Cylinder Deactivation Solenoid

2025 Mazda CX-50

This problem may be covered under warranty. Ask your Mazda dealer.

10.0

really awful
Typical Repair Cost:
No data
Average Mileage:
1,200 miles
Total Complaints:
1 complaints

Most Common Solutions:

  1. requires new head (1 reports)
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2025 Mazda CX-50 engine problems

engine problem

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2025 Mazda CX-50 Owner Comments

problem #1

Jan 242025

CX-50 2.5s Premium 2.5L 4 cyl

  • Automatic transmission
  • 1,200 miles

A D V E R T I S E M E N T S

Check engine light at 600 miles, P3400 code. Dealership replaced the cylinder deactivation solenoids and found metal shavings. I changed the oil and used an oil filter cutter to cut open the oil filter. Found large metal shavings in filter. Mazda's response to the large amount of metal in the filter was "filter did its job". At 1200 miles the same check engine code illuminated, the P3400 code again, back to the dealership. Mazda now advises to replace the head. Brand new car that is now getting the upper half of the engine rebuilt. Avoid this car like the plague.

- lolabear1, Cameron, US

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