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BMW Tuning
BMW 8-Series Remap Figures
Before and after power and torque for every BMW 8-Series engine we tune, measured on our in-house 4WD dyno. Every map is written for your exact car and is fully reversible.
G15 - 2018 -> ...
Spread the cost. From
£74.84/mo over 6 months at
0% APR — interest free. Or 3 interest-free payments of
£149.67 with Klarna.
How finance works ›Book engine
and gearbox tuning together and
save £125.
BMW 8-Series remapping questions
What gains can I expect from Stage 1 on a BMW 8-Series?
It depends which engine you have. Across the 2 BMW 8-Series engines we tune, the M850i sees the biggest Stage 1 gain — 530bhp to 680bhp and 750Nm to 850Nm, up 150bhp. Every figure on this page is for that exact engine.
How much does it cost to remap a BMW 8-Series?
Stage 1 custom dyno tuning on a BMW 8-Series starts at £449 inc VAT, and gearbox tuning is £385. Book both together and you save £125. You can spread it over 6 months at 0%, or pay in 3 interest-free instalments with Klarna.
Does my BMW 8-Series need its ECU unlocking?
If it was built from around June 2020 onwards, yes — those ECUs are locked from the factory and have to be unlocked before anything can be written. We do it in-house. Check your registration and we will tell you straight away whether yours is affected.
Check if your ECU is locked ›Will remapping my BMW 8-Series affect my warranty or insurance?
You will need to tell your insurer, as with any modification, and it can affect a remaining manufacturer warranty. Because we save your original software first, the BMW 8-Series can be put back to standard at any point.
How long does it take, and is it reversible?
Allow roughly two hours for Stage 1, or a half-day if the ECU needs unlocking first. Everything is reversible: we store your original software so the BMW 8-Series can go back to stock on request.
Other BMW models
Whichever you pick, the total carries through to checkout — pay in full by card, Apple Pay or Klarna (3 interest-free payments), or secure the slot with a £50 deposit. Figures are typical results for a healthy, standard vehicle on our dyno. Your car’s actual output depends on its condition, fuel quality and any supporting modifications. Prices shown are for Stage 1 custom dyno tuning inc VAT; locked ECUs (most BMW and Audi registered from mid-2020) carry an additional unlocking charge, confirmed when you book.
