Hello,
I have a 2020 Mazda 3 has an issue getting up to operating temp. Both of the coolant sensors agree, the car is running cold. Unless I drive aggressively, in 10-40F temps, it struggles to get above 140-160F when I have the heat on.
This is a fairly well known issue, and there’s a TSB for it. https://static.nhtsa.gov/odi/tsbs/2023/MC-10248393-0001.pdf
The issue is that to fix it under Powertrain warranty. they want the check engine light to be set. Apparently either mine is mild enough not to trigger the light, or I’m not driving in the correct way for it to go off.
To replace the parts myself would be about $500, and that’s with DIY labor, as this car uses a fancy electronic coolant valve with an integrated thermostat. There’s also the issue that some people are apparently having to have this repair done multiple times.
Would you do this on your own dime? I’m just picturing carbon building up on my intake valves and it’s bothering me I admit.
I’ve written corporate and done all of the advocacy I can for a warranty fix and I’m going nowhere.
I have a 2020 Mazda 3 has an issue getting up to operating temp. Both of the coolant sensors agree, the car is running cold. Unless I drive aggressively, in 10-40F temps, it struggles to get above 140-160F when I have the heat on.
This is a fairly well known issue, and there’s a TSB for it. https://static.nhtsa.gov/odi/tsbs/2023/MC-10248393-0001.pdf
The issue is that to fix it under Powertrain warranty. they want the check engine light to be set. Apparently either mine is mild enough not to trigger the light, or I’m not driving in the correct way for it to go off.
To replace the parts myself would be about $500, and that’s with DIY labor, as this car uses a fancy electronic coolant valve with an integrated thermostat. There’s also the issue that some people are apparently having to have this repair done multiple times.
Would you do this on your own dime? I’m just picturing carbon building up on my intake valves and it’s bothering me I admit.
I’ve written corporate and done all of the advocacy I can for a warranty fix and I’m going nowhere.