Tuning · BMW 330e (G20 / G21)
330e
B48
The plug-in hybrid B48 in saloon and Touring form. Hand-calibrated from Stage 1 through to a hybrid-turbo build, with the electric assistance stacking neatly on top.
BMW 330e tuning
Samuel starts with the 330e's MG1 DME — the specific petrol-side calibration, your fuel grade, and the hardware sheet you submit. The electric motor contribution stays factory and stacks on top unchanged. Stage 1 goes in over OBD: 288 bhp · 420 Nm combined to 400 bhp · 600 Nm without any hardware changes. Stage 2 is calibrated around a downpipe and intake for 450 bhp · 720 Nm; Stage 3 is bespoke, built around the hybrid or big-turbo spec you submit.
Engine
B48
Stock
288 bhp · 420 Nm (combined)
Stage 3 ceiling
288 bhp
Configurator
Build your 330e tune
Choose your stage — Stage 1, Stage 2 or Stage 3 — add the options that fit your car, and send the full build to Samuel for a custom remote remap. He'll quote, schedule, and personally calibrate within 24 hours of confirmation.
Add a stage or add-on
£0
About this tune
The G20 / G21 330e (2019–present) is the PHEV version of the B48 3 Series — the same turbocharged 2.0-litre four paired with an 80 kW electric motor on the 8HP gearbox's input shaft. Combined system output from the factory is 288 bhp / 420 Nm; the B48 petrol side is calibrated conservatively to manage the hybrid torque budget. Samuel tunes both the G20 Saloon and G21 Touring to the same spec — the electric contribution stays unchanged, the petrol side gains headroom, and the combined figure moves up cleanly.
Compatibility
This 330e tune runs on Bootmod3, MHD or MG Flasher — all three flash the B48 over OBD. Compare platforms or see full B48 compatibility.
Engine guide
What the 330e map revision covers: B48 PHEV stages explained
The MG1 DME in the 330e controls the petrol side's boost pressure, torque limits, and fuel delivery — and the factory calibration runs all three conservatively to protect the hybrid system's torque budget. Samuel's Stage 1 map revises those targets to 400 bhp · 600 Nm combined from the OEM hardware; the electric motor contribution is unaffected and continues to stack on top. Stage 2 recalibrates around the expanded airflow from a downpipe and intake, targeting 450 bhp · 720 Nm combined; Stage 3 is built individually around whatever hybrid or big-turbo hardware is on the car, with every map log-reviewed after the first flash.
Stage 1
400 bhp · 600 Nm (combined)
No hardware required. The ECU map is revised via the OBD port on the MG1 DME, boost pressure, ignition timing, fuel delivery and torque limiters all adjusted. Combined system output moves from 288 bhp / 420 Nm to around 400 bhp / 600 Nm, with the petrol side doing the heavy lifting and the electric motor stacking on top exactly as it does from the factory. This is the BMW 330e chip tuning starting point, the most cost-effective single change available on the platform, and the most popular choice for both G20 saloon and G21 Touring owners.
Every tune Samuel produces is calibrated individually for the specific car, fuel grade and installed hardware, not a base map loaded and left. BMW 330e tuning done correctly means accounting for the PHEV-specific torque-management system as well as the standard B48 variables; the calibration is reviewed against your data logs after the first flash and revised before sign-off.
330e specs & stage targets
BMW 330e tuning at a glance
- Engine
- B48 · 2.0L turbocharged inline-four + electric motor
- Body styles
- G20 Saloon (PHEV) · G21 Touring (PHEV)
- Chassis codes
- G20 / G21
- Production
- 2019–present
- Drivetrain
- RWD plug-in hybrid
- Gearbox
- 8-speed ZF automatic
- Stock output
- 288 bhp · 420 Nm (combined)
- Tuning ceiling
- ~600 bhp on the right hardware
| Stage | Target |
|---|---|
| Stage 1 | 400 bhp · 600 Nm |
| Stage 2 | 450 bhp · 720 Nm |
| Stage 3, Hybrid Turbo | Up to 600 bhp depending on spec |
| Stage 3, Big Turbo Kit | Up to 600 bhp depending on spec |
FAQ
330e tuning — frequently asked questions
The calibrated 330e map is delivered to your BM3, MHD or MG Flasher account within 24 hours of payment. You flash it over OBD yourself in around 15 minutes — Samuel personally calibrates every file, no automated delivery.
Yes — the original MG1 stock file is supplied before you flash, so the car can return to factory calibration at any time.
A factory warranty can be voided if BMW attributes a failure to the tune — that's a personal decision. Samuel's 330e maps stay within the mechanical limits of the B48 hardware and are reversible to stock before any dealer visit. Many owners run tuned 330e cars without issue.
BM3 is the most widely used for the 330e and covers the MG1 DME with realtime monitoring through the app. MHD's B48 PHEV support depends on software version — confirm coverage with Samuel before ordering. MG Flasher has full B48 support on the G20 / G21. The calibration Samuel delivers is the same on all three; the platform is about your preferred flashing tool.
Yes — once you've driven the car on the new map, send your data logs back through your platform and Samuel reviews them before sign-off. The PHEV-specific torque-management system adds variables the first-flash review accounts for — if anything needs adjustment, the file is revised before the tune is considered complete.
Keep exploring
Keep exploring 330e tuning
Other B48 models we tune: G20 320i, 330i, G22 420i, 430i, 530e, 530i.
Engine guide
B48 tuning
Every B48 BMW we calibrate, with the full Stage 1, 2 and 3 breakdown for the engine.
Learn moreStages
Stage 1 & Stage 2 explained
What separates Stage 1 from Stage 2 on the 330e, the real-world gains and the hardware each one needs.
Learn morePricing
How tuning is priced
How the licence, off-the-shelf maps and custom calibration are priced. We quote your exact spec, never a fixed menu.
Learn moreGuide
What is bootmod3?
New to remote flashing? A plain-English explainer on the platform and how a custom map reaches your car.
Learn more