The agency has received at least seven complaints from CX-9 drivers who claim to have lost assisted braking, requiring additional effort to stop the vehicle. Some of the reports note a hissing noise during brake application.
The latest investigation focuses on model-year 2010 through 2011 crossovers, though a previous inquiry focused on brake fluid leakage in 2008 models. The latter problem was not found to be widespread or dangerous.
The NHTSA will continue to monitor reports and determine if the issue warrants a formal recall.
In the meantime, an investigation into problems with stalling HEMI engines in some Chrysler 300s, Dodge Chargers and Dodge Magnums has been closed. The issue was found to be caused by swollen fuel-shutoff floats due to high ethanol content in certain fuels. Once swollen, the switch can stick in an open position and allow fuel to fill the purge line and consequently stall the engine.
Chrysler has extended the warranty period for affected fuel tanks, providing lifetime coverage to replace the defective shutoff float. The issue is said to be limited to 5.7- and 6.1-liter HEMI engines in 2005-2006 model-year vehicles.
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