DAF LF45 2001> 3.9 ltr BE99C 135bhp remap figures
The DAF LF45 3.9 ltr BE99C 135bhp (2001>) is a diesel 3.9L model making 135bhp and 500Nm as standard. After a Stage 1 ECU remap we expect 170bhp and 615Nm - up to 35bhp and 115Nm more than stock.
Choose your map
Stage 1 remap figures
A Stage 1 remap is a software-only change to the ECU on an otherwise standard car. It needs no extra parts, which makes it the usual starting point.
| Stock | Vanguard expected | Expected gain, up to | |
|---|---|---|---|
| Power | 135 bhp | 170 bhp | +35 bhp |
| Torque | 500 Nm | 615 Nm | +115 Nm |
All maps at a glance
| Map | Power | Torque | Expected gain, up to |
|---|---|---|---|
| Stock | 135 bhp | 500 Nm | |
| Stage 1Maximum software-only performance | 170 bhp | 615 Nm | +35 bhp +115 Nm |
| Stage 1 EcoPerformance with economy in mind | 161 bhp | 606 Nm | +26 bhp +106 Nm |
| Eco mapEconomy first | 158 bhp | 600 Nm | +23 bhp +100 Nm |
Who is the Stage 1 map for?
- Drivers who want stronger pulling power for overtaking, hills and towing, with no parts to fit.
- Daily and motorway drivers who want the engine to feel less strained at cruising speed.
- Anyone who wants the biggest software-only change we list for this engine.
What this means for your LF45
Diesel remaps work mainly on boost pressure, fuel delivery and torque limiters, which is why the Nm gain is usually the figure you feel in everyday driving, particularly when overtaking or towing.
Engine management is by a Bosch ECSDC3/EDC7 unit. Older engine management is simpler to work with, but age matters: worn sensors, leaks and tired components can hold back what a remap delivers, which is why we run a diagnostic check first.
We remap at our Belgrave Gate workshop in Leicester, or at your home or work within 30 miles, and every job starts with a diagnostic check.
Please note: these are expected figures, not guarantees. Real results vary with the condition of the vehicle, the ECU software version, fuel quality and the hardware fitted. Some options - including Stage 2 and anything that needs extra hardware - are for off-road or competition use only. We check every vehicle first and confirm what is achievable before any work starts.
Figures reviewed 22 October 2026.
Stage 1 questions
How much power does the Stage 1 map give the DAF LF45 3.9 ltr BE99C 135bhp?
We expect 170bhp and 615Nm against 135bhp and 500Nm as standard: up to +35bhp and +115Nm. These are expected figures, and we confirm what is achievable on your own car after a diagnostic check.
Does a Stage 1 remap need any extra parts on the DAF LF45 3.9 ltr BE99C 135bhp?
No. Stage 1 is a software-only change to the ECU on an otherwise standard car.
Is there a gentler map than Stage 1 for this engine?
Yes, two. Stage 1 Eco is performance with economy in mind: 161bhp and 606Nm expected. The Eco map is economy first: 158bhp and 600Nm. Both still sit above the standard 135bhp and 500Nm.
Do I need to tell my insurer about a remap?
Yes. A remap is a modification, so you should declare it to your insurer.