2007 Chevrolet HHR Transmission & Power Train Problems
NHTSA component category: POWER TRAIN · data through 07/14/2026
Source: U.S. NHTSA complaint data. Complaints are unverified reports from vehicle owners — a complaint is not a confirmed defect.
How power train ranks on this vehicle
Share of the 726 complaints citing each category; one complaint can cite several. Full breakdown on the 2007 Chevrolet HHR overview page.
What owners report
“2007 CHEVROLET HHR THE SHIFTER WILL NOT LOCK INTO GEAR AND KEY IS STUCK IN IGNITION. THIS IS A MAJOR SAFETY HAZARD AS SEEING WHILE…”NHTSA complaint 10371112 — filed 12/17/2010
“I PURCHASE A 2007 CHEVROLET HHR IN OCTOBER 2007. IT HAS BEEN IN THE SHOP 3 TIMES FOR KEY GETTING STUCK IN THE IGNITION AND…”NHTSA complaint 10232517 — filed 06/27/2008
Excerpts are shortened and scrubbed of personal details; they are individual, unverified reports.
Power Train complaints by year filed
Frequently asked questions
Does the 2007 Chevrolet HHR have transmission & power train problems?
Power Train is the #5 most-reported problem area on the 2007 Chevrolet HHR: 32 of 726 complaints on file (4.4%). Complaints are unverified owner reports, not confirmed defects.
How many complaints does the 2007 Chevrolet HHR have in total?
726 complaints were on file with NHTSA as of 07/14/2026. Across all categories, 42 involved a crash, 4 involved a fire, 28 reported injuries, and none reported deaths.
What does NHTSA's power train category include?
NHTSA groups complaints about the transmission (automatic or manual), driveline, axles, transfer case and related parts under a single component category called POWER TRAIN. This page reports that category as NHTSA defines it.
