2011 Mazda CX-9 Service Brakes Problems

NHTSA component category: SERVICE BRAKES · data through 07/12/2026

97Service Brakes complaints

57.1%Of all 170 complaints

#1Most-reported category

Source: U.S. NHTSA complaint data. Complaints are unverified reports from vehicle owners — a complaint is not a confirmed defect.

How service brakes ranks on this vehicle

SERVICE BRAKES97 · 57.1%

POWER TRAIN25 · 14.7%

AIR BAGS22 · 12.9%

ENGINE15 · 8.8%

SUSPENSION6 · 3.5%

Share of the 170 complaints citing each category; one complaint can cite several. Full breakdown on the 2011 Mazda CX-9 overview page.

What owners report

“BRAKE PEDAL IS ROCK HARD AND TAKES IMMENSE PRESSURE TO PRESS DOWN TO GET BRAKES TO ENGAGE. HISSING NOISE COMING FROM UNDER DASH IT SEEMS.”NHTSA complaint 11151025 — filed 11/12/2018

“LOSS OF POWER BRAKES. EXCESSIVE BRAKE PEDAL PRESSURE NEEDED TO STOP VEHICLE. HISSING NOISE WHEN DEPRESSING BRAKE PEDAL.”NHTSA complaint 11139005 — filed 10/08/2018

“I WAS APPROACHING AN INTERSECTION WHERE I NEEDED TO STOP WITH MY CHILDREN IN THE CAR, I WENT TO HIT MY BRAKE PEDAL AND IT…”NHTSA complaint 11128392 — filed 09/10/2018

Excerpts are shortened and scrubbed of personal details; they are individual, unverified reports.

Service Brakes complaints by year filed

Frequently asked questions

Does the 2011 Mazda CX-9 have service brakes problems?

Service Brakes is the most-reported problem area on the 2011 Mazda CX-9: 97 of 170 complaints on file (57.1%). Complaints are unverified owner reports, not confirmed defects.

How many complaints does the 2011 Mazda CX-9 have in total?

170 complaints were on file with NHTSA as of 07/12/2026. Across all categories, 7 involved a crash, 3 involved a fire, 2 reported injuries, and none reported deaths.

What does NHTSA's service brakes category include?

NHTSA assigns each complaint to standard component categories; this page reports the SERVICE BRAKES category exactly as NHTSA defines and records it.

About this data — Complaint figures on this page are consumer reports submitted to the National Highway Traffic Safety Administration (NHTSA), a U.S. government agency. NHTSA does not verify individual complaints; a complaint is not proof that a defect exists, and counts reflect what owners chose to report, not confirmed failure rates. Recall information comes from official NHTSA safety recall campaigns; recall repairs are free at authorized dealers. Always check your specific vehicle by VIN at nhtsa.gov/recalls. CarModelProblems.com is an independent site and is not affiliated with NHTSA or any vehicle manufacturer. Data through 07/12/2026.