DPF, EGR and AdBlue issues
DPF, EGR and AdBlue solutions
DPF, EGR and AdBlue systems are prone to blocking and failing, causing warning lights, poor performance, limp mode and expensive bills. We can help diagnose and fix the issue, at your home or workplace.
Find the cause before spending money
We check fault history and live data before recommending work. A failed sensor, split hose, dosing fault or underlying engine issue may be the real cause, and replacing an expensive assembly without testing can waste hundreds of pounds.
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- DPF loading and pressure checks
- EGR operation and airflow diagnosis
- AdBlue dosing and NOx-system faults
- A cost-effective fix tailored to your vehicle
Save on costly replacements
Replacing a failed AdBlue system or DPF at a main dealer can run to hundreds or even thousands of pounds. Our solutions are usually far more affordable and help stop the same problem coming back.
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Tell us the warning message, the symptoms and your registration, and we will explain how we can help.

Emissions-system modifications
Any modifications to emissions control systems (including DPF, EGR, OPF/GPF, and AdBlue solutions) are strictly provided for off-road and motorsport use only. It is illegal to use a vehicle on public roads with modified or removed emissions systems. MTechTuning accepts no liability for vehicles used illegally.
Recent jobs
Real cars, tuned on customers' driveways.

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

VW Golf R Mk8 Stage 1 & Simos 19.6 OBD ECU Unlock
320hp 405hp+85hp

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

Ford Fiesta 1.6 TDCi Stage 1 & EGR Solution
95hp 120hp+25hp

SEAT Leon 1.4 TSI 125hp Stage 1 Calibration
125hp 155hp+30hp
Customer feedback
