Typical before and after power and torque for every Audi S4 engine we tune. Your own car is custom mapped on our in-house 4WD dyno, and every map is fully reversible.
Power & torqueindicative curve, scaled to the published figures
400 bhp from 333+67 bhp520 Nm from 440+80 Nm
430 bhp from 333+97 bhp550 Nm from 440+110 Nm
Tuned bhpTuned NmStock bhpStock Nm
Shape is indicative. Your real before & after curves are measured on our 4WD dyno on the day and you take the printout home.
Power & torqueindicative curve, scaled to the published figures
400 bhp from 333+67 bhp520 Nm from 440+80 Nm
430 bhp from 333+97 bhp550 Nm from 440+110 Nm
Tuned bhpTuned NmStock bhpStock Nm
Shape is indicative. Your real before & after curves are measured on our 4WD dyno on the day and you take the printout home.
B9 (2016–2024)
Engine
Standard
Stage 1custom dyno tuning
Stage 2custom dyno tuning
Price
S4 - 3.0 TFSIPetrol
354 bhp 500 Nm
420 bhp+66 600 Nm+100
440 bhp+86 620 Nm+120
£549Built after June 2020?£998 with the £449 in-house unlock (same day), or £948 with the £399 send-away unlock (3–4 working days)Stage 2 £749+ gearbox £325 S1 + gearbox £749 › S2 + gearbox £949 ›
£549Built after June 2020?£998 with the £449 in-house unlock (same day), or £948 with the £399 send-away unlock (3–4 working days)+ gearbox £325 S1 + gearbox £749 ›
Locked ECU? We unlock it. Most Audis built from June 2020 have a locked ECU. Two routes, your choice when you book: £449 in-house on our bench, same day with no extra time, or £399 sent away, 3–4 working days with the car staying with us. On its own, if we’re not tuning the car, it’s £549 in-house or £499 sent away. More on unlocking →
Stage 2 Petrol supporting mods: decat or sports cat + uprated intercooler.
Stage 2 Petrol supporting mods: decat or sports cat + uprated intercooler.
Every price on this page is a full custom dyno tune
Not a generic file bought in and flashed over the port. Your Audi S4 is strapped to our in-house 4WD dyno and the map is written for your car, on the day, from its own data.
Health check firstWe look the car over and read the fault memory before we touch anything. If something is wrong, you get told. We don't map over a problem.
Live data loggingBoost, timing, fuelling and temperatures all watched in real time under load: knock on the petrols, rail pressure and exhaust temps on the diesels.
Custom calibration on the dynoThe map is built and adjusted run by run against what your engine is actually doing, not what a file supplier assumed.
Before and after printoutYou leave with the graph: your standard figures and your tuned figures, measured on the same rollers, the same day.
Spread the cost. From £91.50/mo over 6 months at 0% APR with Bumper, interest free. Or choose Pay in full when you book and pay with Klarna. How finance works › Book engine and gearbox tuning together and save £125.
Audi S4 remapping questions
What does Stage 1 tuning do for an Audi S4?
It depends which engine you have. Across the 4 Audi S4 engines we tune, the S4 3.0 TFSI sees the biggest Stage 1 gain: 333bhp to 400bhp and 440Nm to 520Nm, up 67bhp. Every figure on this page is for that exact engine.
How much does it cost to remap an Audi S4?
Stage 1 custom dyno tuning on an Audi S4 starts at £549 inc VAT, and gearbox tuning is £325. Book both together and you save £125. You can spread it over 6 months at 0% with Bumper, or choose Pay in full when you book and pay with Klarna.
Does my Audi S4 need its ECU unlocking?
Quite possibly. Most Audis built from around June 2020 have a factory-locked ECU, and the 4.0 V8 TFSI cars (SQ7, SQ8, RS6, RS7, RSQ8, S8 and the V8 A8, Q7 and Q8) are locked well before that date too. We unlock them here on our own bench the same day, or send the ECU away for a lower price; the 4.0 V8 ECUs can only go the send-away route. Send us your registration and we will confirm exactly where yours stands before you book. Send us your reg and we will confirm ›
What does Stage 2 need on an Audi S4?
It depends on fuel. Diesels need a DPF delete (off-road use only) and an uprated intercooler; petrols need a decat or sports cat downpipe plus an uprated intercooler. Stage 2 cannot be mapped safely on a standard car, so if yours has no supporting hardware we will fit Stage 1 instead.
Will remapping my Audi S4 affect my warranty or insurance?
You will need to tell your insurer, as with any modification, and it can affect a remaining manufacturer warranty. Every map is reversible, so the Audi S4 can be put back to its factory software at any point.
How long does it take, and is it reversible?
Allow roughly two hours for Stage 1, including any ECU unlock on our own bench. Everything is reversible: the Audi S4 can go back to its factory software on request.
Ways to paywhen you pay in full0% finance over 6 monthsCard & Apple Pay£50 deposit secures your slotHow finance works ›
Whichever you pick, the total carries through to checkout, so pay in full by card, Apple Pay or Klarna, or secure the slot with a £50 deposit. Figures are typical for a healthy, standard vehicle; your before and after dyno printout shows exactly what your car makes. 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.
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In-house 4WD dyno · before & after printout
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BMW ECU unlocking · in-house, same day
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0% finance with Bumper · spread it over 6 months
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10,000+ vehicles tuned · 14+ years
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BMW & VAG specialists · Warrington
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