Audi A4 TDI 1.9 90(b5)
ECU Remapping
Audi A4 TDI 1.9 90(b5). 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 A4 TDI 1.9 90(b5): standard vs remapped
Diesel engine. Indicative stage 1 figures, fully dyno tested.
Power
+31 bhp · +34%- Standard90 bhp
- Remapped121 bhp
Torque
+78 Nm · +39%- Standard202 Nm
- Remapped280 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 Audi A4 TDI 1.9 90(b5) produces 90 bhp and 202 Nm of torque as standard. After a stage 1 ECU remap across the UK, our figures show 121 bhp and 280 Nm: a gain of 31 bhp (34%) and 78 Nm (39%).
Treat the numbers as a guide: they are stage 1 estimates for a diesel Audi A4 in sound condition, and individual cars differ.
Audi A4 TDI 1.9 90(b5): remap at a glance
- Fuel: Diesel
- Standard power: 90 bhp, remapped: 121 bhp (+31 bhp, +34%)
- Standard torque: 202 Nm, remapped: 280 Nm (+78 Nm, +39%)
- Service: stage 1 ECU remap, fully dyno tested
What a remap does for a diesel Audi A4
The gains from remapping a diesel come from the engine management software rather than new parts: injection, boost and torque limits are re-mapped, which is why torque improves most and why the car often feels easier to drive at lower revs.
For reference, TDI is the Volkswagen Group name for its turbocharged direct-injection diesel engines.
Audi A4 TDI 1.9 90(b5) against other A4 engines
Of the 24 diesel A4 engines in our data, this one comes 21st for power gain, which is 7 bhp below the A4 diesel average of 38 bhp.
Across our whole catalogue the average diesel remap adds 34 bhp and 73 Nm, so this engine's 31 bhp and 78 Nm sits below that benchmark.
Audi A4 performance tuning
Our network covers the whole of the UK through local Remap Experts sites. Find your area to get a quote from a specialist near you.
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.

Ready for ECU remapping on your Audi A4?
Send your registration and we will confirm the exact remap, the price and the next available slot.
Included
What we can do for your Audi A4
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 A4 engines
- Audi A4 1.8 TFSI 120(b8) upto sept 2008petrol
- Audi A4 1.8 TFSI 160(b8)petrol
- Audi A4 1.8T 150(b5)petrol
- Audi A4 1.8T 150(b6)petrol
- Audi A4 1.8T 163(b6)petrol
- Audi A4 1.8T 163(b7)petrol
- Audi A4 1.8T 180 Us(b6)petrol
- Audi A4 1.8T 180(b5)petrol
- Audi A4 1.8T 190(b6)petrol
- Audi A4 2.0 130(b5)petrol
- Audi A4 2.0 130(b7)petrol
- Audi A4 2.0 FSI 150(b6)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