This bulletin supersedes the previously issued bulletin(s) listed below. The changes are noted in Red. 01-008/23 06/05/23 Some vehicles may exhibit rattling noises from the engine compartment and oil leakage from the drive belt auto tensioner. This may be caused by insufficient sealing at the drive belt auto tensioner damper when the auto tensioner fully operates under both high ambient temperature and high load conditions. To eliminate this concern, the shape of the drive belt auto tensioner damper has been changed. REPAIR PROCEDURE If the tensioner is found to be "No Good" after completing the Drive Belt Auto Tensioner Inspection, replace it with a modified part according to the instructio
full bulletin at NHTSA ↗2016 Mazda CX-5 powertrain problems
severe Owners of the 2016 Mazda CX-5 have filed 49 NHTSA complaints about the powertrain, typically surfacing around 6,632 miles at roughly $2,500 to repair (U.S. federal records, as of July 2026). Source: NHTSA Office of Defects Investigation. See powertrain across all vehicles →
Failure mileage
Complaints
49
Recalls
0
Avg fix
$2,500
| Model year | powertrain complaints |
|---|---|
| 2013 CX-5 | 35 |
| 2014 CX-5 | 49 |
| 2015 CX-5 | 19 |
| 2016 CX-5 (this page) | 49 |
| 2017 CX-5 | 11 |
| 2018 CX-5 | 17 |
| 2019 CX-5 | 29 |
| 2020 CX-5 | 8 |
5crashes
2injuries
When does it fail?
Of the 49 powertrain complaints filed for the 2016 Mazda CX-5, here's the actual mileage breakdown — failures cluster heaviest at 0-25,000 mi.
0-25k
25-50k
50-75k
75-100k
100-125k
125-150k
150k+
Each bar shows the share of total complaints filed at that mileage range. Peak failure window highlighted. Some owners report problems earlier; some make it well past 150,000 miles symptom-free. Maintenance habits and driving conditions shift the curve as much as mileage alone.
What stands out
Of the 12 model years of Mazda CX-5 we track for powertrain problems, this one carries the most owner complaints on file — 49.
Owners have filed 49 powertrain complaints with NHTSA against this vehicle, but no formal recall covers the issue — the federal record reflects what manufacturers have admitted, not everything owners are reporting.
Is there a fix? Manufacturer service bulletins
The manufacturer has issued service bulletins covering powertrain on this vehicle — documented repair instructions, service campaigns, or warranty extensions sent to dealers. A TSB isn't a recall (it's not a free safety remedy), but it's the manufacturer acknowledging the issue and how to fix it.
This Service Alert supersedes the previously issued SA listed below: The changes are noted in Red. SA-011/24 02/12/24, 06/06/24, 07/29/24 DESCRIPTION Mazda has developed factory recommended scheduled maintenance services that support all major vehicle systems. Mazda recommends dealers follow the scheduled maintenance tables as cited in the vehicle-specific workshop manual or owner's manual. Services performed outside of Mazda's factory scheduled maintenance are not recommended. These services are unnecessary and create unneeded expenses for your customers. SCHEDULED MAINTENANCE Refer to the applicable Workshop Manual or Owner's Manual for vehicle -specific manufacturer scheduled maintenance.
full bulletin at NHTSA ↗Noise, Vibration, and Harshness (NVH) Diagnostic Guidelines Diagnostic Guidelines When diagnosing NVH concerns, it is essential to first classify the issue into one of three primary categories: Noise, Vibration, or Harshness. Many customer complaints may involve overlapping symptoms, such as both noise and vibration, so identifying the dominant characteristic is critical. Once the primary symptom is determined, follow the appropriate diagnostic path. For example, if a concern includes both noise and vibration but is related to vehicle speed, the vibration diagnostic path should be followed. When considering component replacement during the diagnostic process, it is best practice to start wit
full bulletin at NHTSA ↗Some customer's might state that they notice fluid or oil leaking/dripping on the ground when the vehicle is parked. For this concern, inspect the vehicle for any trace of a fluid or oil leak and use the following examples as a guide to determine if it is severe enough to require a repair, or just to clean the area and monitor it at the next service. Examples of residue or seepage that may not be considered a leak and that may not require repair based on splash shield inspection.
full bulletin at NHTSA ↗The SKYACTIV-DRIVE FW6A-EL AT uses “Automatic Transmission Fluid (ATF) Type: FZ”. Only use “ATF-FZ” to fill or top off the fluid level. ATF-FZ is specially designed for use in the SKYACTIV-DRIVE series AT. It is a low viscosity formula with less friction for better fuel economy. NOTE: ATF-FZ is colored blue for easy identification.
full bulletin at NHTSA ↗Source: NHTSA manufacturer communications. Bring the bulletin number to your dealer or shop.
The failure pattern owners describe
Owners consistently describe transmission failures—delayed engagement, harsh lurching, and complete loss of drive—often within the first few thousand miles. At stops or during shifts from Park to Drive or Reverse to Drive, the transmission hesitates 2–5 seconds while the engine revs loudly, then jerks harshly into gear. Some report the car acts as if in neutral despite being in Drive, creating dangerous situations at traffic lights and when merging. On the highway, sudden loss of power, inability to accelerate past certain speeds, and violent downshifts from high RPMs occur without warning. A few owners report unintended acceleration and loss of braking, with brake pedals becoming unresponsive. Transmission fluid leaks, noisy bearings, and differential seal failures allowing water contamination are documented. One owner reports the vehicle rolling backward while supposedly in Park, and another describes the transmission shifting unexpectedly from Park to Reverse while parked. Dealers frequently cannot replicate issues during inspection yet approve full transmission replacement under warranty, suggesting Mazda recognizes a systemic problem. Cold-start lurching, reluctance to downshift on inclines, and jerking during deceleration appear in multiple reports. Early differential failure at low mileage with rust, metal shavings, and water intrusion is cited as a manufacturing defect linked to faulty seals.
Same Mazda CX-5 powertrain reports on nearby years: 2013 · 2014 · 2015 · 2017 · 2018
Failure modes owners describe
Transmission engagement delay and harsh lurching
Transmission hesitates 2–5 seconds when shifting from Park to Drive or Reverse to Drive. Engine revs loudly while vehicle remains stationary or in neutral, then jerks harshly forward when finally engaging. Occurs from cold start and during normal driving.
When: Typically within first 5,000 miles; some reports as early as 500–1,600 miles
Symptoms owners cite: 2–5 second delay before transmission engages; Engine revs loudly while car remains stationary; Violent jerk/lurch when transmission finally engages; Happens when shifting from Park to Drive or Reverse to Drive; Occurs at traffic lights and stop signs; Cold-start lurching when transmission is cold
Repairs/costs cited: Full transmission replacement; dealers approved under Mazda warranty on multiple vehicles with low mileage (500–5,000 miles). Parts cost and labor not specified by owners; some cite 2–3 week lead times for transmission availability.
Recalls/TSBs owners mention: Mazda authorizes full transmission replacement under powertrain warranty. One owner cites TSBs 10155436 and 10145248 regarding differential defect, indicating known issues. Dealer documentation of the problem is inconsistent; one owner reports dealer told them off-the-record they could duplicate the issue but would not document it.
Loss of drive power (car acts in neutral despite being in Drive)
Vehicle refuses to move forward when in Drive, acting as if transmission is in neutral. Engine spins but no forward motion. Can occur at stops or during highway driving. Reverse gear typically still functions.
When: Within first few thousand miles; one case at 17,000 miles
Symptoms owners cite: No forward motion despite being in Drive; Engine spins/revs but vehicle does not accelerate; Reverse gear continues to work normally; City brake system malfunction light may appear; Multiple attempts to shift Park-Drive-Park-Drive may finally engage drive; Complete loss of propulsion in dangerous situations (merging, crossing intersections)
Codes mentioned: City brake system malfunction light
Repairs/costs cited: Full transmission replacement. One dealer noted they had already replaced multiple transmissions for similar failures on this model. No explanation of root cause provided to owners.
Recalls/TSBs owners mention: Mazda authorizes full transmission replacement. Transmissions are sent back to Mazda; dealers do not provide diagnosis of failure cause.
Unintended acceleration and brake failure
Engine suddenly revs to high RPMs and vehicle accelerates uncontrollably without driver input. Brake pedal becomes unresponsive or does not stop the vehicle. All warning lights illuminate on dashboard.
When: Early in ownership (5,000–7,000 miles); instances occur during normal parking and low-speed maneuvers
Symptoms owners cite: Sudden, uncontrolled acceleration; Engine revs to high RPM without driver action; Brake pedal unresponsive or ineffective; All dashboard warning lights illuminate; No beeping or warning before event; Vehicle rolls or accelerates into obstacles (buildings, parked cars, medians)
Repairs/costs cited: Vehicles towed to dealer; damage to vehicle and property ($2,300–$5,100+ reported). 'Black box' (event data recorder) installed and vehicle monitored for 3–7 days. No repairs made; dealer declares vehicle 'working as designed.'
Recalls/TSBs owners mention: Mazda USA engineers reviewed data but found no defect. Dealer states vehicle is 'working as designed.' One dealer bought back the vehicle and replaced it with another 2016 CX-5. No recall issued; owners left unable to prove mechanical defect for insurance claims.
Unintended shifting and disengagement while parked
Vehicle shifts unexpectedly from Park to Reverse or rolls backward while parked with transmission in Park. Radio and dash lights may stay on after engine shut off, suggesting electrical anomaly.
When: Mid-ownership (1–2 years); one incident at Ft. Lauderdale airport, another in driveway
Symptoms owners cite: Vehicle rolls backward while supposedly in Park; Transmission may shift to Reverse on its own; Radio and dash lights remain on after engine off; No warning lights or engine codes; Intermittent; happens unpredictably; Vehicle may strike pedestrians or other vehicles
Repairs/costs cited: Dealer inspection found no problem. One owner reports neighbor's brake sensor replacement resolved similar issue. One dealership reportedly found 'codes appeared' when checking sensors but would not document on repair order.
Recalls/TSBs owners mention: Mazda dealer inspection inconclusive; no defect found or documented. One owner notes this is consistent with online reports of multiple CX-5 owners experiencing the same issue.
Transmission won't shift, stuck in single gear, limited RPM
Transmission refuses to shift out of a single gear (typically 3rd or 4th) or locked in reverse only. Engine RPM capped at 2,000 even when accelerator fully depressed. Multiple warning lights appear.
When: Within first 18,500 miles of ownership
Symptoms owners cite: Transmission stuck in single gear (3rd or 4th); Engine RPM capped at approximately 2,000 RPM; Cannot downshift on inclines; Engine light, traction control light, and flat tire light illuminate; Multiple attempts to shift manually fail; Problem recurs after restart; Car will only move in Reverse
Codes mentioned: Engine light, Traction control light, Flat tire light
Repairs/costs cited: One owner reports computer reset by dealer; lights turned off but car still unresponsive. Vehicle remains at dealership awaiting diagnosis. One owner suggests valve issue in transmission.
Recalls/TSBs owners mention: Mazda dealer attempting diagnosis; no resolution reported at time of complaint.
Harsh downshifts and jerking during acceleration/deceleration
Transmission downshifts abruptly while driving at highway speed, throwing driver forward. RPM jumps nearly 1,000 RPM above expected during acceleration or deceleration. Transmission jerks violently, particularly when coasting to a stop or when inclines require downshift.
When: Throughout ownership at various speeds and driving conditions
Symptoms owners cite: Abrupt downshift from high gear (e.g., 6th to 3rd) at highway speed; Driver thrown forward by harsh downshift; RPM jumps ~1,000 RPM before settling; Jerking and stuttering during coasting to stop; Tugging sensation when speed declining from 30 MPH to 15 MPH; Upshifting and downshifting without warning; Creaking noise when depressing accelerator from stopped position
Repairs/costs cited: Dealer suggests possible torque converter, transmission, or cold-weather transmission fluid issue. No error codes present. Some owners note AWD variant does not exhibit the same behavior.
Recalls/TSBs owners mention: Mazda customer service and dealership confirm this is 'normal operation for the car to shift into gear when declining in speeds.' Corporate agreed with dealer assessment, though owner disputes this is not normal on other Mazda models or trim variants.
Delayed power response and inability to accelerate
When accelerating from a stop or after coasting, engine revs but vehicle is slow to respond, taking up to 10 seconds to move. Car feels sluggish; pressing gas pedal fully may not produce expected acceleration. Dangerous during highway merging.
When: Throughout ownership, particularly evident during low-speed acceleration and merging
Symptoms owners cite: Engine revs but vehicle hesitates to move (up to 10 seconds); Pressing accelerator to floor produces no immediate response; Vehicle acts as though in neutral despite being in Drive; Dangerous during highway merging; insufficient power to avoid rear-ending; Jerking and jolting when power finally engages; Issue worse when car is cold
Repairs/costs cited: One dealer blamed driver (female with small foot) for simultaneously engaging gas and brake pedals, which owner disputes as physically impossible. No repair offered.
Recalls/TSBs owners mention: Mazda engineers ran diagnostics and concluded driver was engaging gas and brake simultaneously. Dealer refused further action. Owner continues to drive older VW instead of new CX-5.
Cracked cylinder head and engine oil leak
Burning smell from engine compartment; subsequent inspection reveals cracked cylinder head leaking oil internally. No warning lights precede failure.
When: At 39,000 miles; burning smell first noticed on 10/1/22, oil leak evident by 10/3/22
Symptoms owners cite: Burning smell from engine compartment; Oil leaking from under vehicle; Increased oil leakage over 3 days; No check engine light or warning indicators; Smell dissipates then returns
Repairs/costs cited: Cracked cylinder head; covered under Mazda powertrain warranty. Owner concerned about secondary effects on other engine components.
Recalls/TSBs owners mention: Repair covered under Mazda powertrain warranty. Owner notes similar issues on other model years/production runs may not be reported because they are warranty-covered.
Differential seal failure and water contamination
Differential seal is defective, allowing water and moisture to enter the differential housing. Years-long rust buildup, broken couplers, water-contaminated oil, and metal shavings accumulate inside the differential.
When: Discovered at 50,000 miles; defect developed over years of normal driving and weather exposure
Symptoms owners cite: Service light appears on dashboard; Differential housing contains rust and corrosion; Oil contaminated with water and metal shavings; Broken couplers inside differential; Metal particles in transmission fluid
Repairs/costs cited: Dealer quoted differential replacement; warranty claim denied due to defective seal design. Owner cites TSBs 10155436 and 10145248 as evidence of known manufacturing defect. Repair cost and parts not specified by owner.
Recalls/TSBs owners mention: Mazda denies warranty claim, citing owner responsibility for seal failure. TSBs 10155436 and 10145248 referenced by owner as identifying root cause of defect. No recall issued despite owner argument that water intrusion is inevitable with faulty seal design.
Drive belt tensioner failure
Drive belt tensioner leaks and fails at low mileage, requiring replacement. Multiple owners report identical failures around 30,000 miles.
When: At or below 30,000 miles; common failure point reported across multiple owners
Symptoms owners cite: Drive belt tensioner leaks; Tensioner requires replacement
Repairs/costs cited: Drive belt tensioner replacement. Owner notes many owners report identical failure at similar mileage.
Recalls/TSBs owners mention: No recall; issue documented in service bulletins. Owner argues frequent failure at low mileage is a significant safety issue warranting recall rather than service bulletin.
Transaxle bearing damage due to improper case configuration
Damaged bearing in the transaxle caused by improper configuration of the transaxle case. Whining noise audible from transaxle at all speeds; noise increases with speed.
When: About one month before complaint; vehicle likely has higher mileage
Symptoms owners cite: Whining noise from automatic transaxle; Noise occurs during acceleration, deceleration, and steady-speed driving; Noise increases with vehicle speed; Audible inside vehicle cabin
Repairs/costs cited: Service bulletin exists for 2013–2016 Mazda CX-5s addressing this issue. Full transmission replacement required. Owner cannot afford replacement and risks issue recurring with used transmission.
Recalls/TSBs owners mention: Service bulletin issued (not a recall) for 2013–2016 CX-5s. Owner argues defect warrants recall, not just service bulletin.
Loss of power and inability to exceed speed limit
Engine suddenly loses power while cruising on freeway. RPM drops dramatically while speed remains constant, then recovers. On separate occasions, vehicle refuses to accelerate beyond a certain speed (e.g., 60 MPH) despite flat road and full throttle.
When: During freeway driving after ~10 minutes of cruising; second incident ~2 weeks later
Symptoms owners cite: RPM drops from ~2,000 to ~0 RPM while maintaining speed; RPM drops again a few minutes later; Vehicle refuses to exceed a set speed (e.g., 60 MPH) on flat road; No warning lights reported; Would prevent safe acceleration to avoid hazards
Repairs/costs cited: No repairs reported; owner describes incidents without follow-up diagnosis.
Recalls/TSBs owners mention: <UNKNOWN>
Stalling while infotainment system and turn signal active
Infotainment system abruptly turns off; immediately after activating turn signal, vehicle stalls and coasts to stop. Vehicle restarts with check engine light illuminated.
When: During normal driving
Symptoms owners cite: Infotainment system turns off unexpectedly; Vehicle stalls when turn signal activated; Vehicle coasts to complete stop; Check engine light illuminates after restart; No prior warning
Codes mentioned: Check engine light
Repairs/costs cited: No repair reported; incident described without follow-up.
Recalls/TSBs owners mention: <UNKNOWN>
Synthesized from 49 NHTSA owner complaints — unverified consumer allegations, summarized for patterns. The verbatim filings appear below.
What owners are reporting 2 most recent
While attempting to pull into a parking space with a 2016 Mazda cx-5 (7000 miles) all of the warning lights on the dashboard lit up and the car started accelerating on its own (unintended acceleration). The brakes would not work! In an attempt to avoid the car parked in front of me I swerved to the right, unfortunately I hit the parked car with enough force to moved it about 12 feet forward. My…
The transmission needed to be replaced after 1,525 miles. Today, after 1,600 miles the driver's window automatic up/down function stopped working.
Had powertrain trouble with your 2016 Mazda CX-5?
File a complaint with NHTSA → It's free, official, and how every report above got here — owner filings are the federal safety record this page is built on.
Common questions
How serious is the powertrain problem on the 2016 Mazda CX-5?
It's a meaningful issue. 49 complaints have been filed and the failure mode causes operational problems for owners. Repairs average $2,500.
At what mileage does the powertrain typically fail?
Across the 35 complaints that reported odometer mileage, most powertrain failures cluster between 3,200 and 24,800 miles, with the median around 6,632. A quarter of owners report trouble before 3,200; a quarter make it past 24,800. Maintenance history matters more than the odometer alone — this is the reported failure window, not a guarantee.
What does it cost to fix?
Independent shops typically charge around $2,500 for powertrain repairs on this vehicle. Dealer pricing tends to run 20-40% higher. The exact figure depends on the specific failure mode, parts availability, and your local labor rates. If you're outside factory warranty, an extended service contract often covers this category.
Are there any recalls related to powertrain?
No active recalls currently cover powertrain issues on this vehicle. The complaints filed represent owner-reported failures that haven't risen to the level of a manufacturer-issued recall — but they're still worth knowing about before you buy or budget for repairs.
Related
Complaint and recall data sourced from the National Highway Traffic Safety Administration (NHTSA)
public records database. Verify the raw federal record at
nhtsa.gov/vehicle/2016/Mazda/CX-5.
Severity ratings are derived from reported crashes, fires, injuries, and fatalities. Repair cost estimates are
independent-shop national averages and may differ in your area. Some links on this page are affiliate links.