BHP+35 hp (23%)
Standard
155 hp
Tuned
190 hp
Torque+80 Nm (26%)
Standard
310 Nm
Tuned
390 Nm
Suitability
Good (7.5/10)Gains Profile
BalancedHeadroom
HighAudi A4 2.5 TDI 155hp ECU Remapping
Considering an ECU remap for your Audi A4 2.5 TDI 155hp? A Stage 1 remap can take this B6 - 2001 - 2004 diesel engine from 155 BHP to 190 BHP and from 310 Nm to 390 Nm of torque (turbocharged). This engine scores 7.5/10 for remap suitability. Get a free personalised quote from a trusted remap professional and find out exactly what your Audi A4 can achieve.
How this engine compares
- 66thof 101 Audi A4 engines by power gain
- 54%of the 9,842 engines we hold gain data for see a smaller power increase
- 64%of engines with torque data see a smaller torque increase
Comparisons are calculated from our own recorded Stage 1 figures.
Assessment
The Audi A4 2.5 TDI 155hp is a 2.5L turbocharged diesel engine producing 155 BHP and 310 Nm from the factory. With a typical Stage 1 remap, output increases to approximately 190 BHP and 390 Nm — a gain of around 35 BHP (23%) and 80 Nm (26%).
This engine scores highly for remap suitability, with a balanced spread of gains across both power and torque — providing a noticeable improvement across the rev range. The tuning headroom is classified as high, based on the percentage gain available from the factory output.
From a technical perspective, the ECU is typically a Bosch EDC15 (likely), and the transmission is manual and dsg/s tronic automatics are common depending on model/engine..
Considerations: Large torque increase: drivetrain condition (clutch/gearbox) becomes more important at this level.. Older diesel: injector, turbo and intake condition can affect results; ensure maintenance is up to date.
Fuel economy note: possible improvement with conservative driving.
All figures shown are typical estimates based on aggregated Stage 1 data for this engine variant. Actual results depend on vehicle condition, mileage, and the chosen tuning method. We recommend discussing your specific vehicle with a qualified remap professional.
Considerations
!Large torque increase: drivetrain condition (clutch/gearbox) becomes more important at this level.
!