BMW Series 4 420d Stage 1: 190→223hp | DMS Tuned

BMW Series 4 420d Stage 1: 190→223hp

BMW Series 4 420d Stage 1: 190hp → 223hp, 400→486Nm. Custom DMS calibration written for your car — not an off-the-shelf file. From €450. Athens + remote.…

BMW Series 4 Stage 1: 190 hp → 223 hp

Factory output for the BMW Series 4 420d is 190 hp and 400 Nm. A Stage 1 remap targets 223 hp and 486 Nm — 33 hp (+17%) and 86 Nm (+22%).

Those are the figures we work to on this engine. They are a starting point, not a promise: the number we hand back is the one your car makes on our dyno, measured before and after on the same day, in the same conditions.

Where the 86 Nm shows up

On a diesel the useful change is torque, not peak power. Going from 400 Nm to 486 Nm fills in the mid-range, which is where a BMW Series 4 actually spends its time — pulling from 1,800 to 3,000 rpm in a high gear, overtaking without dropping two gears, towing or carrying weight without the engine falling on its face.

Peak power moves too, 190 hp to 223 hp, but you will feel the 86 Nm far more often than the 33 hp.

What Stage 1 involves on a BMW Series 4

We read the ECU, log the car as it stands, and put it on the dyno to confirm the 190 hp baseline — a tired or faulty engine gets diagnosed before it gets mapped, not after.

The calibration is written for your car, not pulled from a file library. We adjust fuelling, ignition timing, injection timing and boost, then re-run the dyno to verify the 223 hp and 486 Nm figure and check knock, lambda and temperatures under load.

Turnaround is same-day for most cars. Stock file is archived, so the car can go back to standard whenever you want.

Which BMW Series 4 this covers

These figures are for the 420d as fitted 2020–2024. Engine code and ECU type decide what is possible, so send us the registration or VIN and we will confirm the exact variant before you book anything.

BMW Series 4 remap price and booking

Stage 1 for the BMW Series 4 420d starts at €450, including the dyno runs before and after and the stock-file archive.

We work from Leoforos Karamanli 127, Artemida 19016, east of Athens, and tune remotely across Europe where the ECU allows it. WhatsApp +30 697 728 8810 with your registration for a straight answer on your car.

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