This SA supersedes the previously issued SA(s) listed below. The changes are noted in Red. SA-061/25 12/17/25 DESCRIPTION If you encounter any type of electrical concern (e.g, dead battery, engine no start, DTC(s) stored...), interview the customer before proceeding with normal MGSS diagnosis by asking if any aftermarket devices have been installed. Aftermarket devices may be the cause of the electrical concern. Below are a few examples of unusual electrical concerns caused by aftermarket devices. Examples: 1. Devices connected to the DLC-2 (battery discharge/DTC stored) 2. Devices plugged into the 12V outlet 3. GPS tracking device (engine no start/battery discharge) 4. Dash cam (DTC stored)
full bulletin at NHTSA ↗2020 Mazda CX-5 engine problems
moderate Owners of the 2020 Mazda CX-5 have filed 12 NHTSA complaints about the engine at roughly $3,100 to repair (U.S. federal records, as of August 2026). Source: NHTSA Office of Defects Investigation. See engine across all vehicles →
Complaints
12
Recalls
0
Avg fix
$3,100
| Model year | engine complaints |
|---|---|
| 2016 CX-5 | 21 |
| 2017 CX-5 | 9 |
| 2018 CX-5 | 86 |
| 2019 CX-5 | 101 |
| 2020 CX-5 (this page) | 12 |
| 2021 CX-5 | 63 |
| 2022 CX-5 | 6 |
| 2023 CX-5 | 8 |
| 2024 CX-5 | 3 |
Is there a fix? Manufacturer service bulletins
The manufacturer has issued service bulletins covering engine 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 ↗This Service Alert supersedes the previously issued M-Tip(s) listed below. The changes are noted in Red text. MT-002/19 09/30/19 and 12/19/19 DESCRIPTION If an engine assembly is replaced after a catastrophic internal mechanical failure, clean the intake manifold internally before installing a replacement engine assembly. If the intake manifold is not cleaned properly, the replacement engine may fail prematurely. Metallic debris from the old engine (with catastrophic internal mechanical failure) may rest inside the intake manifold. When the new engine assembly is installed, debris in the intake manifold will be ingested into the new engine and cause internal damage. Clean the intake manifold
full bulletin at NHTSA ↗This Service Alert supersedes the previously issued SA(s) and TSB(s) listed below: The changes are noted in Red. SA-035/24 05/31/24 DESCRIPTION There is a concern that some water pumps are being replaced that are not faulty, due to signs of a very small coolant leak from the bleed hole. This Service Alert is to inform you about the water pump sealing mechanism and the criteria if replacement is necessary or not. A mechanical seal (A) is used for the water pump. This mechanical seal can seal coolant (B) by sliding a mating ring (C) against a seal ring (D). When the sliding surface temperature of the mechanical seal is more than 248 °F (120 °C) while driving, a small amount of steam (E) is lea
full bulletin at NHTSA ↗Subject: TSB 01-001/26 Warranty and Parts Kit Update INCLUDES: Warranty Extension Program - Special Service Program (SSP) D8 Check Engine Light ON with DTC P0126:00, 2018-2025 CX-5, 2019-2023 Mazda3, 2019-2022 CX-3, 2018-2021 Mazda6, 2020-2023 CX-30 Dear Mazda Dealer Colleagues, Mazda Motor Corporation has made a change regarding related parts to TSB 01-001/26 which also impacts Warranty Extension Special Service Program (SSPD8). Parts Ordering and Warranty Claims: Effective March 5, 2026 only the related parts kit PYY2-15-SAY can be ordered and claimed for any repair. The two separate parts PYFB-15-169 and PE13-15-296 can no longer be claimed with repaired dates of March 5, 2026 and later.
full bulletin at NHTSA ↗Source: NHTSA manufacturer communications. Bring the bulletin number to your dealer or shop.
The failure pattern owners describe
The 2020 CX-5 shows a cluster of engine concerns spanning oil sealing, combustion management, and driveability. Oil leaks dominate the narratives: timing cover gaskets, oil pan gaskets, and at least one reported cylinder head crack all leak from or shortly after purchase or early ownership. One owner's oil pan gasket, repaired at 57K miles under warranty, leaked again by 65K. Another discovered a cylinder head crack spilling oil, which burned off in the cabin. Two owners triggered low oil warnings at 24,993 and 52,764 miles despite following manufacturer service intervals—well before their next scheduled change.
Driveability faults appear next: one vehicle stalled without warning at 65 mph on a six-lane highway at 32K miles and wouldn't reproduce at the dealer. Another surged at idle (600–1,000 rpm) at 9,000 miles, creeping forward at a stop light. A third made an unexplained whoop sound at idle under 25K miles; the dealership had no answer. One owner reported the engine refusing to shut off on the first ignition command. An owner noted hesitation on acceleration and unintended acceleration, suspecting a fuel pump defect similar to other CX-5 recalls. A coolant thermostat logged code P0126 for cooler-than-normal operation. Throughout, dealer responses ranged from unable-to-diagnose to warranty denial once mileage exceeded coverage limits.
Same Mazda CX-5 engine reports on nearby years: 2018 · 2019 · 2021
Failure modes owners describe
Oil pan gasket leak
Oil pan gasket fails to seal properly from manufacture, resulting in weeping and progressive leaking of engine oil. Manifests as visible oil accumulation and eventual triggering of low oil warning light.
When: First identified during routine oil changes; progressive failure from manufacture through 57K miles and beyond
Symptoms owners cite: Oil weeping and pooling beneath vehicle; Oil on spark plugs; Low oil warning light illumination; Visible oil leaks onto access cover
Repairs/costs cited: Dealership replaced oil pan gasket at 57K miles; leak recurred shortly after repair
Recalls/TSBs owners mention: Initially covered under warranty at dealership; subsequent recurrence met with resistance before repair approval
Timing cover gasket leak
Timing cover gasket does not seal properly from manufacture, allowing oil to escape.
When: Early in vehicle ownership
Symptoms owners cite: Oil weeping from timing cover area
Recalls/TSBs owners mention: Covered under warranty without pushback
Cylinder head crack
Crack develops in cylinder head above exhaust manifold, allowing oil to escape and burn off during driving. Owner reports this is a known issue for Mazda vehicles online.
Symptoms owners cite: Oil leak with visible oil spilling; Smoke entering cabin from burning oil; Oil consumption
Repairs/costs cited: Owner had leak diagnosed as cracked cylinder head
Excessive oil consumption
Vehicle consumes oil at a rate exceeding normal parameters, triggering low oil warning light before scheduled maintenance intervals despite regular maintenance.
When: At 24,993 miles; at 52,764 miles (300 miles before 7500-mile service interval)
Symptoms owners cite: Low oil warning light illumination well before scheduled service; Premature oil change due notification
Repairs/costs cited: Owner switched to 5000-mile oil change intervals; dealership has not verified any issues
Engine stall while driving
Engine stalls suddenly during highway driving with cruise control engaged. Vehicle can be restarted and continues to operate normally.
When: At 32,000 miles
Symptoms owners cite: Sudden engine stall while traveling at 65 MPH; Vehicle coasted to complete stop
Repairs/costs cited: Dealership unable to determine cause and unable to confirm failure occurred; vehicle not repaired
Idle surging
RPM fluctuates between 600-1,000 at stop, causing vehicle to move forward while brake pedal is depressed.
When: At approximately 9,000 miles
Symptoms owners cite: RPM fluctuation from 600-1,000 while stopped at light; Vehicle creeping forward despite brake applied; No warning lights
Repairs/costs cited: Failure duplicated at dealership but vehicle not repaired
Unexplained whoop sound at idle
Vehicle emits an unusual whoop noise after short driving periods when idling at stops or in parking lots. No warning lights present. Dealership unable to identify cause.
When: At less than 25K miles
Symptoms owners cite: Intermittent whoop sound during idle; Sound occurs unpredictably after driving
Repairs/costs cited: Dealership unable to determine cause
Engine does not shut off
Engine continues running after pressing the ignition off button. Requires multiple attempts to fully shut down.
Symptoms owners cite: Engine continues running after first ignition off command; Resolves after restart and subsequent shutdown attempt
Coolant thermostat failure
Engine coolant thermostat failure results in cooler than normal engine operating temperature range.
Symptoms owners cite: Engine running cooler than normal
Codes mentioned: P0126
Acceleration hesitation and reduced power
Engine hesitates during acceleration, particularly at high speeds, with reduced power response and occasional unintended acceleration. Owner notes this appears consistent with a known fuel pump recall affecting other CX-5 models.
Symptoms owners cite: Hesitation with acceleration; Reduced power at high speed; Delayed response when accelerating; Occasional unintended acceleration; Strong gasoline smell after driving and parking
Recalls/TSBs owners mention: Similar defect is subject to recall in other CX-5 models (fuel pump failure)
Synthesized from 12 NHTSA owner complaints — unverified consumer allegations, summarized for patterns. The verbatim filings appear below.
What owners are reporting 1 most recent
Low oil light came on at 52,764 miles, 300 miles before the next oil change on the manufacturer-recommended 7500 mile schedule. I've switched to a 5000 mile oil change schedule and will be monitoring oil level going forward for excessive oil consumption. I have always done oil changes every 7500 miles and have followed all other maintenance prescribed in the manual.
Had engine trouble with your 2020 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 engine problem on the 2020 Mazda CX-5?
It's a documented issue but not catastrophic. 12 complaints have been filed. Repairs average $3,100 and most owners catch it before it causes a breakdown.
At what mileage does the engine typically fail?
Based on the 12 complaints filed, engine issues most often appear around 20,500 miles. Some report problems earlier; some make it well past 150,000 with no symptoms. Maintenance habits matter — vehicles that received timely fluid services and were not regularly overworked tend to last longer.
What does it cost to fix?
Independent shops typically charge around $3,100 for engine 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 engine?
No active recalls currently cover engine 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/2020/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.