Where is the knock sensor on a SkyActiv 2.5L engine?

CombatSailor

2015 Mazda CX-5 Sport 2.5, 120k miles
Looking for where the knock sensor is on a 2015 Mazda CX-5 with a 2.5l engine. Any help is appreciated!
 
Solution
Finally got around to doing it. It's definitely under the intake. You have to pull the throttle body, intake, and I would recommend the radiator overflow (makes getting the intake out a ton easier).

Attached is a picture just because I never could find a picture.

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2014 mazda cx-5 touring FWD
When I cleaned the carbon from the throttle body,the throttle body gasket (identical to the OEM) from RockAuto was about $3 vs. $20 from Mazda.
 
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yrwei52

2016 Mazda CX-5 GT AWD w/Tech Pkg
Contributor
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Plano, Texas, USA
Maybe the price was for the intake manifold itself, that's too much for only a gasket. I paid about $30 for a genuine mazda valve cover gasket.
Did some research on OEM parts and the whole set of intake manifold with both gaskets costs much more than $100; but gaskets should be much cheaper.

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And got some related screenshots from felixd’s video:

Video Cleaning Intake valves CX 5 Skyactiv Gasoline engine

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And was wondering why a single red throttle body gasket is 3 times more expensive than 4 green intake manifold gaskets? :unsure:
 
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yrwei52

2016 Mazda CX-5 GT AWD w/Tech Pkg
Contributor
:
Plano, Texas, USA
It's $30 per intake gasket. There are 4 gaskets on your intake.
It’s confusing that the green intake manifold gasket(s?) PY01-13-111 comes with a set of 4 or not. Many Mazda online stores do show 4 gaskets but others show only one. Judging by the price of single red throttle body gasket I feel PY01-13-111 contains only one gasket? :unsure:


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yrwei52

2016 Mazda CX-5 GT AWD w/Tech Pkg
Contributor
:
Plano, Texas, USA
The ones I got from rock auto were singles. The dealer stated theirs were singles as well
That’s what I figured but the parts list from Mazda simply is not consistent. BTW, can you tell us how many miles has your original knock sensor lasted?
 
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yrwei52

2016 Mazda CX-5 GT AWD w/Tech Pkg
Contributor
:
Plano, Texas, USA
6 years and 120,000 miles
Honestly we haven’t seen many knock sensor failing here. I believe in your case you didn’t feel anything abnormal until you saw the CEL. At least you can DIY and all the time you spent for the job you can also clean up carbon deposits on throttle body、intake manifold、and intake valves as a preventive maintenance which we usually won’t do unless there’re obvious related symptoms.
 
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CombatSailor

2015 Mazda CX-5 Sport 2.5, 120k miles
Honestly we haven’t seen many knock sensor failing here. I believe in your case you didn’t feel anything abnormal until you saw the CEL. At least you can DIY and all the time you spent for the job you can also clean up carbon deposits on throttle body、intake manifold、and intake valves as a preventive maintenance which we usually won’t do unless there’re obvious related symptoms.
I don't think it's very common. I couldn't find a single thread or YouTube video for it. As you said, given the miles, it was a great excuse to clean up the engine a bit. This is my 3rd 2.5L. So far I've made 200k+ on each. This job should help me get there with this one.
 
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2018 Mazda CX-5 GT
I don't think it's very common. I couldn't find a single thread or YouTube video for it. As you said, given the miles, it was a great excuse to clean up the engine a bit. This is my 3rd 2.5L. So far I've made 200k+ on each. This job should help me get there with this one.
Hope my wife’s 2010 Mazda 3S 2.5L engine lasts that long. It only has 40k miles on it now.
 
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CombatSailor

2015 Mazda CX-5 Sport 2.5, 120k miles
Hope my wife’s 2010 Mazda 3S 2.5L engine lasts that long. It only has 40k miles on it now.
Change the oil. Don't beat it and 200k is easy to achieve. I have always wondered how much beyond that they would go but I never stuck it out past that. I drive way too many miles away from home to have a car let me sit.
 
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