page=https%3A%2F%2Fopen.wenmarpro.com%2Fbulletins%2F11035396&vehicle=Emissions%20B120326)