BMW 5 serie E39 - 1995 - 2003 525 TDS 143hp Stage 1 Chip Tuning · ECU Remap

Power goes from 143 bhp to 172 bhp — a gain of +29 bhp (20%). Torque rises from 280 Nm to 350 Nm.

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.

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.

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.

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

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.

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.

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.

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.