2021 BMW I3S Parts
The 2021 BMW I3S came with 2 engines (647cc L2 ELECTRIC, 647cc L2 ELECTRIC/GAS), and the right parts depend on which one you have. We list 902 parts across all of them — each category page below covers every engine, and each row shows which engine(s) it fits.
Use the part number on every part as your anchor: match it to the number on your old part, or use it to cross-reference an aftermarket equivalent for an OEM part that's discontinued or overpriced.
Browse by Engine
647cc L2 ELECTRIC
414 parts · 14 categories Verified fitment647cc L2 ELECTRIC/GAS
488 parts · 16 categories Verified fitmentNot sure which engine you have? Check the emissions label under the hood, your registration, or decode the VIN — the 8th character usually identifies the engine.
Parts by Category
Body & Lamp Assembly Parts
52 parts · 10 subcategories · 10 brands Verified fitment Covers the exterior panels, bumpers, mirrors, lamps and the trim that keeps weather and road debris out.Brake & Wheel Hub Parts
421 parts · 17 subcategories · 34 brands Verified fitment Handles stopping power and keeps each wheel turning true on its bearing and hub assembly.Cooling System Parts
48 parts · 8 subcategories · 17 brands Verified fitment Keeps operating temperature in the narrow band the engine was designed for, from radiator and water pump to thermostat and hoses.Drivetrain Parts
19 parts · 5 subcategories · 5 brands Verified fitment Moves power from transmission to wheels through axles, CV joints, driveshafts, differentials and wheel-end hardware.Electrical Parts
15 parts · 4 subcategories · 6 brands Verified fitment Covers charging, starting and the sensors and modules the vehicle relies on, from alternator and starter to oxygen sensors.Electrical Switch & Relay Parts
29 parts · 7 subcategories · 9 brands Verified fitment Covers the switches, relays and flashers that route power to everything the driver touches.Engine Parts
25 parts · 12 subcategories · 12 brands Verified fitment Covers the internals and hard parts that build compression and keep oil where it belongs — gaskets, bearings, camshafts, lifters, seals and timing components.Exhaust & Emission Parts
18 parts · 5 subcategories · 8 brands Verified fitment Carries combustion gases out safely and keeps emissions equipment — catalytic converters, O2 sensors, EGR — doing its job.Fuel & Air Parts
10 parts · 6 subcategories · 9 brands Verified fitment Meters fuel and air — pumps, injectors, filters, intake components and the sensors that balance the mixture.Heat & Air Conditioning Parts
88 parts · 13 subcategories · 25 brands Verified fitment Keeps the cabin comfortable and the windshield clear through the compressor, condenser, evaporator, heater core and blower.Ignition Parts
11 parts · 3 subcategories · 6 brands Verified fitment Delivers spark at the right moment — plugs, coils, wires, distributors and ignition modules.Steering Parts
24 parts · 3 subcategories · 6 brands Verified fitment Connects driver to road through the rack, pump, tie rods, and column components.Suspension Parts
42 parts · 5 subcategories · 11 brands Verified fitment Controls ride, tire contact and alignment through shocks, struts, control arms, bushings and links.Automatic Transmission Parts
10 parts · 2 subcategories · 2 brands Verified fitment Covers the automatic gearbox and its supporting cast — filters, coolers, solenoids, mounts and torque-converter parts.Wheel Parts
28 parts · 3 subcategories · 6 brands Verified fitment Covers lug nuts, studs, hub caps, TPMS sensors and trim rings.Wiper & Washer Parts
62 parts · 2 subcategories · 6 brands Verified fitment Keeps the glass clear — blades, arms, linkages, washer pumps and nozzles.Each category page covers all 2 engine options for the 2021 BMW I3S — every part shows the engine(s) it fits, and an on-page filter narrows it to yours.
Confirm your configuration
Other BMW I3S Years
Getting Fitment Right on the 2021 BMW I3S
Most wrong-part orders for the 2021 BMW I3S trace back to the engine choice: with 2 options listed, components that look interchangeable — cooling parts, tensioners, mounts, sensors — often carry different part numbers per engine. Each row shows which engine(s) it fits, and each category page filters to one engine at a time.
Every part across the 16 categories shows its brand and manufacturer part number. Use the number to cross-reference: match it to the part coming off the vehicle, compare an OEM-supplier part against its aftermarket equivalent, or verify a shop's estimate line by line. When a number is discontinued, the same-fitment parts around it are the fastest path to a current replacement.
Frequently Asked Questions
How many parts fit the 2021 BMW I3S?
We list 902 parts for the 2021 BMW I3S, organized into 16 categories across 2 engine options. Every part includes the brand, manufacturer part number and fitment notes.
Which engines came in the 2021 BMW I3S?
Our records list 647cc L2 ELECTRIC, 647cc L2 ELECTRIC/GAS. Parts frequently differ between them — a part verified for one engine is not guaranteed to fit another — so identify your engine first (emissions label under the hood, or the VIN's 8th character), then use the engine filter on each category page.
Are OEM and aftermarket parts both available for the 2021 BMW I3S?
Yes — parts come from original-equipment suppliers and established aftermarket brands, shown side by side with their part numbers where both cover the same fitment. Cross-referencing those numbers is how you confirm an aftermarket part genuinely replaces the OEM one.
How do I verify a part number fits my 2021 BMW I3S?
Search the number on this site: the result shows the part, its brand and every configuration with published fitment. If your exact year, model and engine appear in that list, the number is a match. The notes column carries any remaining qualifiers — position, trim or production date.
Manufacturer names, model designations and part numbers are used for identification and fitment reference only. AutoFactsDB is an independent catalog and is not affiliated with, endorsed by, or sponsored by any vehicle manufacturer displayed on this page.