If you’re hunting for a BMW i3 REx for sale, you’re probably looking for a city-sized EV that kills range anxiety without giving up electric driving. The BMW i3 Range Extender is a quirky carbon-fiber hatchback with a tiny gas backup engine, part EV, part security blanket. This guide walks you through model years, range, pricing, reliability, and how to shop smart so you end up with an i3 REx that fits your life instead of your repair shop.
A quick note on availability
Why the BMW i3 REx is Still Interesting in 2025
BMW i3 REx at a Glance
The i3 was BMW’s first purpose-built EV. Instead of stuffing batteries into a regular hatchback, BMW built a carbon-fiber passenger cell, rear-mounted motor, and ultra-light structure. The REx version adds a motorcycle-derived two-cylinder gasoline engine that acts as a generator when the battery gets low. You still drive on electric power, but that little engine keeps you moving if a charger is out of reach.
What Makes the i3 REx Different From Other Used EVs?
Three big reasons shoppers still search for BMW i3 REx for sale.
Perfect city footprint
Carbon-fiber safety cell
Range anxiety insurance
Tip for shoppers
BMW i3 REx Basics: How the Range Extender Works
The BMW i3 REx is not a typical plug‑in hybrid. The rear wheels are always driven by the electric motor. The small gasoline engine is just a generator that feeds the battery when state of charge drops to a low threshold.
What happens in everyday driving?
- You plug in and charge the high-voltage battery just like any EV.
- The i3 drives purely on electricity until the battery gets low.
- You can use AC Level 2 charging at home or DC fast charging on the road (for cars equipped).
What happens when the battery is low?
- At a low state of charge, the REx engine automatically starts and powers a generator.
- The generator supplies energy to keep the battery from dropping further.
- You keep driving, just with more engine noise and slightly reduced performance on long hills.
Important to understand
Model Years, Batteries & Real-World Range
If you’re comparing BMW i3 REx for sale listings, you’ll see references to 60 Ah, 94 Ah, and 120 Ah batteries. Those numbers refer to the cell capacity and roughly map to three generations of usable battery size and range.
BMW i3 REx Battery & Range by Generation
Approximate EPA-rated electric and total range figures for U.S. models.
| Battery pack / years | Approx. usable capacity | EPA electric range (REx) | EPA total range (EV + gas) | Notes |
|---|---|---|---|---|
| 60 Ah (2014–2016) | ~18.8 kWh | ~72 mi | ~150 mi | Shortest range; early tech, often cheapest on the used market. |
| 94 Ah (2017–2018) | ~27.2 kWh | ~97 mi | ~180 mi | Big step up in daily usability; good sweet spot for value. |
| 120 Ah (2019–2021) | ~37.9 kWh | ~120–126 mi | ~200 mi | Most range, newest cars, and typically higher prices. |
Later i3 REx models get noticeably more electric range and slightly more total range.
Real-world range vs. ratings
BMW i3 REx Pricing: What to Expect Today
Exact prices for a BMW i3 REx for sale will depend on mileage, condition, battery pack, options, and local demand. But you can think in broad bands when you’re browsing classifieds or marketplaces:
- 2014–2016 60 Ah REx: typically the least expensive, often appealing if you have a short commute and solid charging access.
- 2017–2018 94 Ah REx: middle of the pack on price, but often the best balance of cost and daily range.
- 2019–2021 120 Ah REx: usually command the strongest prices because they’re newer, have more range, and often fewer miles.
Value tip
Common BMW i3 REx Issues to Watch For
Overall, the i3 has a solid reputation among owners, but the REx version adds a gasoline engine and fuel system that require more attention. Here are the problem areas you’ll want to know about when evaluating a BMW i3 REx for sale:
Known Trouble Spots on the i3 REx
Not every car will have these problems, but they’re worth checking for.
REx engine & fuel system
A/C compressor failures
Motor mounts & driveline
Electronics & warning messages
When to walk away
"Our 2017 i3 REx has been one of the least fussy daily drivers we’ve run, as long as we treated the little engine like any other BMW and stayed ahead on maintenance."
Battery Health: The #1 Thing to Check on Any i3 REx
The high‑voltage battery pack is the heart of any i3. Even with the REx safety net, a tired battery means shorter EV range, more engine runtime, and a car that feels older than it is. Unlike mileage, battery health varies wildly between cars depending on climate, charging habits, and how they were driven.
How to Evaluate Battery Health on a BMW i3 REx
Ask for a recent battery health report
A proper test looks at state of health (SoH), not just what the dash shows after a charge. On Recharged, every car includes a Recharged Score battery health diagnostic so you know how the pack is aging.
Compare indicated range to original specs
On a full charge, a 94 Ah i3 REx showing 75 miles in mild weather is telling you something very different than one showing 100+. Large gaps can hint at degradation or just very aggressive recent driving.
Check charging history if available
Frequent DC fast charging, especially in hot climates, can stress packs. A car that mostly lived on Level 2 home charging often ages more gracefully.
Look for warning lights or charging errors
Any history of “Drivetrain malfunction,” charging errors, or sudden range drops deserves a closer look from a technician familiar with BMW EVs.
Consider climate and storage
Cars that lived in very hot regions, parked outside, can see more degradation. A garaged, moderate‑climate i3 is usually the safer bet.
How Recharged reduces the guesswork
Quick Spec Checklist When You See an i3 REx for Sale
When you’re scrolling through BMW i3 REx for sale listings, it’s easy to get lost in colors and options. This checklist keeps you focused on the details that actually matter for ownership.
Essential Checks Before You Commit
Confirm it’s truly a REx model
Some listings blur BEV and REx versions. The REx has an extra fuel filler door on the front passenger side and “Range Extender” in the original window sticker or build sheet.
Identify battery generation
Look at the model year and trim to determine whether it’s 60 Ah, 94 Ah, or 120 Ah. Later batteries mean more EV range and generally stronger resale.
Verify DC fast charging (SAE Combo)
Most 2015+ U.S. cars have CCS DC fast capability, but double‑check. It’s extremely useful if you plan road trips, even with the REx onboard.
Review service history
Ideally you’ll see regular oil changes for the REx, brake fluid flushes, cabin filter changes, and documented warranty or recall work.
Inspect tires and wheels
The i3 uses narrow, model‑specific tires. Replacements aren’t outrageous but they’re not Civic‑cheap either. Worn or mismatched rubber is a negotiation point.
Scan for stored codes
A pre‑purchase inspection that includes a scan of BMW‑specific codes can spot brewing issues with the REx, motor electronics, or battery management.
Who the BMW i3 REx Is Perfect For (and Who It Isn’t)
Great fit if you…
- Have a daily round trip under ~70–90 miles and can charge at home or work.
- Live in a city or suburb where compact size and easy parking matter.
- Want to go mostly electric but still value a gas safety net.
- Appreciate distinctive design and don’t mind standing out at the grocery store.
Maybe not ideal if you…
- Regularly drive several hundred miles at highway speeds and rarely plug in.
- Need lots of cargo space or more than four seats with full‑size doors.
- Don’t have anywhere to install or access Level 2 charging.
- Are allergic to quirky interiors and unusual materials.
Think about your longest regular trip
How Recharged Helps You Buy a Used i3 REx With Confidence
Buying a used EV can feel opaque, especially one with both a high‑voltage battery and a gasoline range extender. Recharged is built to make that process simpler and more transparent.
What You Get When You Shop an i3 REx on Recharged
More than just a listing feed.
Recharged Score Report
Help with trade‑ins & offers
Financing & delivery
Ready to find your next EV?
Browse VehiclesPre-qualify without the stress
BMW i3 REx for Sale: Frequently Asked Questions
Frequently Asked Questions About Buying a BMW i3 REx
Bottom Line: Is a Used BMW i3 REx a Good Buy?
If you’re searching for a BMW i3 REx for sale, you’re looking at one of the most interesting small EVs of the last decade, lightweight, cleverly engineered, and designed from the ground up as an electric city car. The REx adds a layer of flexibility that pure‑EV hatchbacks can’t match, especially if your charging situation isn’t perfect yet.
The keys to a great ownership experience are battery health, the right battery generation, and a well‑maintained REx engine. Take the time to verify those pieces, lean on expert inspection and diagnostics, and don’t be afraid to walk away from cars with incomplete histories or unresolved warning lights.
If you’d like to take the guesswork out of it, exploring i3 REx and other used EV listings on Recharged gives you access to transparent pricing, Recharged Score battery reports, financing, trade‑in options, and nationwide delivery, so you can focus less on the unknowns and more on enjoying a genuinely distinctive electric car.
