BMW 3 Series G20 front detail on our dyno

G20 / G21 · 2020 on · B57 twin turbo

BMW M340d xDrive Stage 1 Remap

BMW’s fast diesel 3 Series, with xDrive and M Performance suspension. A map doesn’t change its character; it makes every gear feel stronger.

400bhpPower · from 340

800NmTorque · from 700

£449Stage 1 · inc VAT

Book Stage 1 £449How it drives

M340d on the road

How a remapped M340d drives

+100Nm

Overtakes in one breath

800Nm in a 3 Series is the kind of torque you’d expect from something much bigger. Fourth-gear overtakes are over before you’ve settled back into the seat.

+60bhp

All four wheels working

With xDrive putting it down, the extra power is usable in the wet too, pulling cleanly out of junctions and roundabouts without fuss.

590lb-ft

A quieter kind of fast

Unlike a petrol M car, the M340d’s speed comes without revs or noise, and the map keeps it that way, just with more of it.

M340d Stage 1 figures

From 340 to 400bhp

Typical figures for a G20 / G21 M340d on Stage 1.

Power340400bhp+60 bhp · +18%

Torque700800Nm+100 Nm · +14%

404.4bhp on our dyno

The M340d shares its B57 twin turbo with a customer BMW X3 M40d we mapped: 324.9 to 404.4bhp and 686 to 805Nm, measured on our rollers. See that dyno sheet

M340d remap price

Your M340d, priced

Stage 1

£449inc VAT

Around 400bhp and 800Nm for your M340d.

Book Stage 1

Stage 1 + xHP Most popular

£709save £125

The M340d engine and its ZF8, tuned together with xHP.

Book Engine + Gearbox

Prices include VAT · Finance available

The G20 / G21

About the G20 / G21 M340d

The M340d xDrive is the fast diesel 3 Series: the twin-turbo B57, xDrive as standard and an M Performance chassis. It’s already quick, so Stage 1 isn’t about transforming it. It’s about making it feel effortless at any speed, with around 800Nm on tap.

Engine: B57 twin turbo, 2993cc
Chassis: G20 / G21 · 2020 on
After Stage 1: 400bhp · 800Nm · 590 lb-ft
Gearbox: ZF 8-speed automatic
ECU: Bosch MD1CP032
Locked ECU?: Nearly all · £100 same-day unlock · check yours

Questions

M340d remap questions

How much bhp does a BMW M340d xDrive remap add?

A G20 / G21 M340d goes from 340bhp and 700Nm to around 400bhp and 800Nm on Stage 1: 60 more horsepower and 100Nm more torque.

Is the M340d tuned differently from the 330d?

Yes. The M340d has the twin-turbo B57, so it starts at 340bhp and goes to around 400bhp and 800Nm, where a 330d goes to around 330bhp.

Will my M340d still be smooth every day?

Yes. A custom map keeps the factory refinement; the power comes in more strongly, not more abruptly.

Is a remapped M340d quicker than an M340i?

In the gears, where most driving happens, it pulls harder. An M340i makes 374hp and 500Nm; a remapped M340d makes around 400bhp and 800Nm, so it has more power and far more torque.

Your M340d, at 400bhp.

For G20 / G21 M340d cars, 2020 on. Same day, on our dyno in Warrington.

Book Stage 1 £449Call 01925 819002