BMW X5 4.8i 355(e70)
Engine Tuning in Chester
BMW X5 4.8i 355(e70) in Chester. 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
Owners of the BMW X5 4.8i 355(e70) in Chester can expect a stage 1 remap to take it from 355 to 395 bhp and from 475 to 530 Nm, an extra 40 bhp (11%) and 55 Nm (12%).
The figures above are estimates for a standard, well-maintained BMW X5 petrol; they are not a guarantee of any particular result.
BMW X5 4.8i 355(e70): remap at a glance
- 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
Factory petrol calibrations leave margin for poor fuel and hot climates. A remap tunes the ignition, fuelling and boost maps to make better use of that margin, which shows up as livelier throttle response and stronger acceleration.
How the BMW X5 4.8i 355(e70) compares
Ranked by power gain against the other petrol X5 engines (7 in total), the 4.8i 355(e70) is 2nd, 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 engine remapping in Chester
Remap Experts Chester is part of the UK-wide Remap Experts network. We regularly work with drivers in Nantwich, Sandbach, Runcorn, Northwich and Knutsford and nearby areas of the North West.
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.
If you are closer to Cheshire, Merseyside and Liverpool, those neighbouring Remap Experts sites can help too.

Want these figures on your BMW X5 4.8i 355(e70)?
Send your details and a specialist will confirm what is possible for your engine.
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