G-Chassis · G31

G31 Tuning

BMW's 530i Touring, 540i Touring, 2017–2023. Powered by the B48/B58 engine family.

Stage pricing for the G31

Stage 1
Tune
$495

Where every build starts. Calibration only.

Build this stage Stage 1 methodology
Stage 2
Tune + Supporting Hardware
$2,185

Cooling, downpipe, fueling — the ceiling worth chasing on factory turbos.

Build this stage Stage 2 methodology
Stage 3
Tune + Full Hardware Path
$4,255

Bigger fueling, often a hybrid or Phantom turbo. Per-car.

Build this stage Stage 3 methodology

The G31 is the G30 5 Series Touring — the current 5-series wagon, sold in Europe but not the US. It's the G30 sedan with an estate body: the 540i runs the B58 six (around 335 hp), the 530i the B48 four (around 250 hp), tuning as they do in the sedan (full story on the G30 page; B58 on the G20).

Forbidden fruit for US buyers, but mechanically a G30 — the same buildable platform, the same caveats, with wagon space added.

So the G31 is the modern sport wagon: G30 capability and the practicality the US market didn't get.

Parts that fit the G31

DR Forged wheels for the G31

Custom, made-to-order forged wheels — built to your car's spec, so any of them fits the G31. Pick the look; we build the fitment.

Browse all wheels

Tech essays for the G31

Upcoming events

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Set the G31 as your garage vehicle and the rest of the store filters to what fits it.

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Before you tune.

Will my dealer flag the tune at service?

The bootmod3 flash is non-destructive and reversible. Revert to stock before a dealer appointment and the ECU is back to factory in a few minutes; re-flash after service. We document the revert step in writing so the next person opening your file knows what's there.

Is it safe for the engine?

Every tune we ship has been datalogged on the car it was written for. We look at knock counts, fuel trims, boost behavior, and intake temps before we sign off. If the numbers don't sit right, we revise. That review and the revision policy are built into what the tune costs.

How long until I have a working tune?

Most calibrations turn around in a few days. We log, review, and revise before anything ships — we would rather get it right than get it out fast.

Can I go back to stock?

Yes. bootmod3 supports a stock revert that returns the ECU to factory calibration in under five minutes. The flash is non-destructive — nothing in the BMW DME is permanently modified. Most owners revert before trade-in.