Service bulletin B121008
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 | Service bulletin |
|---|---|
| NHTSA id | 10146708 |
| Published by NHTSA | 2018-11-05 |
| Manufacturer's number | B121008 |
| Manufacturer's date | 2017-06-01 |
| NHTSA component | ENGINE; EQUIPMENT |
NHTSA's summary
"AFTERMARKET ""ENGINE PERFORMANCE TUNING"" KITS This Service Information bulletin replaces SI B12 10 08 dated May 2017 What's New: Diesel engine equipped vehicles added. INFORMATION None of the aftermarket ""Engine Performance Tuning"" kits has been evaluated, tested, approved or endorsed by the BMW Development or Service Departments. Any alterations to the originally designed and installed turbochargers control system or to the DME software may increase a vehicle's emission levels and may compromise its OBD II compliance. Moreover, to the best of BMW NA knowledge, none of the aftermarket ""Engine Performance Tuning"" kits have been certified (homologated) by the appropriate federal and state authorities (EPA/CARB) to meet street-legal emission requirements. BMW vehicles equipped with such ""performance enhancement devices"" without these certifications are not in compliance with EPA/CARB emission anti-tampering laws. Excessive turbocharger boost increases engine temperatures resulting in pressures and forces which may damage engine internal components and or may cause premature turbochargers failure. Due to increased engine output and the altered emissions characteristics, severe damage may be inflicted on emission control components, such as oxygen sensors and catalytic converters. Excessive engine loads, above the designed levels, may also compromise long term reliability and longevity of other drivetrain components, such as: clutch transmission, automatic transmission torque converter and clutch packs, transfer case, differentials, etc. Note: BMW NA Technical Service will not offer any technical support or advice on the repair of engines modified by a third party ""tuner kit""."
The document
The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.
Components
Engine, Equipment and accessories
| BMW K SERIES |
|---|
Listing a model year does not mean every vehicle of it is concerned: the document says which.