2023 Mazda CX-5 Problems

What owners report

Complaints on this model year cluster around a few recurring themes: a noisy headlight assembly that several owners say dealers identified as a known issue, unintended or unexpected acceleration while maneuvering into parking spaces and while braking, and warnings from the driver-assistance and blind-spot systems that come and go. Reports arrive at low mileage as well as past 40,000 miles, and several owners say the dealer could not reproduce the symptom or declined repair coverage once the vehicle was out of warranty.

1. 1
   Exterior lighting

   Noisy headlight assembly (cooling fan / leveling motor)

   • 9 complaints (13%)
   • typically at 3.4 yrs old
   • filed 2025–2026

   Owners describe a loud humming, whirring or grinding from one headlamp assembly that starts when the lights come on and continues after the vehicle is shut off until the light goes out. Several say the dealer diagnosed a failed internal LED cooling fan or adaptive headlight motor and that the whole assembly must be replaced rather than the small part. Some reports note the repair was covered early on, while others were told coverage did not apply once mileage passed the warranty limit. A few mention the noise being accompanied by vibration felt inside the cabin. Reported from roughly 25,000 miles upward, with several owners noting it began around 40,000 to 48,000 miles, often shortly after the basic warranty expired.

   1 related service bulletin

   What to check: With the engine off, switch the headlights on and listen at each front lamp for humming or grinding that keeps running; ask whether any headlamp assembly has already been replaced under warranty.

   2 excerpts from owner complaints in NHTSA records

   “I began hearing a loud engine noise similar to a lawn mower whenever my headlights would come on which includes just when I unlock my car. When I first took it back to the Mazda dealership for servicing and mentioned this to the service manager he told me it was an issue with the headlights that they’ve been seeing. They returned the car to me and said they did not hear it. …”

   NHTSA complaint #11768904, filed 2026-10

   “At 44,000 miles, a loud whirring noise started to occur that is due to the failing of the internal LED cooling fan in my left headlamp. I cannot use my headlights, which is a safety concern.”

   NHTSA complaint #11767366, filed 2026-09
2. 2
   Brakes

   Unexpected acceleration while braking or parking

   • 10 complaints (15%)
   • typically at 1.3 yrs old
   • 5 mention a crash, fire or injury
   • filed 2023–2026

   Complaints describe the vehicle surging forward or backward unexpectedly at very low speed, typically while creeping into a parking space or when the brake pedal is pressed. Some owners report that stopping required heavy pedal effort despite braking, and in several cases the vehicle traveled over a curb or into an object. Dealers are reported to have scanned for codes and returned the vehicle, or to have said the behavior was within normal design parameters. Reported from as little as 150 miles up to about 10,000 miles, mostly during low-speed parking maneuvers.

   What to check: During a test drive, practice very slow parking-lot maneuvers and light brake applications, and ask the seller whether any unintended-movement complaints were reported or diagnosed.

   2 excerpts from owner complaints in NHTSA records

   “When my car starts up, engine rpm is around 1500 or above 1000. If I would switch to reverse, the car sudden jerks back stronger and quicker than I expected even though my foot isn’t on the accelerator pedal and have pressed the brake lightly.”

   NHTSA complaint #11762062, filed 2026-09

   “At 2:00 on a clear afternoon I was slowly coasting into a right hand turn into a parking space, and lightly tapping the brake to finalize the stop, when the car accelerated HARD forward over a curb and a sidewalk into the brick wall of a building. Airbag was deployed. My injuries were a nasty wrist contusion and bloody gashes where the airbag door deployed and I also had complete seatbelt brusing on my throat, chest and across my abdomen. This after traveling a mere 7-8 feet. …”

   NHTSA complaint #11547758, filed 2023-10
3. 3
   Forward collision avoidance

   Driver-assist and blind-spot warnings

   • 8 complaints (12%)
   • typically at 3.0 yrs old
   • 2 mention a crash, fire or injury
   • filed 2024–2026

   Owners report intermittent 'Smart Brake System Malfunction', forward radar, and 'Blind Spot Sensor Malfunction' messages, sometimes several at once along with stability and traction warnings. The messages often clear after a restart and then return after driving a while, and some owners describe the systems failing to intervene or braking unexpectedly when adaptive cruise control is engaged. Complaints mention dealers replacing parts such as a wheel bearing or brake switch without a lasting fix, and one owner was referred to a body shop for a blind-spot sensor replacement. Described across a wide range of mileage, from a few thousand miles to about 48,000, often on freeway drives, at night, or in cooler weather.

   1 related service bulletin

   What to check: On the test drive, watch for warning messages on the cluster and confirm they clear; ask whether any radar, camera or blind-spot sensor has been replaced or recalibrated.

   2 excerpts from owner complaints in NHTSA records

   “After driving a few mile, the following two warnings come up * Smart Brake System Malfunction * Forward Radar Sensor System malfunction. If I turn off the car and then restart, the warnings go away. However, it comes back if I drive for a while again. I have visited dealership a few times for the same issue, they replaced the wheel bearing and brake switch. The warning disappeared for days and came back.”

   NHTSA complaint #11691048, filed 2025-10

   “On 09/01/2026 at approximately 55 mph, I was driving with adaptive cruise control engaged. The vehicle ahead decelerated abruptly. My vehicle began braking hard with no input from me for a fraction of a second. A red BRAKE warning appeared in the instrument cluster with an audible alarm. I then applied the brake pedal hard. On first contact the pedal barely moved from its rest position and was extremely firm. …”

   NHTSA complaint #11761780, filed 2026-09
4. 4
   Visibility (wipers, defrost, mirrors)

   Vibrating or blocked side mirrors and sensors

   Mentioned in 7 of 60 sampled complaints

   Owners describe the driver-side exterior mirror vibrating or shaking at highway speed and in windy conditions, to the point that the view is blurred and lane changes are harder to judge. Some say the dealer called the movement normal or quoted a replacement cost, and others report the mirror's related blind-spot function throwing blocked-sensor messages. A separate set of complaints in this group covers the sunroof or rear glass shattering. Reported from about 1,300 miles up to around 30,000 miles, most often at speeds above 50 to 60 mph or on windy days.

   What to check: Drive at highway speed and watch both mirrors for shake, and inspect the sunroof and rear glass for cracks, chips or replaced panels.

   2 excerpts from owner complaints in NHTSA records

   “The driver-side power door mirror on my 2023 Mazda CX-5 vibrates excessively at highway speeds above 75 mph, especially on windy days. The vibration is so severe that it causes a blurred and distorted view, making it difficult to clearly see vehicles in adjacent lanes. This poses a significant safety risk, as it impairs my ability to make safe lane changes and monitor surrounding traffic. …”

   NHTSA complaint #11684928, filed 2025-09

   “I was driving my new 2023 Mazda CX5 with approximately 1,300 miles in the center lane of a divided highway of the suburbs just north of New York City. I was driving with all windows closed, A/C turned on and the weather was clear, hot and sunny. Without any warning there was a loud and abrupt explosion from within the vehicle. As I looked in my rear view mirror I saw glass blowing in the wind behind me. I suddenly detected wind blowing above my head and realized my sunroof had most likely been the glass I saw behind me. …”

   NHTSA complaint #11529630, filed 2023-06
5. 5
   Engine

   Check engine light with coolant or oil-pressure codes

   • 8 complaints (12%)
   • median 4,000 mi at 1.0 yrs old (1 states mileage, few)
   • filed 2023–2026

   Several owners describe the check engine light coming on, sometimes with a coolant temperature code indicating the engine warms slowly or the blue coolant light stays on, and in some cases coolant loss after a thermostat repair. Others report a P0524 low oil pressure code with no abnormal engine noise, or low oil warnings between changes requiring a quart to be added. Complaints mention dealers clearing codes, checking for leaks, or replacing thermostat-related parts. Reported mostly between roughly 4,000 and 35,000 miles, with the coolant-related complaints often tied to cold ambient temperatures.

   3 related service bulletins

   What to check: Check the coolant level and look for residue around the thermostat housing, check the oil level and note whether top-ups are needed between changes, and ask for any stored or cleared engine codes.

   2 excerpts from owner complaints in NHTSA records

   “Cracked cylinder head probably caused by cylinder deactivation causing catastrophic oil loss on the highway. Upon researching this, I see that it is a known issue with Mazda. My car is now in the shop awaiting repairs. It only has about 35,000 miles on it. This is obviously a known defect and is simply not acceptable.”

   NHTSA complaint #11709112, filed 2026-01

   “Mazda CX-5 Premium Between May and September this year, the MyMazda app has alerted me two times that the oil level was low. I manually checked and it was indeed low. The first time I brought it to a Firestone service center to have it checked and they verified that the level was down considerably to the bottom dot on the stick. They said to bring it to the dealer. I brought it to the dealer and they said they could not find any leaks and to come back in 1000 miles. …”

   NHTSA complaint #11544406, filed 2023-09

Buying note. Ask for the service history on headlamp assemblies and any driver-assist sensor work, and confirm whether the thermostat and oil-pressure bulletins were applied. A longer test drive that includes parking-lot maneuvering, highway speed and a look at stored codes will surface most of what owners report here.

Summary written with AI from a sample of 60 NHTSA complaints for this model year (picked at random, with complaints that state a mileage and recent ones taken first), then checked automatically against the source records. Where a problem shows a complaint count, every complaint for this model year was matched with fixed keyword rules (written with AI and tested against the sample), and the mileage, age and repair figures are calculated from those complaints; owners' figures are as stated, not verified. Other counts refer to the sample. The excerpts come from NHTSA's public complaint records and are unverified; capitalisation is normalised, NHTSA staff notes are removed, and shortened text ends with “…”. Something wrong? Request a correction.