--- title: "2021 Hyundai Elantra Parts and Specs" description: "Everything for the 2021 Hyundai Elantra: oil type and capacity, battery group size, tire sizes, wiper blades, filters, service schedule, and common problems, verified, sourced, and in one place." url: "https://whichcarparts.com/cars/hyundai/elantra/2021" updated: "2026-08-21" --- # 2021 Hyundai Elantra parts and specs Everything you need to own and maintain this exact model year. Verified specifications, part numbers, and the problems that recur, in one place. CN7 (7th generation), 2021-2025, Compact sedan. ## Quick facts | Quick fact | Value | | --- | --- | | Engine oil | 0W-20, 4.5 qt (base engine) | | Battery | Group 35 (gas trims); H5 AGM on trims with idle Stop & Go, 500 CCA | | Tire size | 195/65R15 (base trim) | | Wiper blades | 26" / 16" | | Cabin filter | Hyundai 97133-L1000 (some sources still list 97133-F2000 as an alternate/superseding number, verify by VIN) | | Key fob battery | CR2032 | ## Specifications for the 2021-2025 Elantra ### Oil & filter Viscosity, capacity, filter part numbers, change interval [Read more](https://whichcarparts.com/cars/hyundai/elantra/2021-2025/oil). ### Battery BCI group size, cold cranking amps, AGM or flooded [Read more](https://whichcarparts.com/cars/hyundai/elantra/2021-2025/battery). ### Tires & wheels Factory sizes by trim, pressures, bolt pattern, lug torque [Read more](https://whichcarparts.com/cars/hyundai/elantra/2021-2025/tires). ### Wiper blades Driver, passenger and rear blade lengths [Read more](https://whichcarparts.com/cars/hyundai/elantra/2021-2025/wipers). ### Air & cabin filters Cabin and engine air filter part numbers, locations, intervals [Read more](https://whichcarparts.com/cars/hyundai/elantra/2021-2025/filters). ### Bulbs Headlight, fog and marker bulb types [Read more](https://whichcarparts.com/cars/hyundai/elantra/2021-2025/bulbs). ### Brakes Rotor diameters, pad references, service notes [Read more](https://whichcarparts.com/cars/hyundai/elantra/2021-2025/brakes). ### Fluids Transmission fluid, coolant, brake fluid and capacities [Read more](https://whichcarparts.com/cars/hyundai/elantra/2021-2025/fluids). ### Service schedule What's actually due at every mileage interval [Read more](https://whichcarparts.com/cars/hyundai/elantra/2021-2025/service-schedule). ### Problems & reliability Documented failures, recalls, and which years to avoid [Read more](https://whichcarparts.com/cars/hyundai/elantra/2021-2025/common-problems). ### Oil light reset Step-by-step maintenance light reset, no tools [Read more](https://whichcarparts.com/cars/hyundai/elantra/2021-2025/oil-reset). ### Key fob battery Which coin cell the remote takes [Read more](https://whichcarparts.com/cars/hyundai/elantra/2021-2025/key-fob-battery). ### Specs Towing, weight, fuel tank, fuel economy [Read more](https://whichcarparts.com/cars/hyundai/elantra/2021-2025/specs). These specifications are shared across every Elantra of the CN7 (7th generation) generation. See the [2021-2025 Hyundai Elantra overview](https://whichcarparts.com/cars/hyundai/elantra/2021-2025) for the full picture, or the [Hyundai Elantra guide](https://whichcarparts.com/cars/hyundai/elantra) to compare every generation. ## What changed for the 2021 Hyundai Elantra | Years | What changed | | --- | --- | | 2021 | CN7 generation launch; 2.0L MPI, Hybrid, and 1.6T N Line all available at launch | ## Known problems with the 2021 Hyundai Elantra 4 of the 6 issues we track for the 2021-2025 generation are documented against the 2021 model year. ### Front seat belt pretensioner may explode in a crash (recall) (major) Across three separate 2022 campaigns, Hyundai recalled 2020-2022 Elantra and Elantra HEV vehicles because the front driver- and/or passenger-side seat belt pretensioner can explode upon deployment in a crash, sending metal fragments into the cabin. Dealers replace the pretensioner(s) free of charge, a serious injury risk if left unaddressed. NHTSA 22V-123, 22V-218, 22V-354. Typical cost: Free under recall. ### Rearview camera image failure (recall) (moderate) A damaged printed circuit board in the rearview camera can cause the backup image to fail to display, removing a federally required safety feature exactly when it's most needed. Hyundai recalled 2021-2022 Elantra, Elantra HEV, and 2022 Elantra N vehicles (alongside Santa Fe models); dealers replace the camera assembly. NHTSA 24V-879. Typical cost: Free under recall. ### N Line/N 1.6T and 2.0T oil consumption and tick complaints (moderate) As with the AD generation's turbo engines, the CN7's Gamma 1.6T and 2.0T (Elantra N) draw owner reports of engine tick and above-average oil consumption, most commonly after 40,000-60,000 miles. Keep documented oil-change records and check dipstick level between changes; qualifying cars may be covered under Hyundai's extended engine warranty programs. Typical cost: $0 (top-offs, warranty) to $4,000+ for an out-of-warranty short block. ### Hybrid 12V auxiliary battery early failure (owner-reported) (minor) The small trunk-mounted 12V AGM battery on Hybrid models can die well before the high-voltage traction battery shows any issue, leaving the car unable to start even though the hybrid system itself is fine. Replacement is a straightforward AGM swap. Typical cost: $200-$350. 2 more issues are reported in other 2021-2025 years: Driver's airbag emblem may detach on deployment (recall) (2022-2023); EGR valve electrical short, loss of drive power (recall) (2024). Full detail, costs and sources on the [Hyundai Elantra problems and years to avoid](https://whichcarparts.com/cars/hyundai/elantra/common-problems) guide. ## Which engines were offered in the 2021 Elantra? | Engine | Trims | Oil | Oil capacity | | --- | --- | --- | --- | | 2.0L 4-cylinder MPI (Smartstream) | SE, SEL, SEL Convenience, Limited | 0W-20 | 4.5 qt | | 1.6L Hybrid (Smartstream + 6-speed DCT hybrid transaxle) | Blue, SEL, Limited (Hybrid) | 0W-20 | 4 qt | | 1.6L Turbo (Gamma T-GDI, N Line) | N Line | 0W-20 | 5.1 qt | ## About the Hyundai Elantra The Hyundai Elantra is a compact sedan that has spent the last decade and a half undercutting the Civic and Corolla on price while matching them on warranty coverage (Hyundai's 10-year/100,000-mile powertrain warranty follows the original owner). 0L Nu GDI in the sportier Coupe/GT/Sport trims), simple, chain-driven engines with a genuinely different reliability record than the Theta II engines that plagued Sonata/Santa Fe of the same era, though Hyundai still extended engine warranties for a subset of Nu-engine oil-consumption and knock complaints (the 2022 "Hyundai Engine II" class-action settlement). 0L cars whose piston oil rings weren't properly heat-treated. 0L turbo Elantra N hot hatch-turned-sedan (276 hp). Across all three generations the recurring theme for owners is Hyundai's aggressive recall posture, seat belt pretensioners, airbag inflators, an ABS module that could leak brake fluid and short internally (fire risk, recall 23V-651 covering 2011-2015 cars), and steering/brake-booster campaigns on early AD cars, most fixed free at the dealer. Maintenance itself is inexpensive and interval-driven: 5W-20 or 5W-30 oil in the naturally-aspirated engines (0W-20/5W-30 in the turbos and hybrid), a shared spin-on oil filter across nearly the whole lineup, and a CR2032 key fob battery throughout. For how the specifications changed across every generation, see the [full Hyundai Elantra guide](https://whichcarparts.com/cars/hyundai/elantra). ## Other Hyundai Elantra years - [2025](https://whichcarparts.com/cars/hyundai/elantra/2025) - [2024](https://whichcarparts.com/cars/hyundai/elantra/2024) - [2023](https://whichcarparts.com/cars/hyundai/elantra/2023) - [2022](https://whichcarparts.com/cars/hyundai/elantra/2022) - [2020](https://whichcarparts.com/cars/hyundai/elantra/2020) - [2019](https://whichcarparts.com/cars/hyundai/elantra/2019) - [2018](https://whichcarparts.com/cars/hyundai/elantra/2018) - [2017](https://whichcarparts.com/cars/hyundai/elantra/2017) - [2016](https://whichcarparts.com/cars/hyundai/elantra/2016) - [2015](https://whichcarparts.com/cars/hyundai/elantra/2015) - [2014](https://whichcarparts.com/cars/hyundai/elantra/2014) - [2013](https://whichcarparts.com/cars/hyundai/elantra/2013) - [2012](https://whichcarparts.com/cars/hyundai/elantra/2012) Data confidence for this generation: High confidence. ## Sources - [Ontario Hyundai, Elantra oil type & capacity by model year (2021-2026 engines)](https://www.ontariohyundai.com/service/service-and-parts-tips/hyundai-elantra-oil-type/) - [AMSOIL lookup, 2022 Elantra 2.0L Smartstream MPI oil spec/capacity](https://www.amsoil.com/lookup/auto-and-light-truck/2022/hyundai/elantra/2-0l-4-cyl-engine-code-g-g/) - [AMSOIL lookup, 2022 Elantra 1.6L Hybrid oil spec/capacity](https://www.amsoil.com/lookup/auto-and-light-truck/2022/hyundai/elantra/1-6l-4-cyl-engine-code-c-c/) - [AMSOIL lookup, 2022 Elantra N 2.0L Turbo oil spec/capacity](https://www.amsoil.com/lookup/auto-and-light-truck/2022/hyundai/elantra-n/2-0l-4-cyl-engine-code-h-h-turbo/) - [OilShop.ca, 2025 Elantra N oil type, capacity, filter](https://www.oilshop.ca/blog/2025-hyundai-elantra-n-oil-type-oil-filter-oil-change-interval-and-oil-capacity-information) - [Konig Wheels fit check, Elantra N factory wheel/tire fitment (245/35R19, 5x114.3)](https://konigwheels.com/blogs/fit-check/hyundai-elantra-n-fit-check) - [Michelin USA, Elantra N tire sizes and pressures](https://www.michelinman.com/auto/manufacturers/hyundai/elantra-n) - [Paragon/EBay, Elantra N 360mm front brake rotor OE diameter](https://paragonbrakes.com/paragon-2-piece-rotors-front-pair-360x30mm-hyundai-elantra-n/) - [NHTSA recall 22V-123/22V-218/22V-354, seat belt pretensioner explosion risk](https://api.nhtsa.gov/recalls/recallsByVehicle?make=hyundai&model=elantra&modelYear=2022) - [NHTSA recall 24V-879, rearview camera failure](https://api.nhtsa.gov/recalls/recallsByVehicle?make=hyundai&model=elantra&modelYear=2022) - [NHTSA recall 24V-308, EGR valve electrical short](https://api.nhtsa.gov/recalls/recallsByVehicle?make=hyundai&model=elantra&modelYear=2024) - [fueleconomy.gov, 2022 Elantra EPA ratings (all trims incl. Hybrid, N)](https://www.fueleconomy.gov/feg/bymodel/2022_Hyundai_Elantra.shtml) - [Edmunds, 2022 Elantra Hybrid specs (curb weight, fuel tank, mpg)](https://www.edmunds.com/hyundai/elantra/2022/hybrid/features-specs/) - [Cabin air filter 97133-L1000 fitment (2021-2022 Elantra)](https://www.ebay.com/itm/227409746681) Specifications vary with engine option, production date, and market.