BMW Z4 Roadster M 343
ECU Remapping in Belfast
BMW Z4 Roadster M 343 in Belfast. 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
BMW Z4 Roadster M 343: standard vs remapped
Petrol engine. Indicative stage 1 figures, fully dyno tested.
Power
+25 bhp · +7%- Standard343 bhp
- Remapped368 bhp
Torque
+45 Nm · +12%- Standard365 Nm
- Remapped410 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
Out of the box the BMW Z4 Roadster M 343 gives 343 bhp and 365 Nm. Remapped in Belfast, we record 368 bhp and 410 Nm, so 25 bhp and 45 Nm more, or 7% and 12% respectively.
These are indicative figures for a petrol BMW Roadster in good health. Your own results depend on the condition of the car.
BMW Z4 Roadster M 343 power and torque after remapping
- Fuel: Petrol
- Standard power: 343 bhp, remapped: 368 bhp (+25 bhp, +7%)
- Standard torque: 365 Nm, remapped: 410 Nm (+45 Nm, +12%)
- Service: stage 1 ECU remap, fully dyno tested
What a remap does for a petrol BMW Roadster
A petrol remap re-works the engine management calibration: air-fuel ratio, ignition advance and boost where fitted. The result is more power and a more immediate throttle, delivered by software rather than hardware changes.
How the BMW Z4 Roadster M 343 compares
Of the 17 petrol Roadster engines in our data, this one comes 3rd for power gain, which is 4 bhp above the Roadster petrol average of 21 bhp.
Across our whole catalogue the average petrol remap adds 27 bhp and 51 Nm, so this engine's 25 bhp and 45 Nm sits below that benchmark.
Remapping your BMW Roadster in Belfast
Remap Experts Belfast is part of the UK-wide Remap Experts network. We regularly work with drivers in Holywood, Newtownabbey, Millisle, Lisburn and Dunmurry and nearby areas of Northern Ireland.
All our remaps are fully dyno tested, backed by a 30 day money back guarantee and covered by a lifetime software warranty. Request a quote online or call 0800 779 7864.
If you are closer to Glasgow, Scotland and Carlisle, those neighbouring Remap Experts sites can help too.

Want these figures on your BMW Z4 Roadster M 343?
Tell us about your car and we will come back with a quote by SMS or phone.
Included
What we can do for your BMW Roadster
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 Roadster engines
- BMW Coupe Z3 2.8 193petrol
- BMW Coupe Z3 3.0 231petrol
- BMW Z1 Roadster 2.5 170petrol
- BMW Z3 Roadster 1.8 115petrol
- BMW Z3 Roadster 1.9 118petrol
- BMW Z3 Roadster 2.0 150petrol
- BMW Z3 Roadster 2.8 193petrol
- BMW Z3 Roadster 3.0 231petrol
- BMW Z3 Roadster 3.2 M3 321petrol
- BMW Z4 Roadster 2.0i 150petrol
- BMW Z4 Roadster 2.2i 170petrol
- BMW Z4 Roadster 2.5i 177petrol
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