2012 Mazda CX-9: engine stalls while driving

Filed Jul 13, 2023 · Suspension · 11,000 miles · PA · crash

The contact owns a 2012 Mazda CX9. The contact stated that the vehicle had previously been involved in a crash due to a fractured passenger's side lower control arm. The dealer was made aware of the failure and confirmed that the vehicle had been repaired under the federal safety agency Campaign Number: 15V451000 (Suspension). The dealer referred the contact to the manufacturer for assistance. An independent mechanic replaced the passenger's side lower control arm; however, the contact stated that after the repair was performed, the engine rattled and the vehicle stalled. The vehicle was then taken back to the independent mechanic, who determined that the driver's side lower control arm spacers were missing and that the front and rear axles, brakes, and rear shocks needed to be replaced. Additionally, the cage bolts needed to be retightened. The vehicle was not repaired. The manufacturer was made aware of the failure, and a case was opened. The failure mileage was approximately 110,000.

Filed Aug 18, 2022 · Brakes · NJ

The brakes suddenly became very difficult to press as if I did not have power brakes. No warning lights came on and it became very difficult to stop the car. Then if I had to break suddenly and hard it would stall. I brought it to the repair shop and the brake booster was defective. The brake booster along with the master cylinder had to be replaced. It was a very dangerous and frightening experience the brakes suddenly difficult to use. I contacted Mazda customer service and they did not care. I then tried to escalate the issue over the last two years but it was impossible to contact anyone and all emails came back undeliverable. I just recently learned that I can report this danger to the federal safety agency.

Filed Aug 12, 2022 · CA

Vehicle completely shuts off while driving making it hard to turn the steering wheel and apply brakes. Vehicle is able to be turned back on shortly after. Does this randomly. Probably 2 x within a 3-6 month period

Filed Apr 29, 2021 · Brakes, Engine · 110,000 miles · TX

Tl* the contact owns a 2012 mazda cx-9. The contact stated while driving at various speeds, the vehicle stalled. Additionally, the brakes failed to engage when the brake pedal was depressed. There was no warning light illuminated. The vehicle was taken to an independent mechanic to be diagnosed. The contact was informed that the brake master cylinder and brake booster needed to be replaced. The contact was advised to reach out to the dealership eldorado chevrolet(233 n central expwy, mckinney, tx 75070). The contact wanted a second opinion and the vehicle was taken to eldorado chevrolet (2300 n central expy, mckinney, tx 75070) where it was also diagnosed with the master cylinder and brake booster needing to be replaced. The svc mgr informed consumer he wouldnt advised anyone to drive the vehicle until repairs were made. Due to incorrect title work the dealer refunded some money and took posession of the vehicle. The vehicle was not repaired. The manufacturer was not informed of the failure. The failure mileage was approximately 110,000. The consumer stated the vehicle was put back on the lot for resale. The consumer contacted a lawyer and vehicle was taken off the lot but carfax was not updated with correct information.

Filed Jan 10, 2020 · Engine · 109,000 miles · PA

Tl* the contact owns a 2012 mazda cx-9. The contact stated that while driving at various speeds, the vehicle stalled without warning. The vehicle was towed to kennedy mazda located at 1411 ridge pike, conshohocken, pa 19428, (610)272-0700, to be diagnosed. The contact was informed that the engine was damaged due to a water pump failure. The vehicle was towed back to the home and later repaired by an independent mechanic however, the failure recurred. The manufacturer was notified of the failure. The failure mileage was 109,000. The VIN was not available.

Filed Aug 27, 2019 · Brakes · TN

2012 mazda cx-9. Consumer writes in regards to brake power boost unit failure. *ld the consumer stated that when pressing the break pedal there is a hissing and thunk noise. The engine would stall. The dealership and manufacturer were notified, but denied assistance.

Filed Mar 10, 2019 · Engine · 128,000 miles · NY

Vehicle stalled while exiting the highway, engine light on, noise from timing chain area, vehicle overheats, water pump failure pushes antifreeze into the oil compartment causing the engine to get damaged within minutes whiteout a warning. This is obviously a major very expensive safety issue.

Filed Sep 25, 2018 · Brakes · 90,700 miles · NJ

Vacuum power brake booster failure, my brakes did not work and my car stalled. There is a warranty extension for this problem - not a recall - I never knew anything about it. A consumer must be notified of a recall but not a warranty extension but this is a very dangerous problem. I fear for the safety of others who may not know about the problem. If you don't know about it you do not ask to have it checked and when it fails you are in danger. I appreciate the warranty extension but I honestly think that I should have been notified. No one was injured and there was no property damage - I believe there should be some reconsideration regarding the decision not to issue a recall on this problem.

Filed Jul 16, 2018 · Brakes · 98,039 miles · WI

I parked my mazda after coming back from my lunch break and noticed that my brake pedal was a lot harder to push. I also heard a noise coming from what seemed like the pedal. It sounded like I was letting air out of a balloon. After work, while driving in reverse to back out of my parking stall, I noticed the brakes were still very hard to push. The noise was also still happening, but it was louder. I decided not to drive my vehicle until I had it looked at by a mechanic. When my mechanic started my vehicle and began to test drive it, the noise was gone, but he also felt that it was very hard to apply my brakes. The problem was diagnosed as a bad brake booster. After the problem was diagnosed, I researched common complaints with this, and discovered that it is also an issue in the earlier models (2010 and 2011) this is a major safety risk that I would like investigated. Thank you!

Filed Nov 26, 2017 · Engine · 77,900 miles · FL

The mazda cx 9 cuts off without warning at traffic lights. It also has cut off at low speed turns. It restart some times. Sometime it will not for a few minutes. Been left in the middle lane of us 27 south of sebring florida at a traffic light stalled. The RPM fluxuates at times and the vehicle surges. Dangerous situation when in the center lane and it just cuts off with no warning. No engine check light or warning prior to cutting off.

Filed May 23, 2017 · Engine · 500 miles · KS

Purchased the vehicle new from davis moore mazda- wichita, ks. For the past 4 years we have experienced multiple engine stalls as well as complete engine stopping while driving, city, highway, turning etc. Have had the car into their service dept. Many times and they keep saying it is fine ( the last time they said it might be caused by having 8 oz too much engine oil in it). We have less than 12,000 miles on it to date because we are afraid to drive it. I believe this is a very real safety issue. We have all the paperwork for each service dept. Visit. Last two visits we were treated like we were making this stuff up. This has been happening every year since purchasing.

Filed Mar 2, 2017 · Electrical · 68,000 miles · MN

Tl* the contact owns a 2012 mazda cx-9. The contact stated that while driving at low speeds, the vehicle stalled without warning. The failure occurred on six occasions. The vehicle was taken to a dealer but was not diagnosed or repaired. The manufacturer was not notified of failure. The failure mileage was approximately 68,000.