NHTSA Office of Defects Investigation
Preliminary Evaluation PE19-001: Roof Skin Separation While Driving
- Closed
NHTSA's Office of Defects Investigation opened Preliminary Evaluation PE19-001 on February 1, 2019 and closed it on December 12, 2019. NHTSA's investigations file lists the 2004–2005 Cadillac XLR for it.
Updated daily from NHTSA's investigations file
Key facts
- NHTSA number
- PE19-001 (also written PE19001)
- Investigation type
- Preliminary Evaluation The first stage of most defect investigations: NHTSA's Office of Defects Investigation gathers basic information about a possible safety defect, including from the manufacturer.
- Status
- Closed December 12, 2019
- Opened
- Closed
- Vehicle or equipment manufacturer
- General Motors, LLC
- Component
- Structure — Body — Roof and Pillars
- Vehicles and equipment
- 2004–2005 Cadillac XLR
A recall appears here only when NHTSA's investigations file links one to the investigation; NHTSA's summary or record can name others.
NHTSA's summary
As NHTSA's Office of Defects Investigation wrote it for Preliminary Evaluation PE19-001.
On August 23rd, 2018 - the Office of Defects Investigation (ODI) received a media inquiry pertaining to a motorist experiencing separation of the roof skin from their Cadillac XLR while driving.
Based on the data in-hand at that time and a subsequent (December) consumer complaint, ODI opened PE19-001 on February 1, 2019 to evaluate the scope of this condition in the 2004 - 2005 XLR population.
The subject vehicle model is a two-seat roadster equipped with an electrically powered retractable roof system. The outer roof skin is a Sheet Molded Composite (SMC) which is adhered to the magnesium alloy roof frame.
ODI's February 7, 2019 Information Request (IR) letter to General Motors (GM) covered the entirety of XLR production: MY 2004 - 2009. GM's March 21, 2019 IR response attributed the separations to an unexpected oxide layer on the magnesium framework. A total of eight separations were identified, six of which coincided with consumer complaints to NHTSA. Separations occurred at two per calendar year with the most recent taking place in late 2018.
An additional twenty-one noise, fit/finish/ functionality claims were identified that did not lead to separations.
ODI compared the separation rate in the subject vehicles to those in to two roof skin separation safety recalls involving the Corvette (06V181: 2005 - 2006 Corvette; 09V491: 2005 - 2007 Corvette) to find that the subject vehicles took over ten years of exposure to reach the failure rate that triggered the 06V181.
Since PE19-001 opened, ODI has received only one additional consumer complaint which reported wind noise symptoms. The complainant has not responded to outreach efforts by ODI or GM.Based on a low failure rate, sporadic occurrence, and high detectability of the alleged defect in the subject vehicles, this investigation is closed. Further use of agency resources on this matter is not warranted. The closing of this investigation does not constitute a finding by NHTSA that a safety-related defect does not exist in the subject vehicles.
The agency reserves the right to take further action if warranted by the circumstances. The ODI complaints cited above can be viewed at www.nhtsa.gov under the following ODI identification numbers: Separations: 11155574, 11101657, 11012176, 11012166, 10970736, 10970383, 10653304Note: ODI 11012176 & 11012166 pertain to the same incidentNot Separated: 11243947, 11194359, 11176647, 11173362, 11074433, 10985013 Note: 11176647 & 10985013 pertain to the same incident
Vehicles and equipment listed for this investigation
NHTSA's investigations file lists these vehicles and equipment for Preliminary Evaluation PE19-001. A listed model year means only that an investigation names it; it says nothing about any particular vehicle. Model years with a try.vin recall page link to that page's NHTSA investigations section.
Cadillac
All Cadillac recallsWhat an NHTSA investigation is
NHTSA's Office of Defects Investigation (ODI) looks into possible safety defects in vehicles and equipment, often after owner complaints. An investigation usually starts as a Preliminary Evaluation, or as a Recall Query when it concerns whether an existing recall covers the right vehicles or fixes the problem, and ODI can upgrade it to a more detailed Engineering Analysis. A Defect Petition asks NHTSA to open an investigation, and Audit and Equipment Queries are administrative investigations into whether companies complied with federal vehicle safety requirements, such as reporting, recall and certification rules.
An open investigation is not a finding that a safety defect exists, and NHTSA can close one without a recall.
To see whether a specific vehicle has an open recall, enter its VIN at nhtsa.gov/recalls.
Cadillac VIN check: decode a VIN to see its year, make and model.
Sources
NHTSA's investigation record for PE19-001
Investigation details come from NHTSA's investigations file, which try.vin imports once a day. The investigation types are described from the U.S. Department of Transportation Inspector General's May 2023 report on NHTSA's Office of Defects Investigation, NHTSA's petition rules (49 CFR Parts 552 and 557) and NHTSA's Office of Defects Investigation procedures. How try.vin reads NHTSA investigations.