There are 4 owner-reported fuel system complaints for the 2007 Mazda CX-7in NHTSA's database. These are unverified consumer reports and may not reflect confirmed defects.
FAULTY FUEL RAIL CAUSING THE VEHICLE TO NOT ACCELLERATE
THE TIMING CHAIN TENSIONERS & BEARINGS THAT KEEP THE CHAIN TIGHT WEAR OUT WAY BEFORE THEIR LIFE SHOULD BE UP. I TOOK THE CAR TO THE MAZDA DEALERSHIP TO HAVE IT LOOKED AT & THE SHOP TECHNICIANS SAID THEY GET THIS PROBLEM WITH THESE CARS ALL THE TIME. ALL THEY HAD TO DO WAS LISTEN WHEN THE CAR WAS STARTED & THEY KNEW EXACTLY WHAT THE PROBLEM WAS. EVEN BEFORE GOING IN I CALLED & SPOKE TO A SERVICE TECH. AS SOON AS I SAID "MY CAR SOUNDS LIKE A DIESEL VEHICLE HE SAID OVER THE PHONE THAT THE PROBLEM WAS WITH THE TIMING CHAIN TENSIONERS AND SUCH. HE ALSO SAID MANY OF THE SAME CARS COME IN WITH THE SAME PROBLEM & HE COULDN'T UNDERSTAND WHY THERE WASN'T A RECALL ON THIS. THAT IS WHY I AM WRITING TO YOU. THE SOUND OCCURS WHEN THE ENGINE IS RUNNING REGARDLESS OF IF WE'RE IN MOTION OR NOT. IF YOU PUT MAZDA CX-7 SOUNDS LIKE A DIESEL IN A BROWSER SEARCH YOU WILL GET MANY RESULTS REGARDING THE TIMING CHAIN ISSUE.
CHECK ENGINE LIGHT CAME ON. AFTER LIGHT CAME ON, NO POWER WHEN PRESSING GAS PEDDLE. SHUT OFF ENGINE AND RESTARTED ENGINE. LIGHT STILL ON BUT HAD POWER. DROVE TO REPAIR SHOP AND HAD ENGINE DIAGNOSED. THROTTLE BODY HAD TO BE REPLACE. OLD PART IS NOT AVAILABLE. *TR
FUEL SYSTEM PROBLEMS CAUSES THE "SERVICE ENGINE LIGHT" TO COME ON OFTEN. *TR
Complaints are unverified consumer reports submitted to NHTSA. A high complaint count may reflect vehicle popularity, not defect severity. Data sourced from NHTSA public records.
Data synced from NHTSA on Apr 25, 2026