Tuning · BMW X3 28i (F25)
X3 28i
N20
The N20 in F25 X3 28i form, the SAV with the 2.0L turbo four. Hand-calibrated from Stage 1 through to a hybrid-turbo build.
Engine
N20
Stock
245 bhp · 350 Nm
Stage 3 ceiling
245 bhp
About this tune
The F25 X3 xDrive28i (2011-2017) is the N20 in BMW's mid-size SUV body, same engine and ECU as the 328i and 428i, in a taller xDrive body. Stock is 245 bhp / 350 Nm, sent through the ZF 8HP. The four-cylinder X3, chosen for fuel economy from new, but the N20 underneath responds well to a remap.
BMW X3 28i tuning
Most F25 X3 28i buyers chose the four-cylinder for fuel economy, not enthusiasm. Built from 2011 to 2017 with xDrive as standard, it is the family workhorse of the N20 range, school runs, towing and holidays, and that daily-duty role is precisely why a remap makes sense: the engine works hard in a tall, all-wheel-drive body and appreciates every extra newton-metre.
The factory settings deliver 245 bhp and 350 Nm through the ZF 8-speed to all four wheels. Samuel's Stage 1 raises the X3 to 280 bhp and 400 Nm with no parts required, which translates directly into easier motorway joins and more relaxed load-lugging. Stage 2, once downpipe, intake and intercooler are on, lifts the SUV to 320 bhp and 450 Nm.
Hybrid-turbo builds to roughly 400 bhp are possible on the F25 too, calibrated case-by-case around the hardware fitted. As with every SamuelTuned file, distance is no obstacle: describe your build, receive a hand-calibrated map via BM3, MHD or MG Flasher within 24 hours, flash it on your own drive, and hold onto the stock file should you ever want the X3 back to standard.
Configurator
Build your X3 28i tune
Choose your stage — Stage 1, Stage 2 or Stage 3 — add the options that fit your car, and send the full build to Samuel for a custom remote remap. He'll quote, schedule, and personally calibrate within 24 hours of confirmation.
Add a stage or add-on
£0
Engine guide
BMW X3 28i tuning, stages, hardware and what to expect from the F25 N20
The F25 X3 xDrive28i (2011-2017) is the N20 in BMW's mid-size SUV body, same engine and ECU as the 328i and 428i, in a taller xDrive body. From the factory, BMW set the X3 28i at 245 bhp / 350 Nm; the N20 hardware ceiling sits considerably higher. BMW X3 28i tuning with Samuel applies the same N20 Stage 1 / Stage 2 / Stage 3 map family. BMW X3 xDrive28i tuning and BMW X3 28i F25 tuning are the same map.
Stage 1
280 bhp · 400 Nm
No hardware required. The MEVD17 DME is flashed via the OBD port. BMW X3 28i Stage 1 unlocks 280 bhp and 400 Nm from the OEM hardware (up from 245 / 350 stock). The BMW X3 28i chip tuning starting point, particularly noticeable on the SUV given its mass.
Every X3 28i tune Samuel produces is calibrated individually for the specific car, fuel grade and installed hardware, not a base map loaded and left. BMW X3 28i tuning done correctly accounts for the F25 SUV chassis weight, xDrive calibration and UK fuel quality; the map is reviewed against your data logs after the first flash and revised before sign-off.
Compatibility
Platform and hardware compatibility
Bootmod3 (BM3)
Full N20 support across every chassis in the family (228i, 125i, 328i, 428i, 528i, X3 28i, Z4 28i). MEVD17 DME OBD flashing, realtime monitoring via the BM3 app. The most widely used platform for N20 tuning.
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MHD
Full N20 support. Suitable for Stage 1 and Stage 2. Strong data-logging toolset.
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MG Flasher
Full N20 support. Clean interface and reliable flash process on the MEVD17 DME.
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xHP Flashtool
Compatible with the ZF 8HP gearbox fitted to F-series N20 cars (228i, 125i, 328i, 428i, 528i, X3 28i F25). Strongly recommended at Stage 2 where torque jumps significantly for a 2.0-litre four. The Z4 28i E89 uses an older ZF 6HP or 7-speed DCT, xHP coverage differs.
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ECU: MEVD17.2 DME across N20 production. Accessible via OBD port for Stage 1 and Stage 2.
X3 28i specs & stage targets
BMW X3 28i tuning at a glance
- Engine
- N20 · 2.0L turbocharged inline-four
- Body styles
- F25 SUV
- Chassis codes
- F25
- Production
- 2010–2017
- Drivetrain
- xDrive
- Gearbox
- 8-speed ZF automatic
- Stock output
- 245 bhp · 350 Nm
- Tuning ceiling
- ~400 bhp on the right hardware
| Stage | Target |
|---|---|
| Stage 1 | 280 bhp · 400 Nm |
| Stage 2 | 320 bhp · 450 Nm |
| Stage 3, Hybrid Turbo | 400 bhp · 500 Nm (depending on spec) |
FAQ
X3 28i tuning — frequently asked questions
Not in the calibration itself, the N20 and its ECU are the same as in the rear-driven cars, but it changes how the result feels. With drive split across both axles, the X3 puts the extra 50 Nm down cleanly in conditions that would trouble a rear-driven saloon, so the gains are unusually usable in daily driving.
Yes, that is the design intent. Part-throttle manners, cold starts, idle and cruise economy are all preserved; the calibration only changes what happens when you ask for more. Around town the tuned X3 drives like the standard car, and the 280 bhp and 400 Nm reveal themselves in overtakes, slip roads and fully-loaded hills.
That depends on your appetite. The downpipe, intake and intercooler unlock 320 bhp and 450 Nm, a substantial step in a practical family car, and the intercooler in particular helps a hard-worked engine hold consistent power when towing or fully laden. If the X3 is purely a school-run tool, Stage 1 alone is the better-value stopping point.
Service history first. The earliest N20s are the ones flagged in the timing-chain wear debate, so a pre-2015 X3 with unknown history warrants a check before adding torque. Beyond that, make sure the car is mechanically healthy, no stored fault codes, boost leaks or neglected plugs, and it will take Samuel's calibration exactly as intended.
In minutes. The original BMW calibration is preserved when the car is first read, and flashing back through BM3, MHD or MG Flasher restores the X3 to factory software completely. Nothing physical marks the car as having been tuned at Stage 1, since no hardware changes are involved at that level.
Keep exploring
Keep exploring X3 28i tuning
Other N20 models we tune: 125i, 228i, 328i, 428i, 528i, Z4 28i.
Engine guide
N20 tuning
Every N20 BMW we calibrate, with the full Stage 1, 2 and 3 breakdown for the engine.
Learn moreStages
Stage 1 & Stage 2 explained
What separates Stage 1 from Stage 2 on the X3 28i, the real-world gains and the hardware each one needs.
Learn morePricing
How tuning is priced
How the licence, off-the-shelf maps and custom calibration are priced. We quote your exact spec, never a fixed menu.
Learn moreGuide
What is bootmod3?
New to remote flashing? A plain-English explainer on the platform and how a custom map reaches your car.
Learn more