Engine Oil
0W-20
Full Synthetic
Capacity
4.2 qt
with filter
3.8 qt without filter
Oil Filter
26300-35505
Kia (OEM)
The 2021 Kia Seltos takes 0W-20 Full Synthetic with a total capacity of 4.2 quarts (filter included). You’ll need a 17mm socket for the drain plug, torqued to 35 Nm. The OEM oil filter is the Kia 26300-35505. Note: this vehicle has 2 active recalls — check the recalls section below. Below you’ll find complete maintenance specs, fluid capacities, parts, and links to buy what you need.
⚑ QUICK DIY TIPS FOR THE 2021 KIA SELTOS
Torque your drain plug to 35 Nm (26 ft-lbs) to avoid leaks or stripped threads. Using the OEM filter (Kia 26300-35505) is recommended for warranty compliance. Always use 0W-20 Full Synthetic as specified by Kia — using the wrong viscosity can void your powertrain warranty. Check the maintenance schedule below for your next service interval. Viscosity 0W-20
Oil type Full Synthetic
Capacity (with filter) 4.2 qt
Capacity (w/o filter) 3.8 qt
Filter Options
Kia OEM spin-on 26300-35505 (supersedes 26300-35500 / 35501 / 35502 / 35503): Gamma / Nu / Theta II 1.6-2.4 4-cyl and the 2.0 T-GDI (Forte, Optima, Soul, Sportage, Sorento 2.4, Stinger 2.0T)
Drain Bolt & Hardware
Socket size 17 mm
Torque spec 35 Nm
Gasket Crush washer (aluminum)
Type SP-IV
Capacity 3.5 qt
Change interval 60,000 mi
DOT type DOT 3
Change interval 45,000 mi
Type Long Life
Color Green
Capacity 6.5 qt
Change interval 120,000 mi
Spark Plugs
Type Iridium
Gap 0.044
Quantity 4
Change interval 100,000 mi
Tires
Size 215/55R17
Front pressure 33 PSI
Rear pressure 33 PSI
Wiper Blades
Kia 00009ADU18KA passenger
Buy Kia 983612V000 passenger
Buy Kia 98360Q5000 passenger
Buy 5k mi 7.5k mi 10k mi 15k mi 20k mi 30k mi 50k mi 60k mi 90k mi 100k mi
≈ every 6 months
▸ Change Engine Oil & Filterspark plug
14mm thread, aluminum head
18 ft-lb · 24.4 Nm
21V259000
Kia Motors America (Kia) is recalling certain 2020-2021 Soul, and 2021 Seltos vehicles equipped with 2.0L Nu MPI engines. The piston oil rings may not have been properly heat-treated, which may result in engine damage.
25V099000
Kia America, Inc. (Kia) is recalling certain 2021-2023 Seltos and Soul vehicles. The piston oil rings may have been manufactured incorrectly, which can result in engine damage.
All categories ELECTRICAL SYSTEM STRUCTURE:BODY STEERING ELECTRICAL SYSTEM:SOFTWARE EQUIPMENT:ELECTRICAL:RADIO/TAPE DECK/CD ETC. EQUIPMENT:ELECTRICAL POWER TRAIN ENGINE AND ENGINE COOLING SERVICE BRAKES, HYDRAULIC:FOUNDATION COMPONENTS:DISC:CALIPER EQUIPMENT ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE (ECU/ECM) LANE DEPARTURE: SENSING SYSTEM: CAMERA ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL EQUIPMENT:OTHER:LABELS LANE DEPARTURE: SENSING SYSTEM: OTHER SEATS EXTERIOR LIGHTING EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL EQUIPMENT:ELECTRICAL:INFOTAINMENT:SOFTWARE ENGINE ELECTRONIC STABILITY CONTROL:AUTOMATIC (ASC) SUSPENSION ELECTRICAL SYSTEM: INSTRUMENT CLUSTER/PANEL BACK OVER PREVENTION: WARNINGS
TSB_ELE422 ELECTRICAL SYSTEM 2026-05-28
TECHNICAL SERVICE BULLETIN: INFOTAINMENT SYSTEM SOFTWARE UPDATE USING UPDATE.KIA.COM - This bulletin provides information and service procedures for updating the infotainment systems on applicable Kia vehicles using the Kia Navigation Updater available at update.kia.com. The software update may improve system performance, enhance existing features, and apply the latest operating software for supported vehicles (2021-2026MY All Models).
CS2312_TSB_R2 STRUCTURE:BODY 2026-06-08
TECHNICAL SERVICE BULLETIN: CUSTOMER SATISFACTION: THEFT DETERRENT IGNITION CYLINDER PROTECTOR AND DECAL INSTALLATION (CS2312) - This bulletin has been revised to include additional information. New/revised sections of this bulletin are indicated by a black bar in the margin area. This bulletin provides information to install a Theft Deterrent Ignition Cylinder Protector on certain 2010-2022MY Kia vehicles outlined on page 20, which may not have been equipped with an immobilizer and whose Integrated Body Control Unit (IBU) / Body Control Module (BCM) did receive the Anti-Theft Software Logic upgrade under CS2301/02/03/04/05/06/07/08/09 TSBs. In an effort to help prevent thefts of Kia vehicles, a protective cover will be permanently affixed to the ignition cylinder. This Theft Deterrent Ignition Cylinder Protector prevents the removal of the key lock cylinder thereby preventing access to the ignition tumbler.
PS648 ELECTRICAL SYSTEM 2020-02-07
PITSTOP: OVERHEAD CONSOLE UVO/INFO BUTTONS - This Pitstop provides information regarding the functionality of the overhead console UVO buttons on some 2021MY Seltos SX (SP2) vehicles. With UVO Link activated, customers may experience and 'UVO' and 'INFO' buttons with reversed functionality relative to published customer education materials. Only the Seltos SX trim level is equipped with these buttons and functions. There are no other issues with functionality and this Pitstop is published for awareness of dealership personnel until this issue is resolved. This
Show all 134 TSBs(+131) Private Party
$15,504–$17,136
Dealer Retail
$17,952–$20,400
Estimated values assume average condition and mileage for vehicle age.
Source: estimated
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