2021 Used BMW Engines For Sale

20
verified 2021 BMW engines
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Up to 3 yrs
extended warranty available
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shipment

2021 Used BMW Engines For Sale

20 verified used 2021 BMW engines in stock — B46/B48 2.0L TwinPower Turbo-4, B58 3.0L TwinPower Turbo Inline-6 in both standard and M Performance tune, the S55 M twin-turbo six from the M2 Competition, and the N63 4.4L hot-vee V8 from the M50i cars. 2021 is a modular-engine year, so the engine code on the block — not the litre figure on the badge — decides what bolts in. Every unit is VIN-matched to your vehicle, ASE-tested by certified technicians, photographed before shipment, and backed by a warranty (standard term by model year, extended coverage up to 3 years) plus 30-day money-back. Free freight nationwide.

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Warranty On Every Unit
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Photos Before Shipment
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ASE-Tested & Verified
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Free Nationwide Shipping
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30-Day Money-Back
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2021 BMW Engine Families

Which engine sits under which 2021 BMW, and how many of each we hold today.

Engine family Fits (2021) In stock
B46/B48 2.0L TwinPower Turbo-4 228i Gran Coupe, 230i and 230i xDrive, 330i RWD (VIN 1) and 330i xDrive (VIN 7), X1 xDrive28i, X2 xDrive28i (228 hp), X4 xDrive30i 10
B58 3.0L TwinPower Turbo Inline-6 740i and 740i xDrive, X5 xDrive40i (without plug-in hybrid), X7 xDrive40i 4
B58 3.0L high output (M Performance) M240i and M240i xDrive, X3 M40i — own turbo, pistons and cooling pack, not interchangeable with a 40i 3
N63 4.4L TwinPower Turbo V8 X5 M50i and X7 M50i — hot-vee V8 with the turbochargers inside the vee 2
S55 3.0L M Twin-Turbo Inline-6 M2 Competition — closed-deck M-division block, separate oil and cooling circuits from the B58 1
Total 20

Other BMW Model Years

Every model year we hold BMW engines for. Years without a link are in stock but have no year page yet — text us your VIN.

2024202320222021
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Why Buy a 2021 BMW Engine from Auto Power Source

2021 is the year BMW's modular engine range is at its widest, and that is exactly why the engine code matters more than the displacement. A 2021 3.0L can be a standard B58 out of a 740i, X5 xDrive40i or X7 xDrive40i; a high-output B58 out of an M240i or X3 M40i, with its own turbocharger, pistons and cooling pack; or the S55 out of the M2 Competition, which is a different M-division block entirely. A 2.0L can be a B46 or a B48, transverse in an X1, X2 or 228i Gran Coupe and longitudinal in a 230i, 330i or X4. Nothing about the badge tells you which — the code does.

All 20 of our 2021 BMW engines were pulled from low-mileage donor vehicles, cataloged by VIN and chassis code (G20, G29, G42, G01, G02, G05, G07, G11, F39, F44), and held in our climate-controlled warehouse. Each one went through our six-step inspection: VIN-matching against your chassis, compression and leak-down testing by ASE-certified technicians, noise and smoke verification on the test stand, visual inspection of the turbo plumbing, VANOS solenoids and oil-feed lines, multi-angle photography sent for your approval, and palletized shipping.

Drivetrain is the other 2021 split that bites. The 330i is listed by its sixth VIN digit — 1 for RWD, 7 for xDrive — because the oil pan and front sump geometry differ, and an xDrive pan will not clear a RWD subframe or the other way round. The xDrive28i and xDrive30i four-cylinders are transverse or longitudinal depending on platform. You pay a fraction of dealer-new pricing for the same BMW engineering, ship free on a heavy-duty pallet anywhere in the continental U.S., and get 30 days from delivery to return for any reason — no restocking fees. Across 100K+ engines and transmissions in stock, our fitment-related return rate sits at 0% because we verify before we send.

📱 Fastest way to match: text us your VIN, get options in minutes.Text Your VIN →

Your 2021 BMW Engine Options: Compared

Most 2021 BMW owners face four real choices when the engine fails:

← Swipe sideways to see all columns →
Option Cost Reliability Warranty Fitment Match
Used OEM (this collection) $$$ Best Value High — tested Included VIN-matched
New OEM (dealer) $$$$$ 2-4× more High Manufacturer Exact
Aftermarket / Reman $$$$ Varies 6-12 mo May adapt
Junkyard $ Cheapest Unknown None DIY

Tested used OEM hits the sweet spot — same engineering as new, fraction of the cost.

2021 BMW Engine Buying Guide

5 things to verify before buying a used 2021 BMW engine:

  1. Match the engine code, not the litre figure. On a 2021 BMW the same 3.0L covers the standard B58, the high-output B58 in the M240i and X3 M40i, and the S55 in the M2 Competition. The 2.0L covers both B46 and B48. The code decides the turbo, the pistons, the cooling pack and the harness — the badge decides none of it.
  2. Separate standard B58 from the M Performance B58. A 40i B58 and an M240i or M40i B58 share a family name and almost nothing else that matters for a swap: different turbocharger, different pistons, different charge cooling, different ECU mapping. They are not interchangeable in either direction, and we hold both in 2021.
  3. Specify RWD or xDrive. Our 2021 330i listings carry the sixth VIN digit for this reason — 1 for rear-wheel drive, 7 for xDrive. Oil pan and front sump shape differ, so the wrong one will not clear the front differential or driveshaft. The same split runs through the 230i, M240i and 740i.
  4. Confirm the chassis, not just the model name. 2021 straddles BMW platform changes: the 2 Series exists as the F44 Gran Coupe, the F22-generation M2 and the new G42 230i, and the X5 and X7 are G05 and G07 with 48V mild-hybrid starter-generators on the sixes. Brackets, harnesses and ancillaries follow the chassis code, so the chassis has to match before the engine code is even worth checking.
  5. Confirm the match with your own VIN before you order. Your VIN settles the engine code, the tune, the chassis and the drivetrain in one step. Text it to +1-307-441-5554 and we will confirm in writing exactly which unit fits your vehicle before you pay.

Our ASE-certified technicians verify every one of these points against your VIN before any unit ships.

📞 Need help choosing the right 2021 BMW engine? Talk to our team live.Call 1-877-313-8995

Frequently Asked Questions

How many 2021 BMW engines do you have in stock?
20 verified 2021 BMW engines, live as of this page build — 10 B46/B48 2.0L TwinPower Turbo-4, 4 standard B58 3.0L inline-6, 3 high-output B58 (M240i and X3 M40i), 2 N63 4.4L twin-turbo V8 and 1 S55 3.0L from the M2 Competition. The count on this page is the live active figure, never a catalogue total.
Which 2021 BMW models do you cover?
230i, 330i, M240i, 740i, X5 and X7 with two units each, plus the 228i Gran Coupe, M2, X1, X2, X3 and X4 with one each. The model tiles above carry the live count for every one of them.
Is a 2021 B58 the same engine as an M240i B58?
No. The standard B58 in a 740i, X5 xDrive40i or X7 xDrive40i and the high-output B58 in an M240i or X3 M40i carry different turbochargers, pistons, charge cooling and ECU mapping. They are listed as separate families on this page and are not interchangeable. Text your VIN to +1-307-441-5554 and we will confirm which tune your car came with.
What is the warranty on a used 2021 BMW engine?
Every 2021 BMW engine ships with a warranty included — 6 months standard for 2001 and newer, printed on each product page. Extended coverage of up to 3 years is available at checkout.
What does ASE-tested mean?
ASE-certified technicians compression-test every cylinder and run leak-down evaluation on engines. Plus noise & smoke verification, visual inspection of the turbo plumbing and oil-feed lines, and multi-angle photography before shipment.
Do I need my VIN for a 2021 BMW engine?
Yes — more so in 2021 than in almost any other BMW year. The displacement is shared across B46/B48, standard and high-output B58, and S55, and the drivetrain split changes the oil pan. Text your VIN to +1-307-441-5554 and we will confirm the exact unit before you pay.
How long until delivery?
Prep and ship time is 3-5 business days. Transit is 2-3 business days after dispatch via freight carrier — typically 5-8 business days from order to delivery.
When can I reach customer service?
Call 1-877-313-8995 or text +1-307-441-5554 during the business hours shown in the site footer, or email info@autopowersource.com any time.
🏆 Earn $500 with Our Rewards Program
Every BMW engine you buy earns rewards. 10 orders (yours or referred) = $500 cash credit. Silver, Gold, and Platinum tiers with discounts, priority support, and private inventory access.
See How Rewards Work →
100K+
Engines+Transmissions In Stock
0%
fitment-related returns
All 50
states covered, free freight
36
brands covered

Our 6-Step Inspection & Shipping Process

Every 2021 BMW engine we ship has been through these six steps:

1. VIN-Matching
We match the donor VIN to your VIN to confirm engine code, chassis code, LCI status, and drivetrain fit.
2. Tested & Verified
ASE-certified technicians compression-test every cylinder and run leak-down evaluation on engines. Transmissions are Shift-Tested through all gears.
3. Noise & Smoke Verification
Units are run to verify normal mechanical sound and clean operation — catches internal wear static tests miss.
4. Visual Inspection
Every accessible component is inspected: turbos, manifolds, VANOS solenoids, oil-feed plumbing, accessories, sensor harnesses.
5. Photograph & Catalog
Multi-angle photos sent to you BEFORE we ship for your approval.
6. Palletize & Ship
Strapped on a heavy-duty wooden pallet, shipped via freight at no charge.

Our Photos-Before-Shipment Guarantee

Before any engine leaves our warehouse, we send you multi-angle photographs. You approve. If you do not approve, you get every dollar back — no questions, no restocking fees, no return freight charges. On top of 30-day money-back and the warranty included with every unit. Browse all 20 2021 BMW engines below.

✉ Email Us at info@autopowersource.com
No match? Text VIN →