4.9 · 264+ reviews
Pay with Klarna · ★ 4.9 · 264+ Google reviews · In-house 4WD dyno · before & after printout · BMW ECU unlocking · in-house, same day · 0% finance with Bumper · spread it over 6 months · 10,000+ vehicles tuned · 14+ years · BMW & VAG specialists · Warrington · Pay with Klarna · ★ 4.9 · 264+ Google reviews · In-house 4WD dyno · before & after printout · BMW ECU unlocking · in-house, same day · 0% finance with Bumper · spread it over 6 months · 10,000+ vehicles tuned · 14+ years · BMW & VAG specialists · Warrington ·
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Customer BMW 335d F30 with the N57 engine on the DC Remapping 4WD dyno

BMW Tuning  /  BMW 35d

N57 Specialists · 14 Years Experience

BMW 35d Stage 1 RemapUp To 390bhp

N57 Tuning Specialists · Custom Dyno Tune & xHP Gearbox SoftwareThe N57 35d is one of BMW's finest engines – but it leaves serious performance on the table from the factory. With over 14 years specialising exclusively on the N57 platform, we build every tune completely from the ground up on the dyno. Customers travel from all over the UK to have their car tuned by us.

390bhpUp To (Stage 1)
770NmTorque
1000+N57s Tuned
14+Yrs N57 Experience
Book Your 35d InSee Pricing Below

The Platform

BMW N57 35d Engine

The 3.0-litre straight-six twin-turbo diesel controlled by the Bosch EDC17CP45 ECU paired with the ZF8 automatic transmission. BMW quotes 313bhp and 620Nm – on our 4WD dyno we see factory figures closer to 295–305bhp and 590–610Nm. Having worked exclusively on the N57 platform for over 14 years, we know every map parameter of this engine inside out – which is why customers travel the length of the UK to have their car tuned by us.

3.0LStraight-Six
TwinTurbo Diesel
ZF8Auto Gearbox
xDrive4WD (most models)

Covers: BMW 335d · 435d · 535d · X5 40d · X6 40d · 640d (F-Series)

On our dyno

BMW 435d xDrive on our 4WD dyno

BMW 335d N57 Stage 1 Dyno Graph – Before and After
BMW 335d N57 Stage 1 dyno graph, before and after

ECU Remapping

Choose Your Stage

Every tune is built completely from the ground up on the dyno – never a generic off-the-shelf file. We start with a blank slate on every car and refine through multiple runs until the result is exactly right.

Stage 1

Custom Dyno Tune

No hardware mods needed. Full MOT compliance. Every tune built completely from scratch on the dyno – not a generic file flashed on a laptop.

From ~300bhpUp to 390BHP
From ~600Nm750–760Nm
  • Built from zero – no base maps, no generic files
  • Custom calibration on our 4WD linked dyno
  • Pre-tune diagnostics & DPF regeneration
  • Full health check & live data logging
  • Before & after dyno printout
  • All factory emissions systems intact
£449Engine Tune

Finance available

Book Stage 1 →

Best Value Most Popular

Stage 1 + xHP ST3

The complete N57 transformation. Custom dyno tune plus xHP Stage 3 gearbox software – the combination our customers travel across the UK for.

From ~300bhpUp to 390BHP
From ~600Nm778Nm
  • Full Stage 1 custom dyno tune (ground-up)
  • xHP Stage 3 gearbox software
  • Torque limit removal for full engine potential
  • Dramatically faster, sharper gear shifts
  • Before & after dyno printout included
  • Real dyno results – BMW 435D X-Drive
£649Save £125

Finance available

Book This Package →

Stage 2

Hardware + Tune

For those who want the absolute maximum. Supporting hardware upgrades combine with our custom calibration for the biggest gains.

Stage 1 base400–410BHP
Stage 1 base800–830Nm
  • Requires: downpipe / DPF gutting
  • Requires: uprated intercooler
  • Custom fuelling & boost calibration
  • Multi-session dyno refinement
  • Tailored to your exact hardware setup
POAEnquire
Enquire Now →

xHP Gearbox Tuning

ZF8 Transformed

The ZF8 in the 335d and 435d is already exceptional – but when optimised with xHP software it becomes something entirely different. Faster, sharper, smarter.

The ZF8 handles up to 900Nm with ease, making it the perfect partner for Stage 1 and Stage 2 engine tuning. Adding xHP Stage 3 alongside a Stage 1 tune pushes torque to 770–780Nm.

  • Dramatically faster shift speed & smoothness
  • Gear display in all driving modes
  • Torque limit removal for full engine potential
  • Improved launch control performance
  • Smarter shift points for sport & comfort
£325xHP ST1
£325xHP ST2
£325xHP ST3
Gold

xHP Gold Dealer
The top tier of the xHP dealer network, with every flash done in person at our Warrington workshop.

390

Combined Results (Stage 1 + xHP ST3)
Up to 390 BHP · 778 Nm
Real dyno results – BMW 435D X-Drive 3.0

Best Value

The Bundle

Our best-value package combining Stage 1 custom dyno tune with xHP Stage 3 gearbox software – everything you need for the full transformation.

Engine + gearbox

Performance
Bundle

  • Stage 1 Custom Dyno Tune£449
  • xHP Gearbox Tuning (ST3)£325
Usually £774Bundle Price
£649

You save £125

Finance available

Book This Offer →
Trusted by 10,000+ Drivers4.9 Star RatedCustomers UK-Wide

Dyno Tuning & Safety

4WD Linked Dyno

All BMW xDrive vehicles are tuned on our mechanically linked 4WD rolling road – the only safe way to tune an all-wheel drive vehicle with real accuracy. Every tune is built completely from the ground up, not a generic file loaded onto your ECU.

Unlike non-linked dynos which can damage the transfer box or give false torque readings, our dyno provides accurate real-world data. We start with a blank slate on every car – building the calibration from scratch through multiple dyno runs until the result is exactly right. 14 years on the N57 means we know exactly what this engine needs.

  • Full diagnostics and live data checks on arrival
  • Health assessment & DPF regeneration if required
  • Tune built from zero – no base maps, no generic files
  • Before & after dyno runs with printed results
  • Iterative tuning until peak performance is achieved

DC Remapping vs Generic Tuners

Generic FileDC Custom
ApproachFlash & goBuilt from scratch
Dyno Type2WD or none4WD linked
ExperienceUnknown14+ Yrs N57
Your CarUnknown conditionHealth checked
Gold

xHP Gold Dealer
The top tier of the xHP dealer network. Trusted by BMW owners across the UK.

0%
Finance AvailableSpread the cost over 6 months – interest free. No hidden fees.
  • 6 Month Plan
  • Quick Application
  • 0% Interest
Find Out More →

Measured on our dyno

BMW 35d results from our own dyno

We have been tuning the N57 35d for over 14 years. Every car below is a customer car, run on our in-house 4WD dyno in Warrington before and after the map. These are the printed figures, not a file supplier’s estimate.

Dyno sheet for a customer BMW 335d xDrive: 300.2 to 387.0bhp, 600 to 779Nm

BMW 335d xDrive

F30 · N57 3.0 diesel · Stage 1 + xHP ST3

Power
300.2387.0+86.8
Torque
600779+179
Read the buildOn our results page
Dyno sheet for a customer BMW 335d xDrive: 310.0 to 387.1bhp, 629 to 770Nm

BMW 335d xDrive

F30 · N57 3.0 diesel · Stage 1 + xHP ST3

Power
310.0387.1+77.1
Torque
629770+141
Read the buildOn our results page
Dyno sheet for a customer BMW 640d Gran Coupé: 305.2 to 387.5bhp, 628 to 770Nm

BMW 640d Gran Coupé

F06 · N57 3.0 diesel · Stage 1 + xHP ST3

Power
305.2387.5+82.3
Torque
628770+142
Read the buildOn our results page
Dyno sheet for a customer BMW 640d Gran Coupé: 307.5 to 389.4bhp, 626 to 770Nm

BMW 640d Gran Coupé

F06 · N57 3.0 diesel · Stage 1 + xHP ST3

Power
307.5389.4+81.9
Torque
626770+144
Read the buildOn our results page

The 35d in numbers

Engine
N57 3.0 twin-turbo straight-six diesel, 313hp version
Found in
335d, 435d, 535d, 640d, X5 and X6 40d (F-series)
Standard
313bhp · 630Nm (465 lb-ft)
Our Stage 1
390bhp · 780Nm (575 lb-ft) on a healthy car
Gearbox
ZF 8HP automatic · xHP gearbox software £325
ECU
Bosch EDC17CP45
Locked ECU?
Most N57 cars were built before BMW started locking ECUs in mid-2020. If yours is later, we unlock it on our own bench the same day for £100 on top of your tune.
Stage 1 price
£449, custom mapped on our dyno

What 35d owners say on Google

4.9 from 264+ Google reviews
★★★★★
Amazing results on my Bmw 335d F30 achieving 388hp and 771nm stage 1 with the XHP stage 3 on the ZF8 , great customer service, travelled 5hrs round trip i would definitely recommend, tranformed the car enormously.
Jon copland · BMW 335d F30 · Google review
★★★★★
Booked my 335d for engine and gearbox map. I asked Dan a few questions which he answered in full and so it began. Car made 389Hp with 777Nm torque, it began with 304Hp and 605Nm torque, which is amazing without any hardware changes. Car feels so responsive now and pulls like a beast. I highly recommend DCremapping to look after your car and you will definitely feel the difference. Dan is the man !!
Ian Frost · BMW 335d · Google review
★★★★★
Took my BMW 335D xdrive in for a stage 1 remap and gearbox re map massive gains from 304hp to 388hp and torque Gaines from 629nm to 781nm a massive difference really happy thanks Guys
Adam Bunting · BMW 335d xDrive · Google review
★★★★★
Excellent service from the DC team. They stage 1 remapped my F11 535d from 310bhp to 390bhp and I got a sizeable toque boost too. No fuss, just very good and efficient service. My car was ready in 3 hours and the gentleman that I was dealing with was very courteous and professional. I believe his name was Daniel. Thanks again
Umer Akhtar · BMW 535d F11 · Google review
★★★★★
Hi, travelled from Sheffield for this re-map after lots of positive feedback via both online posts and reviews. Was well worth the visit the garage are very knowledgeable and the outcome couldn’t be any better my 435d is now an M4 killer lol ;-)
Joe Wragg · BMW 435d · Google review
★★★★★
I booked in here with my 335d touring after reading the good reviews and I’m glad I did. Just the stage 1 and gearbox map has completely transformed the car. Definitely worth the 5hr round trip. Would definitely recommend
Gary haines · BMW 335d Touring · Google review

Quoted word for word from our Google reviews. Read them all on Google.

FAQs

BMW 35d Tuning Questions

How much power will a Stage 1 remap add to my BMW 35d?
Our Stage 1 maps are custom-built on our in-house 4WD dyno and tailored to your exact BMW 35d, never a generic off-the-shelf file. You'll see a substantial, fully dyno-proven gain in both power and torque; the headline figures for this platform are shown at the top of this page. Because every map is refined over multiple runs, the results are realistic, repeatable and safe.
Is remapping my BMW 35d safe and reliable?
Yes. We tune strictly within the safe mechanical limits of your BMW 35d's engine and gearbox, monitoring temperatures, pressures and torque loads across multiple dyno pulls. We've spent 14+ years tuning these platforms, so our maps prioritise long-term reliability alongside performance.
Will a remap affect my warranty or insurance?
A remap is an aftermarket modification, so it's the owner's responsibility to declare it to their insurer. Our maps are fully reversible, we keep your original factory file and can return the BMW 35d to completely standard whenever you need, for example before a main-dealer visit.
Is the remap reversible?
Completely. Your original factory software is saved before we start, so your BMW 35d can be returned to stock at any time.
Will tuning improve my BMW 35d's fuel economy?
We tune for performance, not fuel economy, so we don’t promise or guarantee any MPG saving. How much fuel the car uses comes down mostly to how it’s driven, and using the extra performance will use more.
How long does it take, and do you tune on a dyno?
Most Stage 1 tunes are completed within a few hours; allow up to a day for combined ECU and gearbox work. Every BMW 35d is mapped on our in-house 4WD dyno in Warrington, never on the road, so the result is measured and consistent. You're welcome to relax in our customer waiting area while we work.

Check Your Vehicle

See What Your Car Will Make

Pick your make, model and engine for the expected Stage 1 and Stage 2 gains, your price, and book straight from the result.

Choose your make to begin.

BMW 335d F30 on the DC Remapping UK 4WD dyno

Real Customer Result

BMW 335d F30

N57 · Stage 1 + xHP ST3

300 → 387 bhp 779Nm

This 335d came in at 300bhp and left at a dyno-proven 387bhp and 779Nm with the full engine + gearbox package.

Read The Full Build →

Ready to transform your 35d?

Book online or call us to discuss your vehicle

Book Appointment →Get a Free Quote

Explore More

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