Fiat500X2021Overview/fiat/500x/2021/base/

2021 Fiat 500X

Factory specifications, fluid capacities, torque values, EPA fuel economy and the federal safety record for the 2021 500X.

Transmission Automatic 9-spd

The 2021 Fiat 500X arrives as a subcompact crossover equipped with a nine‑speed automatic transmission and delivers an EPA rating of 24 mpg city, 30 mpg highway and 26 mpg combined. Its powertrain and chassis inherit the evolutionary refinements of the 500X line, while the fuel‑efficiency figures place it among the more economical options in its segment. Within the model’s complaint record spanning 2016‑2023, the lowest annual complaint count—just two—was logged in 2020, and the 2021 model follows that trough, suggesting that the vehicle benefits from the recent gains in reliability observed across the generation.

Model year2023202220212020

Quick specs

Fluid capacities, tune-up values and fuel economy at a glance.

Lug nut torque89.0 ft-lbsOEM · verified
EPA fuel economy24/30/26 mpgEPA · verified

Fitment & sizes

Replacement part sizes and factory part numbers — battery, bulbs, filters and belts.

From the factory this vehicle uses a BCI Refer to the appropriate service information for options and battery usage. battery, OE oil filter 68439517AA. Each part links to every other vehicle that shares it, so a part you already stock may fit more of your fleet than you'd expect.

Battery groupBCI Refer to the appropriate service information for options and battery usage.OEM · verified
Tail / brake / turnLAMPOEM · verified
Tire size215/60R17 96HOEM · verified
Wheel / rim7 inOEM · verified

OE service part numbers OEM · verified

Engine oil filter68439517AA
Engine air filter68377763AA
Spark plug68644215AA
Front wiper blades68418003AA alt 68418163AA
Thermostat68498366AA
Cabin air filter68535620AA

Full specifications

Engine, drivetrain, dimensions and economy.

Engine & drivetrain NHTSA vPIC

TransmissionAutomatic 9-spd

Dimensions & weight NHTSA vPIC

Overall length167.7 in
Overall width70.9 in
Overall height63.4 in
Wheelbase101.2 in
Curb weight3278 lb
Track (front / rear)60.6 / 60.6 in
Weight distribution (front / rear)61/39

Ratings & economy EPA / vPIC

EPA city / highway / combined24 / 30 / 26 mpg
DrivetrainAll-Wheel Drive
Recommended fuelRegular Gasoline

Service quick specs OEM factory data

Capacities, torques and tune-up values from the factory service manual.

Torque lug nuts to 89.0 ft-lbs. The firing order is 1-3-4-2.

Lubricants & capacities

Engine CoolantMopar OAT MS 90032
Engine Coolant Capacity8.8 qt

Engine torques

Cylinder Head InstructionsOnly use new fasteners tightened evenly.

Chassis torques

Lug Nuts89.0 ft-lbs

Ignition

Cylinder Firing Order1-3-4-2
Spark Plug ManufacturerFiat
Spark Plug Gap.026 in
Spark Plug Torque13.0 ft-lbs

Battery & A/C

RefrigerantR1234yf
Refrigerant Capacity.88 lbs
Oil Capacity4.4 oz

Brakes

Brake Caliper Bolt to Carrier TorqueFront: 20.0 ft-lbs; Rear: 26.0 ft-lbs
Brake Caliper Carrier to Hub Bolt TorqueFront: 122.0 ft-lbs; Rear: 42.0 ft-lbs
ABS Sensor Torque6.2
Vented Rotor Minimum Thickness for ReplacementFront: 11; Rear: .394
Maximum Rotor Runout.0008"

Multi-step torque procedures OEM · verified

Camshaft Bearing/Carrier Cap Bolts or Studs — tightening sequence 1 stages
144.0 inch lbs., Step 2: 89.0 inch lbs.44 in
Crankshaft Pulley and/or Damper Bolts — tightening sequence 1 stages
115.0 ft. lbs., Step 2: 170°15 ft. lbs
Cylinder Head — tightening sequence 1 stages
122.0 ft. lbs., Step 2: 90°, Step 3: 90°22 ft. lbs
Intake Manifold to Engine Bolts — tightening sequence 1 stages
13.7 ft. lbs., Step 2: 12.03.7 ft. lbs
Main Bearings — tightening sequence 1 stages
1M8 Bolts 1-10106 in

Factory maintenance schedule OEM · verified

Normal service, condensed from the factory interval matrix.

Under the factory schedule, replace the spark plugs every 40,000 mi; coolant at 150,000 mi. The big-interval services (at 150,000 mi for coolant, and the transmission fluid) are the ones owners most often skip — on a lower-mileage example, assume the original fluids are still in it and check them first.

At 10,000 miUnderbody (inspect) · Windshield Washer System (inspect) · Windshield Wiper Blade (inspect)
Every 10,000 miBattery (inspect) · Brake System (inspect) · CV Joint Boot (inspect) · Cabin Air Filter (replace) · Driveshaft U-Joint (inspect) · Engine Coolant System (inspect fluid level)
Every 20,000 miBody Latches, Locks & Hinges (lubricate) · Engine Air Filter Element (replace) · Suspension System (inspect) · Tie Rod (inspect) · Underbody (inspect) · Windshield Washer System (inspect)
Every 40,000 miDifferential (inspect fluid level) · Spark Plugs (replace) · Transfer Case Assembly (inspect fluid level)
At 80,000 miDrive Belt Tensioner (inspect)
Every 100,000 miPCV Valve (inspect)
At 150,000 miAccessory Drive Belt (inspect) · Drive Belt Tensioner (inspect) · Engine Coolant System (drain, flush & refill)

Owner how-tos

Condensed service procedures for routine maintenance. Procedures that require dealer diagnostic equipment are identified and summarized only.

Common procedures

Key fob — remote (RKE) programming programming new fob buttons Dealer tool OEM · verified
Tool requiredDRBIII scan tool (dealer / locksmith)
WhyTransmitter codes are written into the receiver in the passenger door module
Anti-theft (SKIS) — module initialization after immobilizer module replacement Dealer tool OEM · verified
When neededAfter Sentry Key Immobilizer Module (SKIM) replacement
Tool requiredDRBIII scan tool
Also requiredThe vehicle's four-digit PIN code

Reliability & federal safety record

Owner-reported issues, recalls, investigations and service bulletins on record with NHTSA — an unfiltered look at what owners actually experience.

1
Open recalls
NHTSA campaigns
50
Service bulletins
Manufacturer communications
0
ODI investigations
Office of Defects Investigation
0
Owner complaints
0 involved a crash · 0 a fire
NHTSA crash-test rating federal NCAP · out of 5 stars
Overall★★★★★
Frontal★★★★★
Side★★★★★
Rollover★★★★★
Owner complaints by model year NHTSA · this generation & adjacent

No owner complaints on record with NHTSA for this vehicle.

Recalls NHTSA · verified

Showing 1 of 1 campaigns on record for this vehicle.

24V510000Air Bags:FrontalReported 03/07/2024

Chrysler (FCA US, LLC) is recalling certain 2017-2024 Alfa Romeo Giulia, 2018-2025 Alfa Romeo Stelvio, 2019-2023 Fiat 500X, Jeep Renegade, and 2024 Fiat 500E vehicles. A seat belt buckle switch sensor may be improperly… Remedy: Dealers will repair the connection, free of charge. Owner notification letters were mailed beginning August 27, 2024. Owners may contact FCA US, LLC customer service at…

Technical service bulletins NHTSA · verified

Showing 5 of 50 bulletins on record with NHTSA.

BulletinDateComponentSummary
S1408000384 REV.I2026-02-14Electrical SystemStart Stop Charging Warning Lamp Illuminated On, Intelligent Battery Sensor (IBS) State…
21-040-252025-10-02Power Train948TE Transmission Reaction Shaft Service Bushing Kit Customers may experience a…
91006242025-07-08EngineVerify Reman part number availability. Order the "R" part number for all orders:
18-028-252025-06-05Unknown Or Other"Check Engine Light Illuminated - Erroneous Fault Codes Set Customers must experience a…
S14080003842024-01-10Electrical SystemStart Stop Charging Warning Lamp Illuminated On, Intelligent Battery Sensor (IBS) State…

Common OBD-II trouble codes

The most common OBD-II codes for this vehicle's emissions system. These are standardized SAE J2012 definitions, not vehicle-specific fault reports.

P0420
Catalyst system efficiency below threshold — Bank 1
P0300
Random / multiple cylinder misfire detected
P0171
System too lean — Bank 1
P0455
Evaporative emission system leak detected — large leak
P0128
Coolant thermostat below regulating temperature
P0442
Evaporative emission system leak detected — small leak

VIN tools

Decode factory build data for a specific vehicle by VIN.

VIN
Decode a VIN to confirm the transmission and build data for a specific 500X. OEM
Build data
Plant, GVWR class, engine and body data for any 17-character VIN.
Recalls
Check open recall campaigns against a specific vehicle by VIN.

Vehicles with shared specs

Find every vehicle that shares this one's battery, bulbs, oil capacity, platform or parts.

Reference guides

Cross-vehicle references for the kinds of data on this page.

Frequently asked

Does the 2021 500X have open recalls?

NHTSA lists 1 recall campaign(s) for this model year. Check your specific vehicle by VIN.

What gas mileage does the 500X get?

EPA figures are 24 city / 30 highway / 26 combined mpg.