Investigations
Idler Pulley Bolt Failure
NHTSA Recall Query RQ18001 — closed, opened 2018-04-18 and involving the BMW BMW.
NHTSA investigation RQ18001 is a Recall Query opened on 2018-04-18 and currently closed. The subject of record is BMW BMW, which places this file inside the Office of Defects Investigation queue for BMW. Latest activity on this investigation was logged on 2018-12-01 — NHTSA updates that field whenever an Information Request goes out, a supplement is filed, or a status change is recorded in the public docket.
A Recall Query like RQ18001 evaluates whether a previously issued recall is actually fixing the problem. NHTSA opens an RQ when owners continue to report the original defect after the recall remedy is installed, or when completion rates fall short of the agency's expectations for that risk tier.
Investigators summarized the matter as follows: "In a May 23, 2018 letter, BMW of North America, LLC (BMW) notified the National Highway Traffic Safety Administration (NHTSA) of a safety defect that may result in the loss of power steering assist in certain model year..." Investigations are the early-warning layer of the federal auto-safety system, sitting upstream of formal recalls and defect orders. Whether this one closes without action or escalates into an Engineering Analysis, the full history stays in the ODI archive so researchers, litigators, and buyers can pull the paper trail at any time. Related BMW files, listed below, give context on whether this is an isolated concern or part of a broader pattern across the brand.
Investigation Summary
In a May 23, 2018 letter, BMW of North America, LLC (BMW) notified the National Highway Traffic Safety Administration (NHTSA) of a safety defect that may result in the loss of power steering assist in certain model year (MY) 2009 through 2013 BMW X5 xDrive35d vehicles (Recall 18V-336). The recall, which affects approximately 33,214 vehicles built from March 12, 2008 through June 27, 2013, corrects the remedy and expands the scope of a prior BMW recall (12V-550) which addressed idle pulley bolt failure in approximately 29,800 MY 2009 through 2012 BMW X5 xDrive35d vehicles built from September 1, 2008 through November 15, 2012. BMW's analysis indicates that due to a number of contributing factors it is possible that the bolt's pre-stressing force could drop to an extent that it results in the bolt becoming loosened over time. A loosening of the bolt could cause additional bending stress on top of the bolt. As a result, the bolt could break. If this were to happen, then a sudden loss of power steering assist could occur. If there were a loss of power steering assist, manual steering capability would be retained, although the effort required to steer the vehicle would be greater, and therefore may increase the risk of crash. ODI's analysis of the complaints it has received from the public (VOQ's) and BMW complaint data submitted in response to the information request letter for RQ18-001 identified a total of 93 unique VIN reports alleging failure of the idler pulley bolt after recall 12V-550 was completed on the vehicle, including 31 VOQ's and 72 BMW consumer complaints (5 complaints received by NHTSA and BMW, 3 unique VIN's submitted multiple complaints to BMW, and 1 unique VIN submitted multiple complaints to NHTSA). BMW is developing a new idler pulley fastening system as the remedy for 18V-336. The remedy is planned to begin in February 2019. Based on BMW's safety recall, this recall query is closed. The 31 VOQ's referenced in this resume are: 10499780, 10559422, 10
About This Investigation Type
A Recall Query (RQ) evaluates the effectiveness of a previously issued recall. NHTSA opens an RQ when consumer complaints suggest that a recall remedy may not be adequately addressing the safety issue, or when the recall completion rate appears insufficient.
Other BMW Investigations
Brake fluid leak at front brake caliper
Steering Oscillation
Steering Oscillation
BMW Safety Act Violations
Loss of power assist braking
Data from NHTSA Office of Defects Investigation. Cross-references: NHTSA recall campaign API and NHTSA FARS where fatality records overlap. PlainCars does not rate or recommend vehicles. Learn more.
Read our methodology — how this data is sourced, computed, and verified.