meh....this is a hard one . If you read up online , they were hit and miss as far as reliability and issues. They were built cheap on a cheap economy car platform.
They had a variety of water leaks. Repairpal seems to think they are reliable, but they still have their issues with engine, transmission...electrical glitches, poor visibility.
Some owners may have lucked out and got a reliable vehicle (or at least they were very good owners) , but if you go on Reddit and do a search, many owners have issues or say to not buy a used HHR.
Definitely not built to last such as a Toyota Corolla or Camry or even an older Mazda/Subaru.
I'm not totally hating on the HHRs...I actually was secretly wanting to buy one new when they first came out. Even more so when the turbo HHR came out! I ended up buying a two door 2004 Honda Si manual that I kept till 2015! Super reliable vehicle.
But as the years rolled by , I kept watching the HHR YouTube vids, scrolled the HHR forums, Reddit, blah blah.....the HHr seemed to me to be too problematic, and I was spoiled by my Honda Civic and other Japanese vehicles I owned before and after.
Something to keep in mind...how many 2005-2011 HHrs do you see driven around your city ? In my city , Vancouver Canada with a nearly 3.5Million metro population, the HHR is rarely ever seen anywhere....it is a unicorn. Old hondas/toyotas/Nissans/Subarus/ are a dime a dozen. The HHR was built to compete with the PT Cruiser (another rare unicorn/rolling junk) and I believe they were built much like the previous disposable GM vehicles such as the Cavalier/Sunfire/Fiero. Or the Dodge Neons, Stratus etc. Vehicles built for affordability for young drivers or people who just wanted A to B transportation. Vehicles that end up in junkyards after only 10 years or maybe less.
I'd say do your HHR road tests, even go to a used car lot if you find one for sale. Watch HHR YouTube videos, etc. In the end, if the vehicle makes you smile whenever you see it/drive it, and despite whatever flaws, buy it , live and learn. Might be a fine little compact , might be a little money pit.
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https://www.carparts.com/blog/chevr...WaF3lb4IB_YYexeMp39EIrKmtzfRLlu2QeAVDcpEsNPh9
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https://www.autoevolution.com/chevrolet/hhr/
having told you all this, I might still one day buy a well looked after HHR if the price was right . What do I know???? lol.