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DC Remapping UK
BMW F Series Tuning

BMW F Series 20d

N47 & B47 engine tuning, ZF8 gearbox software and dyno-proven results from Warrington's BMW specialists.

Stage 1 Available N47 Engine B47 Engine xHP Gearbox 4WD Dyno
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Overview

Two Engines. One Outcome.

The BMW F Series 20d comes with two different engines. Pre-2015 models generally carry the N47 engine, available in two power levels — the 163 BHP Efficient Dynamics and the 184 BHP version. Post-2015 cars use the B47. Both engines are paired with either the 6-speed manual or the 8-speed ZF8 automatic transmission.

Pre-2015
N47 Engine
Stock power163 / 184 BHP
Stage 1 power225 – 230 BHP
Stage 1 torque490 – 500 Nm
Units tuned500+
Post-2015
B47 Engine
Stock power190 / 190 BHP
Stage 1 power225 – 230 BHP
Stage 1 torque470 – 500 Nm
BMW on DC Remapping UK dyno BMW Touring on DC Remapping UK dyno
N47 Engine

Industry-Leading N47 Results

We have tuned in excess of 500 N47 engines at Stages 1 & 2. Our extensive R&D on this platform has led us to achieve industry-leading power figures, delivering fast real-world performance while maintaining long-term reliability.

N47 — Stage 1 Tuning
Stage 1
Stage 1 tuning requires no mechanical modifications. All factory emissions systems are left intact — the car remains fully MOT compliant with no visual modifications.
225–230
BHP
490–500
Nm Torque
N47 — Automatic Only
ZF8 Gearbox Tuning
The ZF8 transmission is controlled by the Getrag TCU. In stock format the box works well, but we can transform it to behave in a much sportier fashion — improving shift points, shift times, gear display logic, and the maximum torque limiter. These boxes are easily capable of reliably handling 900 Nm of torque.
View xHP Gearbox Software
B47 Engine

Modern B47 Platform

Post-2015 F Series 20d models use the B47 engine. This modern platform responds excellently to tuning, with Stage 1 delivering similar headline figures to the N47 while maintaining all factory systems.

B47 — Stage 1 Tuning
Stage 1
Stage 1 tuning requires no mechanical modifications. All factory emissions systems are left intact — the car remains fully MOT compliant with no visual modifications.
225–230
BHP
470–500
Nm Torque
B47 — Automatic Only
ZF8 Gearbox Tuning
The same ZF8 / Getrag TCU combination. We can improve shift points, shift times, gear displays and the maximum torque limiter. B47-equipped boxes are reliably capable of handling 900 Nm of torque after calibration.
View xHP Gearbox Software
Real World Results

BMW 320d — Dyno Sheet

DC Remapping UK · Rolling Road Result
BMW 320D 2.0 AT — Stock vs DC Stage 1 Custom
BMW 320d dyno chart - Stock vs DC Stage 1 Custom
Engine Power
Stock: 180.3 BHP @ 3948 RPM
232.2 BHP @ 3944 RPM
+51.9 BHP
Engine Torque
Stock: 404 Nm @ 2056 RPM
487 Nm @ 2391 RPM
+83 Nm
Wheel Power
Stock: 138.7 BHP @ 3636 RPM
194.5 BHP @ 3767 RPM
+55.8 BHP
DC Remapping UK · Rolling Road Video
BMW 320d — Live Dyno Run
Our Equipment

V-Tech 4WD Linked Dyno

X Drive Safe — Mechanically Linked Dyno
BMW's X Drive system cannot be safely run on a standard non-linked rolling road. Damage to the transfer box will result. We see many companies unplugging transfer boxes or disabling the 4WD system via software — this is far from ideal and often produces massively over-read torque figures. All our 20d tuning is conducted on our X Drive-safe 4WD linked dyno.

No matter what stage of tuning is selected, all cars are custom tuned on our mechanically linked (X Drive safe) 4x4 rolling road. Before any tuning work commences, your car is placed on the rolling road, full diagnostics are carried out and data logs taken to establish the health of the vehicle. DPF regeneration and minor adaptations are all carried out before tuning where required at no additional cost.

Our V-Tech 4WD Linked Dyno is specifically designed to handle the most complex and demanding systems, including X Drive. This ensures accurate and precise tuning for your vehicle, maximising performance and efficiency. Every vehicle is unique — our team of expert tuners is dedicated to delivering the best results for each customer.

Customer Reviews

What Our 320d Owners Say

“
JM
Jamie M.
BMW 320d (F30)
★★★★★
Had the Stage 1 remap and xHP gearbox done together on my F30 320d. The difference is night and day. Pulls properly through every gear now and the shift speed is unreal. Pre-tune health check flagged a minor fault I had no idea about. Sorted before tuning at no extra cost.
March 2025
“
CW
Craig W.
BMW 320d Touring (F31)
★★★★★
Travelled from Sheffield after seeing DC Remapping recommended multiple times in BMW groups. The 4WD dyno setup is impressive, proper equipment. Car went from 184bhp to 228bhp on the day. Fuel economy on my motorway commute has noticeably improved too.
February 2025
“
RP
Rob P.
BMW 320d xDrive (F30)
★★★★★
Really glad I went with DC Remapping over a generic tuner. The xDrive-safe dyno was the deciding factor for me, lots of places either refuse to do xDrive cars or unplug the system which defeats the point. These guys do it properly. Power gain is exactly as described, car feels completely transformed.
April 2025
“
SH
Scott H.
BMW 320d (F30) N47
★★★★★
Had the N47 Stage 1 done last month. Was a bit nervous as the N47 has a reputation but the guys clearly know this engine inside out, over 500 tuned speaks for itself. Car pulls 490nm now and feels like a different machine. Would not hesitate to recommend.
January 2025
BMW F Series 20d

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