BMW · Power Calculator

BMW 1 serie E87 - 2004 - 2007 135i 306hp Stage 1 Chip Tuning · ECU Remap

Name: BMW 1 serie E87 - 2004 - 2007 135i 306hp Stage 1 Chip Tuning
Brand: BMW

How much bhp does BMW 1 serie E87 135i 306hp chip tuning add?

Power goes from 306 bhp to 370 bhp — a gain of +64 bhp (21%). Torque rises from 400 Nm to 500 Nm.

Power306 → 370 bhp+64 bhp (+21%)

Torque400 → 500 Nm+100 Nm (+25%)

Figures are typical ranges; exact results depend on the vehicle's hardware and dyno measurement.

Stage 1 Remap Stage 2 Remap Pop & Bang Speed Limiter (Vmax) Removal DTC / Fault Code Removal

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BMW 1 serie E87 - 2004 - 2007 135i 306hp

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Reversible: Yes, the original software is kept

BMW 1 serie E87 - 2004 - 2007 135i 306hp — Stage 1 Remap

Stage 1 re-calibrates the ECU software — boost, fuelling and ignition maps — within the factory hardware's safe tolerances. No hardware changes are required.

Stage 1 Remap

Software that optimises the engine's power and torque maps within safe limits.

Stage 2 Remap

Advanced software matched to hardware upgrades such as a sport exhaust or induction kit.

Pop & Bang

Software that creates exhaust crackle on lift-off.

Speed Limiter (Vmax) Removal

Removing the factory top-speed limiter from the software.

DTC / Fault Code Removal

Switching off selected diagnostic trouble codes (DTC) in the ECU software.

BMW 1 serie — Power Calculator

Engine	Power
116i 115hp	115 → 128 bhp	+13 bhp
118D 122hp	122 → 155 bhp	+33 bhp
118i 129hp	129 → 145 bhp	+16 bhp
120D 163hp	163 → 200 bhp	+37 bhp
120i 150hp	150 → 165 bhp	+15 bhp
130i 265hp	265 → 285 bhp	+20 bhp

Frequently asked questions

How much bhp does BMW 1 serie E87 135i 306hp chip tuning add?

Power goes from 306 bhp to 370 bhp — a gain of +64 bhp (21%). Torque rises from 400 Nm to 500 Nm.

Will chip tuning damage the engine?

No. Values stay inside the safety margin the manufacturer leaves; engine, gearbox and turbo limits are not exceeded. Every file is verified with a road test and data logging. If the car needs maintenance first (worn injectors, blocked filter, weak clutch) we tell you before starting.

Will my fuel consumption go up?

With the same driving style it usually drops, because you hold the same speed at lower revs and less throttle. If you use the extra power, consumption naturally rises. It is down to your right foot.

How long does it take? Do I leave the car?

Most cars take 1–2 hours and you get the car back the same day; no need to leave it. Some models need the ECU removed, which takes longer — we tell you when booking.

Can I go back to stock later?

Yes. The original file is read and archived before any work. We restore the factory software free of charge whenever you ask.

Does it void my warranty?

Changing engine software can affect the manufacturer warranty. If a dealer finds a fault to be software related, they may refuse that claim. We want you to decide knowing this. Your original file stays with us and can be restored before a dealer visit.

Will it pass the roadworthiness test?

Stage 1 power software does not touch emission hardware. Work on emission systems is offered only for uses permitted by law; road use and inspection compliance remain the owner's responsibility.

How much does BMW 1 serie E87 135i 306hp chip tuning cost?

Price depends on the vehicle, the ECU and the solution chosen. Send us your vehicle details on WhatsApp and we will quote straight away. Inspection and measurement are free.

How is the work done?

We scan for faults and read the original software first. The file is adapted to your car's hardware, written, and verified on a road test. The original is archived.

⚠ Software work on emission systems is offered only for uses permitted by applicable law (motorsport, off-road use, export, fault diagnosis, etc.). Road use and inspection compliance of the vehicle remain the owner's responsibility.