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Customer Builds

BMW X1 xDrive25d: Stage 1 Custom Dyno Tuning, 276bhp & 522Nm

8 October 2026 · DC Remapping UK

This 2017 BMW X1 xDrive25d (F48) came in for our Stage 1 custom dyno tune. The 25d uses the twin-turbo version of the B47 2.0 diesel, rated at 231hp from the factory.

BMW X1 xDrive25d rear three-quarter on the dyno
The X1 xDrive25d on our 4WD linked dyno.

The numbers

It made 222bhp and 441Nm on the baseline run and left making 276bhp and 522Nm, more torque than an X1 M35i:

MeasurementStockDC Stage 1 Custom
Engine power222.7 hp @ 4,675rpm276.7 hp @ 4,828rpm
Engine torque441 Nm @ 2,077rpm522 Nm @ 3,233rpm
Wheel power176.6 hp237.8 hp
BMW X1 xDrive25d dyno graph, stock vs DC Stage 1 Custom
The dyno printout, stock in red, tuned in blue.

The mid-range dip, gone

On the stock run the torque sagged to around 375Nm at 3,500rpm. Tuned, this X1 holds over 500Nm from 2,250 to 3,900rpm, with up to 145Nm more right where the stock curve dipped, and keeps pulling past 260bhp from 3,600 to 5,000rpm.

BMW X1 xDrive25d rear view strapped to the rollers
Strapped down for back-to-back runs.

How it was done

Diagnostics and a health check first, then stock runs on our 4WD linked dyno with live data logging. The calibration was built from there with repeated runs, and the final pulls verified the result. No generic files, original software backed up and fully reversible.

BMW X1 xDrive25d front quarter with the bonnet up
Health checked and logged before any tuning.

Got an X1? See our BMW X1 tuning figures, check your car’s gains and price, or read more about the B47 engine.

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