Chevrolet Equinox 2018–2024 problems by year and mileage
3rd generation · GM D2XX
NHTSA data through 18 October 20261,494 complaints, 492 with mileageMethod
Which year is yours? Tap it to see what breaks on it.
The 2018 Chevrolet Equinox
Close- Median failure report
- 22,000 mi
- Complaints filed
- 410
- Recalls naming this year
- 5
† This median likely runs low (why).
Most reported on the 2018
- Brakes118 reports
- Engine86 reports · median 32,000 mi
- Transmission and driveline66 reports
Recall areas Power train — automatic transmission · Service brakes, hydraulic — foundation components · Fuel system, gasoline — delivery
Check the VIN at NHTSA
The 2019 Chevrolet Equinox
Close- Median failure report
- 9,000 mi
- Complaints filed
- 305
- Recalls naming this year
- 4
† This median likely runs low (why).
Most reported on the 2019
- Engine100 reports · median 4,500 mi
- Brakes70 reports
- Electrical system44 reports
Recall areas Power train — automatic transmission · Fuel system, gasoline — storage · Seats
Check the VIN at NHTSA
The 2020 Chevrolet Equinox
Close- Median failure report
- 14,000 mi
- Complaints filed
- 316
- Recalls naming this year
- 4
Most reported on the 2020
- Brakes100 reports
- Engine92 reports
- Fuel and propulsion system50 reports
Recall areas Child seat — vehicle latch anchor · Power train — automatic transmission · Service brakes, hydraulic — foundation components
Check the VIN at NHTSA
The 2021 Chevrolet Equinox
Close- Median failure report
- too few reports to time
- Complaints filed
- 100
- Recalls naming this year
- 4
Most reported on the 2021
- Fuel and propulsion system20 reports
- Electrical system18 reports
- Transmission and driveline17 reports
Recall areas Child seat — vehicle latch anchor · Fuel system, gasoline — delivery · Tires — tread/belt
Check the VIN at NHTSA
The 2022 Chevrolet Equinox
Close- Median failure report
- 17,000 mi
- Complaints filed
- 184
- Recalls naming this year
- 6
Most reported on the 2022
- Fuel and propulsion system79 reports
- Fuel system34 reports · median 18,000 mi
- Engine28 reports
Recall areas Power train — automatic transmission · Child seat — vehicle latch anchor · Fuel system, gasoline — delivery
Check the VIN at NHTSA
The 2023 Chevrolet Equinox
Close- Median failure report
- too few reports to time
- Complaints filed
- 99
- Recalls naming this year
- 3
Most reported on the 2023
- Fuel and propulsion system46 reports
- Engine18 reports
- Problems owners could not categorise17 reports
Recall areas Child seat — vehicle latch anchor · Air bags — sensor · Seats
Check the VIN at NHTSA
The 2024 Chevrolet Equinox
Close- Median failure report
- too few reports to time
- Complaints filed
- 80
- Recalls naming this year
- 1
Most reported on the 2024
- Fuel and propulsion system23 reports
- Electrical system17 reports
- Engine14 reports
Recall areas Structure — body
Check the VIN at NHTSA
Tiles: each year’s median failure mileage. † Median likely runs low (complaints filed after 2020). Latest: the 2018; earliest: the 2019, and the 2018 is 1 year older (part of the gap is age). 3 of these years carry fewer than 30 reports with an odometer reading and show no median at all, rather than one computed from a handful.
The short answer
“Is the 2018–2024 Chevrolet Equinox reliable?”
- Median of reported failures
- 18,000 mi
- 90% of reports came by
- 99,000 mi
- Reports with mileage
- 492
- Recalls
- 17
At least 40% of this generation’s complaints came after 2020, so its median likely runs low (why).
Most reported
- Engine23.7% of complaints · median 15,000 mi
- Brakes21.9% of complaints · median 34,000 mi
- Fuel and propulsion system19.5% of complaints · median 7,500 mi
Owners filed 1,494 complaints with NHTSA about the 2018–2024 Chevrolet Equinox; the engine leads with 23.7% of them, and half of the 492 that record an odometer reading came by 18,000 miles — complaints, not a failure rate.
43% of complaints that record mileage fall within the first 12,000 miles, against 2.6 reports per 1,000 miles between 20,000 and 80,000. On a generation this new that is expected: few examples have been driven further yet, so the timing says little about design or wear so far.
Before-you-buy checklist ↓At your mileage ↓Check this VIN — NHTSA ↗
How many miles does a 2018–2024 Chevrolet Equinox last?
The newest model years (2024) are too young to have reached high mileage; most reports with an odometer reading come from the earlier years of the generation.
On the 2018–2024 Chevrolet Equinox, half of the 492 complaints that record an odometer reading were filed by 18,000 miles and 90% by 99,000 miles (why that is not a lifespan).
12 reports came in past 150,000 miles and 5 past 200,000 — each one proof that an Equinox reached that mileage, not that it failed there.
Figure 1 · Chevrolet Equinox 2018–2024 · 492 reports with mileage
Mileage at failure
10,000-mile bins, 0 to 200,000 miles, linear scale; tallest bar 182 complaints
- First 12,000 miles — 43% of all failures
- Rest of the range
- Median
- 200,000+ — 5 complaints (1.0%), plotted separately
- 10%
- 629
- 25%
- 4,000
- Median
- 18,000
- 75%
- 61,000
- 90%
- 99,000
Show the numbers
| Mileage | Complaints | Share |
|---|---|---|
| 0–10,000 | 182 | 37.0% |
| 10,000–20,000 | 74 | 15.0% |
| 20,000–30,000 | 32 | 6.5% |
| 30,000–40,000 | 30 | 6.1% |
| 40,000–50,000 | 24 | 4.9% |
| 50,000–60,000 | 24 | 4.9% |
| 60,000–70,000 | 22 | 4.5% |
| 70,000–80,000 | 25 | 5.1% |
| 80,000–90,000 | 17 | 3.5% |
| 90,000–100,000 | 14 | 2.8% |
| 100,000–110,000 | 13 | 2.6% |
| 110,000–120,000 | 5 | 1.0% |
| 120,000–130,000 | 8 | 1.6% |
| 130,000–140,000 | 8 | 1.6% |
| 140,000–150,000 | 2 | 0.4% |
| 150,000–160,000 | 4 | 0.8% |
| 160,000–170,000 | 2 | 0.4% |
| 180,000–190,000 | 1 | 0.2% |
| 200,000+ | 5 | 1.0% |
Source: NHTSA Office of Defects Investigation, public domain.
Common Equinox problems, and when they happen
Figure 2 · Chevrolet Equinox 2018–2024
When each system fails
Bar: middle half of reports · notch: median · proportional (log) scale (how to read it)
- Problems owners could not categorise197 reportsmedian 5,000middle half 750–18,000
- Fuel and propulsion system292 reportsmedian 7,500middle half 1,500–27,000
- Engine354 reportsmedian 15,000middle half 2,000–70,000
- Transmission and driveline189 reportsmedian 16,000middle half 3,500–68,000
- Electrical system218 reportsmedian 17,000middle half 3,000–54,000
- Brakes327 reportsmedian 34,000middle half 4,000–75,000
- Fuel system66 reportsmedian 39,000middle half 13,000–72,000
- Your odometer, once entered below
Ordered by median mileage, earliest first.
All systems in a table
| System | Complaints | Share | Median | 25–75% |
|---|---|---|---|---|
| Engine | 354 | 23.7% | 15,000 | 2,000–70,000 |
| Brakes | 327 | 21.9% | 34,000 | 4,000–75,000 |
| Fuel and propulsion system | 292 | 19.5% | 7,500 | 1,500–27,000 |
| Electrical system | 218 | 14.6% | 17,000 | 3,000–54,000 |
| Problems owners could not categorise | 197 | 13.2% | 5,000 | 750–18,000 |
| Transmission and driveline | 189 | 12.7% | 16,000 | 3,500–68,000 |
| Fuel system | 66 | 4.4% | 39,000 | 13,000–72,000 |
| Forward collision avoidance | 61 | 4.1% | — | — |
| Steering | 59 | 3.9% | 10,000 | 3,500–27,000 |
| Throttle and speed control | 51 | 3.4% | 10,000 | 5,000–15,000 |
Known problems with the 2018–2024 Equinox
Engine
1.5L LYX oil consumption and PCV system diaphragm failure, which draws oil into the intake and can damage the turbocharger.
Engine
Intake valve carbon buildup inherent to the port-less direct injection design, causing misfires and rough idle at higher mileage.
Transmission 2018–2020
9T50 9-speed automatic shift quality and calibration complaints.
Before you buy a 2018–2024 Equinox: the 3-minute check
Generated from 492 mileage-tagged complaints, 17 recall campaigns, 3 documented problem areas.
- Run the VIN at nhtsa.gov/recalls. 17 campaigns cover this generation.
- Ask for fuel and propulsion system repair records. Reports on this area come at a median of 7,500 miles — a newer example may not have reached that mileage yet, so ask what was repaired under warranty and what the warranty still covers.
- Ask for problems owners could not categorise repair records. Same question here: a median of 5,000 miles.
- Check engine. What each looks like: Known problems.
- Check transmission on 2018–2020 cars.
- Years differ here: from 80 to 410 complaints a year — compare them by model year.
- End with a pre-purchase inspection of this car.
Equinox problems by mileage: where your car sits
Type your odometer, or read the table.
| System | Middle half of reports, mi | At 60k mi74% below | At 90k mi87% below | At 120k mi94% below | At 150k mi98% below | At 200k mi99% below |
|---|---|---|---|---|---|---|
| Engine | 2,000–70,000 | in window | earlier | earlier | earlier | earlier |
| Brakes | 4,000–75,000 | in window | earlier | earlier | earlier | earlier |
| Fuel and propulsion system | 1,500–27,000 | earlier | earlier | earlier | earlier | earlier |
| Electrical system | 3,000–54,000 | earlier | earlier | earlier | earlier | earlier |
| Problems owners could not categorise | 750–18,000 | earlier | earlier | earlier | earlier | earlier |
| Transmission and driveline | 3,500–68,000 | in window | earlier | earlier | earlier | earlier |
| Fuel system | 13,000–72,000 | in window | earlier | earlier | earlier | earlier |
Figure 3 · Chevrolet Equinox 2018–2024 · 492 reports with mileage
Share of reports below each mileage
Steps at bin edges (how to read it)
- 60,000 mi — 74% of reports below
- 90,000 mi — 87% of reports below
- 120,000 mi — 94% of reports below
- 150,000 mi — 98% of reports below
- 200,000 mi — 99% of reports below
- Median (the 50% line)
- Your odometer, once entered
Linear axis, same as Figure 1.
2018–2024 Chevrolet Equinox recalls (17)
NHTSA records 17 recall campaigns covering vehicles in this generation (what a recall is).
The campaigns cluster around the transmission and driveline (3), the fuel system (3), seats (3) (why one area can repeat).
Nov 2024 · 2022 · Power TrainRear wheel lock-up or moving in an unintended direction can increase the risk of a crash.
The defect. General Motors, LLC (GM) is recalling certain 2022-2023 Chevrolet Express and GMC Savana vehicles. Incorrect software in the transmission control module (TCM) may result in harsh shifting, reduced power, unintended deceleration, rear wheel lockup, or cause…
What can happen. Rear wheel lock-up or moving in an unintended direction can increase the risk of a crash.
The free fix. Dealers will update the transmission control module software calibration, free of charge. Owner notification letters were mailed December 9, 2024. Owners may contact GM customer service at…
Dec 2023 · 2024 · StructureA door opening while the vehicle is being driven can increasing the risk of injury or a crash.
The defect. General Motors, LLC (GM) is recalling certain 2024 Chevrolet Blazer, Blazer EV, Equinox, and GMC Terrain vehicles. The door strikers may fracture, resulting in the door opening unexpectedly.
What can happen. A door opening while the vehicle is being driven can increasing the risk of injury or a crash.
The free fix. Dealers will replace all four door strikers and attaching bolts, free of charge. Owner notification letters were mailed January 24, 2024. Owners may contact Chevrolet customer service at…
May 2023 · 2020–2023 · Child SeatThe inability to install a child seat with the LATCH anchorage bars could result in an unsecured child seat…
The defect. General Motors, LLC (GM) is recalling certain 2020-2023 Chevrolet Equinox and GMC Terrain vehicles. The four rear-seat lower child seat LATCH anchorage bars may have excessive powder coating, which could prevent a child seat from being installed with the…
What can happen. The inability to install a child seat with the LATCH anchorage bars could result in an unsecured child seat, increasing the risk of injury in a crash.
The free fix. Owners are advised to install child seats using the vehicle's rear seat belts until the remedy is complete. Dealers will inspect the latch anchorage bars, and remove and replace the finish, as…
Jan 2023 · 2021–2022 · Fuel System, GasolineAn engine stall increases the risk of a crash.
The defect. General Motors, LLC (GM) is recalling certain 2021-2022 Chevrolet Equinox and 2022 GMC Terrain vehicles. The fuel pump module may not consistently provide sufficient fuel to the engine, resulting in an engine stall.
What can happen. An engine stall increases the risk of a crash.
The free fix. Dealers will replace the fuel pump module, free of charge. Owner notification letters were mailed June 5, 2023. Owners may contact Chevrolet customer service at 1-800-222-1020 or GMC customer service…
Dec 2022 · 2023 · Air BagsIn the event of a crash, a front passenger air bag that deploys with a child or infant in the front passenger…
The defect. General Motors, LLC (GM) is recalling certain 2023 Chevrolet Equinox and GMC Terrain vehicles equipped with ventilated front passenger seats. The Occupant Classification System may not properly disable the front passenger air bag when there is a small child…
What can happen. In the event of a crash, a front passenger air bag that deploys with a child or infant in the front passenger seat can increase their risk of injury.
The free fix. Dealers will replace the passenger presence system, free of charge. Owner notification letters were mailed January 24, 2023. Owners may contact Chevrolet customer service at 1-800-222-1020 or GMC…
Sep 2022 · 2022–2023 · SeatsA seat with a missing or loose bolt may not properly restrain the occupant in a crash, increasing the risk of…
The defect. General Motors, LLC (GM) is recalling certain 2022-2023 Chevrolet Equinox and 2022 GMC Terrain vehicles. The driver's seat may have a stripped or loose bolt at the seat frame height-adjust pivot.
What can happen. A seat with a missing or loose bolt may not properly restrain the occupant in a crash, increasing the risk of injury.
The free fix. Dealers will inspect the driver's seat and replace the seat cushion frame, if necessary, free of charge. Owner notification letters were mailed on November 4, 2022. Owners may contact Chevrolet…
May 2022 · 2022 · SeatsAn improperly welded seat frame may not adequately restrain the driver in a crash, increasing their risk of…
The defect. General Motors, LLC (GM) is recalling certain 2021 Chevrolet Malibu, 2022 Chevrolet Equinox, Blazer and Cadillac XT4 vehicles. The driver's seat cushion frame may have an improper weld in the power tilt-adjustment mechanism.
What can happen. An improperly welded seat frame may not adequately restrain the driver in a crash, increasing their risk of injury.
The free fix. Dealers will inspect the driver's seat and replace the cushion frame, as necessary, free of charge. Owner notification letters were mailed June 23, 2022. Owners may contact Chevrolet customer service…
Aug 2021 · 2021–2022 · TiresTread separation can result in a loss of vehicle control, increasing the risk of a crash.
The defect. General Motors, LLC (GM) is recalling certain 2021-2022 Chevrolet Equinox and GMC Terrain vehicles equipped with certain Hankook tires. The tires may have been manufactured with an insufficient amount of curative agent, which could cause tread separation.
What can happen. Tread separation can result in a loss of vehicle control, increasing the risk of a crash.
The free fix. Dealers will inspect the tire DOT numbers, and replace any affected tires, free of charge. Owner notification letters were mailed on August 31, 2021. Owners may contact GMC customer service at…
Dec 2020 · 2021 · Seat BeltsIf a seat belt assembly is not properly attached to the vehicle, the seat belt may not properly restrain an…
The defect. General Motors, LLC (GM) is recalling certain 2020 Chevrolet Bolt EV and 2021 GMC Canyon and Sierra 1500, 2500 and 3500, Yukon, Yukon XL, Cadillac Escalade and Escalade ESV and Chevrolet Blazer, Camaro, Colorado, Equinox, Silverado 1500, 2500 and 3500…
What can happen. If a seat belt assembly is not properly attached to the vehicle, the seat belt may not properly restrain an occupant in the event of a crash, increasing the risk of injury.
The free fix. GM will notify owners, and dealers will replace the suspect bolts, free of charge. The recall began January 29, 2021. Owners may contact GMC customer service at 1-800-462-8785, Cadillac customer…
Oct 2020 · 2018–2020 · Power TrainMissing bolts on the start-stop accumulator endcap could result in a transmission oil leak and may progress…
The defect. General Motors LLC (GM) is recalling certain 2018-2019 Chevrolet Cruze and Buick LaCrosse, 2018-2020 Chevrolet Equinox, Chevrolet Traverse and GMC Terrain, 2018 Chevrolet Malibu, 2019-2020 Buick Encore, Buick Enclave, Cadillac XT4, Chevrolet Blazer and GMC…
What can happen. Missing bolts on the start-stop accumulator endcap could result in a transmission oil leak and may progress to a loss of propulsion, increasing the risk of a crash. A transmission fluid leak in the…
The free fix. GM will notify owners, and dealers will inspect the start-stop transmission accumulator and replace it if any bolts are missing, free of charge. The recall began December 15, 2020. Owners may contact…
Oct 2019 · 2020 · Service Brakes, HydraulicBrake drag may result in overheating of the brake pads, affecting the braking ability and increasing the risk…
The defect. General Motors LLC (GM) is recalling certain 2020 Chevrolet Equinox vehicles. The rear brake calipers may have been produced with an incorrect lubricant, potentially causing the rubber seals to swell and the brakes to drag.
What can happen. Brake drag may result in overheating of the brake pads, affecting the braking ability and increasing the risk of a crash.
The free fix. GM will notify owners, and dealers will replace the rear brake calipers, including the brake hose gasket, brake fluid and wheel to hub lubricant, free of charge. The recall began October 29, 2019.…
Sep 2019 · 2019–2020 · Fuel System, GasolineA fuel leak in the presence of the ignition source can increase the risk of a fire.
The defect. General Motors LLC (GM) is recalling certain 2019-2020 Chevrolet Equinox all-wheel drive vehicles. The fuel tanks may have been manufactured with an improperly sealed seam, possibly allowing fuel to leak along the seam near the fuel inlet.
What can happen. A fuel leak in the presence of the ignition source can increase the risk of a fire.
The free fix. GM will notify owners, and dealers will replace the fuel tank, free of charge. The recall began October 24, 2019. Owners may contact GM customer service at 1-586-596-1733. GM's number for this recall…
Mar 2019 · 2019 · SeatsIn the event of a crash, the insufficient welds may result in an increased risk of injury for an occupant…
The defect. General Motors LLC (GM) is recalling certain Chevrolet Equinox and GMC Terrain vehicles. The rear-right seat may have insufficient welds on the head-restraint bracket.
What can happen. In the event of a crash, the insufficient welds may result in an increased risk of injury for an occupant seated in the rear-right position.
The free fix. GM will notify owners, and dealers will replace the rear-right seatback frame, free of charge. The recall began April 15, 2019. Owners may contact Chevrolet customer service at 1-800-222-1020 or GMC…
Aug 2018 · 2018–2019 · Service Brakes, HydraulicA reduction of braking performance can increase the risk of a crash.
The defect. General Motors LLC (GM) is recalling certain 2018-2019 Chevrolet Equinox, Impala, Cruze, Volt and Bolt EV vehicles, GMC Terrain vehicles, Buick Lacrosse and Regal vehicles, Cadillac XTS and XTS Professional vehicles and 2018 Chevrolet Malibu vehicles. The…
What can happen. A reduction of braking performance can increase the risk of a crash.
The free fix. GM will notify owners, and dealers will bleed the vehicle's brake system, free of charge. The recall began October 11, 2018. Owners may contact Buick customer service at 1-800-521-7300, Cadillac…
May 2018 · 2018 · Fuel System, GasolineA damaged fuel line can create a fuel leak, increasing the risk of a fire.
The defect. General Motors LLC (GM) is recalling certain 2015-2018 GMC Canyon, 2016-2017 Buick Envision, 2016-2018 Chevrolet Colorado and Malibu, 2017-2018 GMC Acadia, 2018 Buick LaCrosse, Cadillac ATS, Chevrolet Equinox, and GMC Terrain vehicles. The high pressure fuel…
What can happen. A damaged fuel line can create a fuel leak, increasing the risk of a fire.
The free fix. GM will notify owners, and dealers will replace the high pressure fuel pump, and high pressure fuel pipe, free of charge. The recall began July 2, 2018. Owners may contact Buick customer service at…
Apr 2018 · 2018 · VisibilityIf the glass is not tempered properly, and the window is broken, the glass can break into large pieces…
The defect. General Motors LLC (GM) is recalling certain 2018 Chevrolet Equinox vehicles. The driver and front passenger door window glass may not be properly tempered. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard…
What can happen. If the glass is not tempered properly, and the window is broken, the glass can break into large pieces, increasing the risk of injury.
The free fix. GM will notify owners, and dealers will replace the glass in the front doors, free of charge. The recall began May 15, 2018. Owners may contact Chevrolet customer service at 1-800-222-1020. GM's…
Aug 2017 · 2018 · Power TrainIf the front right intermediate drive shaft assembly separates while driving, the vehicle will lose…
The defect. General Motors LLC (GM) is recalling certain 2018 Chevrolet Equinox and GMC Terrain vehicles and 2017-2018 GMC Acadia vehicles. The right front intermediate driveshaft may fracture and separate while driving.
What can happen. If the front right intermediate drive shaft assembly separates while driving, the vehicle will lose propulsion, increasing the risk of a crash. If the assembly separates while parked on a grade…
The free fix. GM will notify owners, and dealers will replace the right front intermediate drive shaft assembly, free of charge. The recall began August 25, 2017. Owners may contact GMC customer service at…
Crashes, fires and injuries owners reported
Out of 1,494 complaints against this generation, owners also reported:
- Crashes
- 97 (6.5%)
- Fires
- 22
- Injury reports
- 49
- Fatality reports
- 2
Equinox problems by model year
The 2018 drew the most complaints of this generation, 410, most of them about the brakes, and the 2024 the fewest, 80. A typical year drew about 184.
That makes the 2018 stand out at roughly 2.2 times a typical year (what a yearly count can and cannot say).
| Year | Complaints | With mileage | Median miles | Most reported | Recalls |
|---|---|---|---|---|---|
| 2018 | 410 | 188 | 22,000† | Brakes (118) | 5 |
| 2019 | 305 | 129 | 9,000† | Engine (100) | 4 |
| 2020 | 316 | 85 | 14,000 | Brakes (100) | 4 |
| 2021 | 100 | 26 | under 30 reports | Fuel and propulsion system (20) | 4 |
| 2022 | 184 | 42 | 17,000 | Fuel and propulsion system (79) | 6 |
| 2023 | 99 | 10 | under 30 reports | Fuel and propulsion system (46) | 3 |
| 2024 | 80 | 12 | under 30 reports | Fuel and propulsion system (23) | 1 |
What Equinox owners reported
The contact owns a 2018 Chevrolet Equinox. The contact stated that while her daughter was driving at 30 MPH with the contact seated in the front passenger seat, the contact attempted to open the retractable sunroof shade cover, which retracted only 6 inches. After several attempts, an abnormal loud sound was heard…
2018 · 30,000 miles · Visibility equipment
The contact owns a 2024 Chevrolet Equinox. The contact stated that while driving at 35 MPH, the accelerator pedal was depressed; however, the vehicle failed to accelerate intendedly. The "Engine Power Is Reduced" warning message displayed, and the vehicle lost motive power. The contact's minor child was a passenger in…
2024 · 50,000 miles · Fuel system
The contact owns a 2022 Chevrolet Equinox. While driving 45 MPH, the vehicle unintendedly decelerated to 20 MPH and lost motive power. The contact manually pulled over into a parking space. The vehicle was towed to an independent mechanic, and the fuel pump control module was replaced. The contact associated the…
2022 · 16,000 miles · Fuel system
The contact owns a 2021 Chevrolet Equinox. The contact stated that while driving 45 MPH, the vehicle started bucking and then stalled. The vehicle was towed to the dealer where it was diagnosed with a fuel pump power control module failure. The contact associated the failure with GM Recall: N252516900. The…
2021 · 21,000 miles · Fuel system
Built from 492 NHTSA complaints with mileage · snapshot 2026-10-20 · open data · how it is built
Other Equinox generations
- Equinox 2005–2009 2,035 reports with mileage, most about the electrical system
- Equinox 2010–2017 3,346 reports with mileage, most about the engine