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Consider yourself lucky that 2013 CX-5 2.2L diesel lemon is gone and you have no chance to get it now. There’s no free lunch, and there’s always a reason why that diesel stayed unsold for a while with such a low price. Just too many major problems on this 2.2L diesel, camshaft wear、oil...

Based on the latest TSB 01-005/24 you’re correct that there’s a mechanical thermostat which is built into the coolant control valve. Although it looks different from those we usually see and it certainly is different from those “electrical thermostats” been used on Toyota’s. Luckily Mazda has...

Mazda has issued a Special Service Program D4!(SSPD4) on this “Check Engine Light ON with DTC P0126:00” problem with the thermostat stuck open on the 2.5L NA with CD as posted above. The SSP stated the warranty coverage for specific repair of the “fail-safe thermostat” in the coolant control...

Definitely! Although your $120 paid in Jan. 2021 will have much less buying power right now due to high inflation in recent years. “OWNER NOTIFICATION Mazda will notify all U.S. owners of the subject vehicles by first class mail no later than November 21, 2024. • Owners will be advised that...

So it looks like the problem started on 2017 CX-5, the first model year for gen-2. All gen-1 CX-5’s are fine.

In earlier days people were having this problem and been told by MNAO this expensive coolant control valve is NOT a normal mechanical thermostat hence it isn’t covered under powertrain warranty. See the thread posted above.

Another 2 recent cases here on newer 2021 / 2022 CX-5 2.5L NA with CD. Even though Mazda has been claiming in previous 2 TSBs since 4/22/2021: “To eliminate this concern, the production process of the coolant control valve has been modified.”, the coolant control valve problem seems to be...

Yes this’s a common problem for the 2.5L NA with CD. I believe you can post this problem under the proper thread here: 2019 CX-5 Coolant problem (CEL = P0126)