There are 4 stored owner reports matching the fuel system leading-label group for the 2007 Mazda CX-7 in our NHTSA-sourced dataset. These are unverified consumer reports and may not reflect confirmed defects.
This group counts stored reports whose component label starts with one of this site's matching prefixes, ignoring case. Each matching report counts once within the group. Components mentioned later in the label or only in the narrative are not searched. How component counts work
Loaded 4 of 4 matching reports.
Open the full vehicle complaint log (all categories)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.
NHTSA source checks for this vehicle year
Checks are recorded separately for each dataset, not for the whole page. Dates use UTC. A missing check date does not mean no records exist.
Vehicle import recorded: Apr 28, 2026. This is the stored import date, not confirmation that every source was successfully refreshed.