For those who have changed them, are there any preferred brands (or are they the same regardless?), I have a 2010 HHR 1LT 2.2L .

Thanks,
Mike

 

Why would you want to change them? You haven't had any problem with them, and they often will last the life of the vehicle.

 

I’ve not had to change them in 260,000 miles. No codes no change!

 

Some say that changing them after putting some high mileage on them, will show an improvement in gas mileage. How much of an improvement is unknown - as some people reported that their mileage dropped after changing the sensor(s).

So really, why bother changing them? They aren't cheap, and any benefits are marginal at best, and troublesome at the worst.

I kind of liken it to changing good serviceable tires over to low rolling resistance tires at a cost that will never be recovered. Consumer reports for example say that one will gain a 1-2 mpg difference when swapping between relatively high and low-rolling-resistance all-season tires on their test car. That just does not make sense $-wise.

 

I'm just making a list of parts, part #, brands, etc. that you long timer HHR owners would recommend when and if the time comes......not changing them until needed.
I've been copy n pasting all the info from this site unto a txt file just in case I have to shut down my internet if cost gets to high......just preparing that's all. Still thanks for the heads up, just in case I was doing it just to do it.....Hell of a lot of great info here to keep my hands on..

 

On that theory , how many miles must one drive their Tesla to warrant the price tag?

 

I ask myself "if I were wealthy, would I buy a Tesla" I know I'd buy some (well, more than some) collectible guitars ! Oh! and build me a state of the art (analog..lol) recording studio !

 

Moved since I see no part numbers.

I thought I answered that question in another thread?

The factory uses NGK/NTK rebranded to ACDelco. Avoid Bosch.

Changing the #1 sensor might improve MPG a bit, since it is responsible for the A/F ratio. The #2 sensor monitors the performance of the cat.

 

Great in-depth info, Thanks.....perfect for my info-txt collection.

 

I had a code about the #2 sensor (2.2L) so I searched for a replacement. NGK was the only one I could source that called itself a 'downstream' sensor (the one I needed) in the part description.
It was priced fair and it has worked fine.
I think it was corrosion that took it out, it looked pretty bad- we have salted roads here all winter and the #2 is down near the slop.