BMW X5 4.8i 355(e70)
Engine Tuning Cardiff
BMW X5 4.8i 355(e70) in Cardiff. 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 X5 4.8i 355(e70): standard vs remapped
Petrol engine. Indicative stage 1 figures, fully dyno tested.
Power
+40 bhp · +11%- Standard355 bhp
- Remapped395 bhp
Torque
+55 Nm · +12%- Standard475 Nm
- Remapped530 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
The BMW X5 4.8i 355(e70) produces 355 bhp and 475 Nm of torque as standard. After a stage 1 ECU remap in Cardiff, our figures show 395 bhp and 530 Nm: a gain of 40 bhp (11%) and 55 Nm (12%).
Treat the numbers as a guide: they are stage 1 estimates for a petrol BMW X5 in sound condition, and individual cars differ.
BMW X5 4.8i 355(e70) power and torque after remapping
- Fuel: Petrol
- Standard power: 355 bhp, remapped: 395 bhp (+40 bhp, +11%)
- Standard torque: 475 Nm, remapped: 530 Nm (+55 Nm, +12%)
- Service: stage 1 ECU remap, fully dyno tested
Petrol BMW X5: what changes with a remap
With a petrol engine the remap works through the ECU's ignition, fuelling and turbo boost tables. Re-calibrating them within safe limits releases power that is already there, rather than adding anything to the engine.
BMW X5 4.8i 355(e70) against other X5 engines
Among the 7 petrol X5 engines we have figures for, the 4.8i 355(e70) ranks 2nd for power gain, 14 bhp above the X5 petrol average of 26 bhp.
Across our whole catalogue the average petrol remap adds 27 bhp and 51 Nm, so this engine's 40 bhp and 55 Nm sits at or above that benchmark.
BMW X5 ECU remapping in Cardiff
Drivers in Cardiff book through the Cardiff Remap Experts site, one of our local sites across the UK. We regularly work with drivers in Pentyrch, Rumney, Riverside, Rhiwbina and Llandaff and nearby areas of Wales.
Every remap is fully dyno tested and comes with a 30 day money back guarantee and a lifetime software warranty. Call 0800 779 7864 for a quote.
If you are closer to Gwent, Bristol and Midwales, those neighbouring Remap Experts sites can help too.

Ready for engine tuning on your BMW X5 in Cardiff?
Send your registration and we will confirm the exact remap, the price and the next available slot.
Included
What we can do for your BMW X5
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.
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