Worst 2008 Mazda CX-7 Problems #1: Engine Failure 2008 CX-7 Average Cost to Fix: $5,000 Average Mileage: 107,000 mi. Learn More #2: Turbocharger Failed 2008 CX-7 Average Cost to Fix: $4,500 Sep 10, 2022 · 3. Bad Fuel Economy. Another symptom of wastegate stuck on closed is a poor fuel economy. Your engine will consume more without actually being burned. The fuel will be expelled through the exhaust system. The turbo system is a great way to improve the fuel consumption of your vehicle. Once you notice that your vehicle consumes more fuel than May 23, 2022 · Top Mazda CX-7 Problems. Failure Turbocharger. The turbocharger in the Mazda CX-7 is widely known to be prone to failure, resulting in a lack of power and acceleration. In addition to the lack of acceleration and power, another symptom of a failed turbo is white smoke coming from the exhaust. The turbo appears not to be the only major weakness of the petrol 2.3L CX7. Another is a problem with the timing chain and over-revving of the VVTi engine, as well as excessive heat build up. Additionally, owners complain of poor mileage from the vehicle even on open road / highway driving from the turbo 2.3L engine. Aug 9, 2020 · 2007 Mazda CX 7 engine problems. Unfortunately, most reported 2007 Mazda CX 7 problems have to do with the engine, which requires very high repair costs and might suggest staying away from this vehicle. 2007 Mazda CX 7 engine problems are either related to issues with the engine timing chain, turbo problems, power loss, ticking noise, and others. Dec 19, 2018 · EGR valve failures causing the code P0401 were common in the Mazda CX-7 vehicles with a 2.3L turbo engine. In many Mazda/Ford 4-cylinder engines, the code P0401 can be caused by a sticking EGR valve. The EGR valve must be replaced to repair the problem. Not all EGR problems are caused by a failed EGR valve. .

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