Is a BMW Stage 1 remap reversible?

Completely. We keep your original file so the car can be returned to standard at any time, before a dealer visit or when you sell it.

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BMW Stage 1 Remap

BMW Stage 1 Remap,
Custom Mapped On Our Dyno

Q: How much power does a BMW Stage 1 remap add?

It depends on the engine. A 20d typically goes to around 230bhp, a 30d to about 330bhp, a 35d up to roughly 390bhp and a B58 petrol to around 420bhp. As a rule expect 20-35% more power and up to 40% more torque, with the biggest real-world gain being mid-range torque rather than peak figures.

Q: Is a Stage 1 remap safe for my BMW?

Yes, when written properly. Stage 1 works within the safe limits of the standard hardware. Every map is developed live on our 4WD dyno while boost, fuelling and temperatures are monitored, which a generic off-the-shelf file cannot do.

Q: Do I need any hardware for Stage 1?

No. Stage 1 is software only on an otherwise standard car. Stage 2 is the next step up and does require hardware such as a downpipe or intercooler.

Q: How long does a BMW Stage 1 remap take?

Around two to three hours on the dyno, and it is a same-day job. Adding xHP gearbox software or an in-house ECU unlock is done in the same visit.

A BMW Stage 1 remap on standard hardware, written for your exact engine on our in-house 4WD dyno, not a generic file off a shelf. Typical gains are 20–35% more power and up to 40% more torque, fully reversible, with before and after printouts in your hand before you leave.

See the exact figures for your BMW →

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What Stage 1 Actually Is

Stage 1 Means No Hardware Changes

Stage 1 is a remap of your BMW’s standard engine, nothing bolted on, nothing removed. We read the ECU, write a calibration for your exact engine, fuel, gearbox and condition, and prove it on the rolling road. Boost, fuelling, timing and torque limiters are all reworked together and kept inside the safe operating limits of the hardware that is already on the car.

That is the difference between a custom Stage 1 and a generic one. A file bought off a shelf has never seen your car. Ours is written live with the BMW strapped to a V-Tech VT-4 4WD linked dyno, so xDrive cars load all four wheels and the figures you are quoted are the figures you actually get. Stage 2 is the step beyond, and needs hardware.

Stage 1 By Engine

What Your BMW Makes On Stage 1

Real Stage 1 figures from our own dyno. Tap your engine for the full before-and-after, pricing and gearbox options.

401bhp+

BMW X3 M40d

G01 B57

up to 400bhp

BMW 640d

G32 Gran Turismo

up to 400bhp

BMW 45e

545e · 745e · X5 45e hybrid

up to 500bhp

Engine not listed? We tune the whole BMW range, check your exact car for its figures and price.

What You Get

Every Stage 1 Remap Includes

The same process on every car, whether it is a 120d or an M140i.

A Custom Dyno Map

Written live for your car on our 4WD rolling road, never a generic file.

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Before & After Printouts

Measured power and torque, handed to you on the day. No guesswork.

Our process

Optional xHP Gearbox

Pair Stage 1 with ZF8 software for faster shifts. Save £125 booked together.

Learn more

In-House 4WD Dyno

Proven On Our 4WD-Linked Dyno

Every Stage 1 map is developed and validated on our own V-Tech VT-4 4WD rolling road, no guesswork, just real, measured figures.

BMW X3 having a Stage 1 remap developed on the in-house 4WD linked dyno at DC Remapping UK, Warrington

Stage 1 power runs on the 4WD rolling road dyno at DC Remapping UK

Locked BMWs

Post-2020 G-Series? We Unlock In-House

BMWs built from around June 2020 have encrypted MG1 and MD1 ECUs that most remappers simply cannot write to. We bench-unlock them in-house on our own bench, same visit, so a locked G20, G30 or G05 gets its Stage 1 remap the same day rather than having its ECU posted off to a third party. How ECU unlocking works →

Stage 1 FAQs

BMW Stage 1 Remap, FAQs

How much power does a BMW Stage 1 remap add?

It depends entirely on the engine. A 20d typically goes to around 230bhp, a 30d to about 330bhp, a 35d up to roughly 390bhp and a B58 petrol to around 420bhp. As a rule of thumb expect 20–35% more power and up to 40% more torque, with the biggest real-world gain being mid-range torque rather than peak figures. Check your exact car for its own numbers.

Is a Stage 1 remap safe for my BMW?

Yes, when it is written properly. Stage 1 works within the safe limits of your standard hardware, we never push beyond what the turbo, clutch and internals can reliably take. Every map is developed live on our dyno while we watch boost, fuelling and temperatures, which is exactly what a generic off-the-shelf file cannot do.

Is it reversible?

Completely. We keep your original file, so the car can be returned to standard whenever you want, before a dealer visit or when you sell it.

Do I need any hardware for Stage 1?

No. Stage 1 is software only on an otherwise standard car, which is the whole point of it. Stage 2 is the next step up and does need hardware such as a downpipe or intercooler.

How long does it take?

Allow around two to three hours for a Stage 1 on the dyno, and it is a same-day job. Adding xHP gearbox software or an in-house ECU unlock is done in the same visit.

Where are you based?

Unit 20 Trinity Court, Birchwood, Warrington WA3 6QT, 2 minutes from J11 of the M62 and 5 from J21A of the M6. Most of Manchester, Chester and Cheshire is a 25–35 minute drive, and customers travel to us from across the UK.

Before & After Figures

See exactly what your car will make

Real before and after power and torque for every BMW engine we tune, measured on our in-house 4WD dyno, with prices, gearbox options and the delivery curve for each one.

BMW 1-Series BMW 3-Series BMW 4-Series BMW 5-Series BMW X3 BMW X5 BMW M3 BMW M4

Check any other car ›

BMW Stage 1 Remap,Custom Mapped On Our Dyno

Stage 1 Means No Hardware Changes

What Your BMW Makes On Stage 1

BMW 20d

BMW 30d

BMW 35d

BMW 40d

BMW M50d

BMW B58

BMW M135i