BMW 335d and 435d tuning
BMW 335d and 435d remapping in Bristol, Somerset and South Wales
The twin-turbo 335d and 435d are among the most rewarding diesels to tune, with enormous torque and strong economy. We come to you from our Weston-super-Mare base, across Bristol, Somerset, Gloucestershire, Wiltshire, South Wales and parts of Devon and Dorset.
BMW 335d and 435d generations we tune
Factory figures vary by market and year. We confirm your car's exact ECU and software before quoting.
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E90/E92/E93 335d (2006–2012)
M57 twin-turbo 3.0 diesel, 286hp and 580Nm.
F30/F31 335d xDrive (2013–2019)
N57 twin-turbo, 313hp and 630Nm.
F32/F33/F36 435d xDrive (2014–2020)
N57 twin-turbo, 313hp and 630Nm.
What a remap does on the 335d and 435d
These twin-turbo diesels respond superbly. The 286hp E9x 335d (M57) targets 350hp and 680Nm on Stage 1 and 365hp and 730Nm on Stage 2, and the F30 335d, 335xd and 435d reach 370hp and 730Nm at Stage 1. Figures are approximate targets and depend on the car's condition, fuel quality and supporting hardware.
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With torque figures this high, we always pair the engine calibration with a gearbox tune and check the car's health first.
Gearbox tuning
The ZF 6-speed and 8-speed are mapped for higher torque limits, which is essential on a car making this much torque.
Examples of our BMW 335d and 435d work
- BMW 335xd Stage 1 & Gearbox Tune313 → 370hp
- BMW 335d Stage 1313 → 370hp
- BMW 335xd Stage 1 & ZF8HP Gearbox Tune (February 2026)313 → 370hp
- BMW 435d Stage 1 & Gearbox Tune (September 2025)313 → 370hp
- BMW 435d Stage 1 & Gearbox Tune313 → 370hp
- BMW 335d Stage 2 (April 2024)286 → 365hp
- BMW 335d Stage 2 (February 2024)286 → 365hp
Related BMW pages
Common questions
Is the 335d a good car to tune?
One of the best. Its twin-turbo straight-six makes huge torque gains while keeping strong economy.
Do I need a gearbox tune?
Yes, we recommend it. The extra torque needs higher gearbox torque limits.
Recent BMW jobs
BMWs we have tuned, with their figures.

BMW X1 18d Stage 1 with DPF, EGR & Swirl Flap Solutions
136hp 180hp+44hp

BMW M135i F40 Stage 1 & Same-Day MG1 ECU Unlock
306hp 335hp+29hp

BMW 330e G20 Stage 1, Same-Day ECU Unlock & Gearbox Tune
292hp 400hp+108hp

BMW M340i G20 Stage 1, Same-Day ECU Unlock & Gearbox Tune
374hp 450hp+76hp

BMW G20 320i Stage 1 Remap & Same-Day MG1CS201 ECU Unlock
184hp 260hp+76hp

BMW 128ti F40 Stage 1 & MG1 ECU Unlock
265hp 310hp+45hp

BMW M235i F44 Stage 1 & Same-Day MG1 ECU Unlock
306hp 335hp+29hp

BMW M235i N55 Stage 2 ECU Calibration
326hp 415hp+89hp

BMW X5 G05 xDrive30d Stage 1, Gearbox Tune & MD1 Unlock
265hp 330hp+65hp

BMW 430d F32 Stage 1 Remap & EGR Solution
258hp 320hp+62hp

BMW 320i G20 Stage 1, Gearbox Calibration & Bench Unlock
184hp 260hp+76hp

BMW 430d F36 Gran Coupe Stage 1 Calibration
258hp 320hp+62hp

BMW 730d Stage 1 Engine Tune
265hp 330hp+65hp

BMW 330e Stage 1 (July 2026)
292hp 400hp+108hp
Customer feedback
