Audi A6 4.2 300(c5)
ECU Remapping
Audi A6 4.2 300(c5). Standard and remapped figures for this exact engine.

- Fully dyno tested remaps
- 30 day money back guarantee
- Lifetime software warranty
- UK-wide local network
Remap stats
Audi A6 4.2 300(c5): standard vs remapped
Petrol engine. Indicative stage 1 figures, fully dyno tested.
Power
+24 bhp · +8%- Standard300 bhp
- Remapped324 bhp
Torque
+43 Nm · +11%- Standard400 Nm
- Remapped443 Nm
Tuning figures are indicative estimates, not guaranteed results. Actual results depend on the condition of the vehicle.
Prices from £130
Fully dyno tested | 30 day money back guarantee | Lifetime software warranty
ECU remapping for the Audi A6 4.2 300(c5) takes it from 300 to 324 bhp and from 400 to 443 Nm in our stage 1 figures: +24 bhp (8%) and +43 Nm (11%).
The figures above are estimates for a standard, well-maintained Audi A6 petrol; they are not a guarantee of any particular result.
Audi A6 4.2 300(c5) power and torque after remapping
- Fuel: Petrol
- Standard power: 300 bhp, remapped: 324 bhp (+24 bhp, +8%)
- Standard torque: 400 Nm, remapped: 443 Nm (+43 Nm, +11%)
- Service: stage 1 ECU remap, fully dyno tested
What a remap does for a petrol Audi A6
On a petrol car the ECU controls fuelling, spark timing and any turbo boost. A remap re-calibrates those maps within safe limits, so the car responds more eagerly and pulls harder through the rev range.
How the Audi A6 4.2 300(c5) compares
Of the 22 petrol A6 engines in our data, this one comes 16th for power gain, which is 11 bhp below the A6 petrol average of 35 bhp.
Across our whole catalogue the average petrol remap adds 27 bhp and 51 Nm, so this engine's 24 bhp and 43 Nm sits below that benchmark.
Remapping your Audi A6 across the UK
Remap Experts is a UK network of local remapping sites. Use Find a Local Tuner to reach your nearest site and get an exact quote.
Each remap is dyno tested before it is signed off, and is protected by a 30 day money back guarantee and a lifetime software warranty. Ask for a quote online or by phone.

Get a quote for your Audi A6 4.2 300(c5)
Send your details and a specialist will confirm what is possible for your engine.
Included
What we can do for your Audi A6
Stage 1 ECU remap
Add power and torque and improve driveability. Software only, tailored to your engine.
ECU repair and testing
Is your engine control unit playing up? We can arrange testing and repair, and source replacement ECUs.
DPF and EGR fault repair
Persistent DPF or EGR errors diagnosed and resolved in accordance with all current road-legal standards.
Engine carbon cleaning
Fault finding and carbon cleaning for the inside of your engine, typically completed in a couple of hours.
Same model
Other A6 engines
- Audi A6 1.8t 150 Cv(c5)petrol
- Audi A6 1.8t 180(c4/c5)petrol
- Audi A6 2.0 TFSI 170(c6)petrol
- Audi A6 2.4 165(c5)petrol
- Audi A6 2.4 170(c5)petrol
- Audi A6 2.7t 230(c5)petrol
- Audi A6 2.7t 250(c5)petrol
- Audi A6 3.0 V6 220(c5)petrol
- Audi A6 3.2 FSI 255(c6)petrol
- Audi A6 Allroad 2.5 V6 TDI 163 QuaTTro(c5)diesel
- Audi A6 Allroad 2.5 V6 TDI 180 QuaTTro(c5)diesel
- Audi A6 Allroad 2.7t 250 QuaTTro(c5)petrol
From quote to remapped in four steps
No jargon and no pressure. Here is exactly what happens.
- 01
Find your vehicle
Choose your make, model and engine to see the standard and remapped power and torque for your car.
- 02
Request a quote
Send your details and we contact you by SMS or call back with a quote. No obligation.
- 03
Book with your local site
Your local Remap Experts site arranges the remap and answers any questions about your car.
- 04
Remapped and dyno tested
Your remap is fully dyno tested, with a 30 day money back guarantee and a lifetime software warranty.
Everything you need to know
Plain-English guides to how remapping works, what it does and what to check first.
- 6 min read
What is ECU remapping?
The engine control unit, what a remap changes, and who it suits.
Read guide - 5 min read
The benefits of ECU remapping
More torque, better driveability and the potential for better economy.
Read guide - 6 min read
How ECU remapping works, step by step
From reading the original software to the dyno test.
Read guide