Say goodbye to all issues!

Deleting

DPF error

AdBlue error

DEF error

EGR error

For Mercedes Diesel

We have developed a special OBD module that solves all problems related to the emission control system. No more hassles starting your car in just 3 minutes!

Delivery Worldwide just in several days

Find Cheaper Solution, Get Personal discount!

1-year warranty for each OBD module included

24/7 customer support anytime you want

MERCEDES OM651 NOX SENSOR

Live Examples Of Errors

What errors usually look like

If you’re searching for an om651 nox sensor fix, you’re likely dealing with an engine light, repeated fault codes, or a dashboard message that keeps returning even after resets. On many Mercedes diesel platforms, a single sensor issue can trigger restrictions quickly, which is why owners want a reliable way to keep the vehicle usable while they plan a permanent repair.

What the NOx sensor does on OM651

The NOx sensor is an oxide sensor used to measure nitrogen oxide in the exhaust stream so the ECU can control SCR dosing. On an OM651 motor, readings are monitored against operating conditions, including temperature and load. When the ECU detects a sensor fault, it can store a hard code, illuminate the engine light, and limit performance. Many listings call it a “sensor for mercedes” because fitment depends on the exact model and exhaust layout.

Front vs rear NOx sensor and why it matters

Depending on your setup, you may have a front nox sensor (often the upstream nox sensor) and a rear nox sensor for downstream monitoring. A fault on the upstream unit can influence dosing decisions directly, while a rear unit is used to verify reduction efficiency. Because the values are compared, a faulty nox sensor in either position can cause the ECU to flag “implausible” data and keep the warning active.

Upstream readings drift or spike: the ECU may treat it as a sensor problem and trigger limits
Downstream readings don’t match expectations: the ECU may log a sensor issue even if hardware seems fine

Why the same warning returns after repairs

Owners often find that sensor replacement doesn’t always end the issue. Wiring damage, heat stress, connector corrosion, or a failing temperature sensor can cause intermittent errors that look like a NOx failure. It’s also common to see confusion with other automotive sensors (oxygen sensor, knock sensor) when searching top content online, because generic guides mix different systems. On some vehicles, cooling system temperature instability can accelerate failures and trigger repeated checks.

A practical way to keep your vehicle driving

Our plug-and-play OBD tool is designed to remove SCR/NOx-related dashboard errors and restrictions without immediately changing parts. This helps you keep your vehicle operational while you diagnose the real cause and decide whether you should upgrade components, schedule service, or do a proper repair later. It’s a time-saving option when downtime is expensive and you need the display to stay clear of recurring warnings.

Compatibility and what to check

To find the correct approach for your mercedes benz vehicle (including mercedes benz sprinter variants), match the OM651 configuration and ECU type. The description on our site helps identify the right script for your model and emissions setup. UK and other regional variants can differ, so confirming your vehicle details is the best first step before ordering a new part or attempting sensor replacement.

Check Your Dashboard

Have you ever seen such lights?

If so, it's likely due to an AdBlue EGR, DPF, EKAS- related problems

Also Known As

The most common errors

Exhaust Fluid Reserve!

Refill Exhaust Fluid!

15 Starts Remaining!

Engine Start not possible in *** km (mi)!

Cannot measure fluid level!

ANY QUESTIONS? WE’RE HERE TO PROVIDE answers — JUST ASK!

What is OBD module

Encode your Sprinter with hand-held module to fix DEF issues forever

We have developed the module, looks like a simple OBD plug.
It can program ECU with maximum ease for everyone!

Universal solution

No Downtime

Ready To Go!

Easy To Use

Installing our module is as easy as switching on a kettle: just plug it in and wait for the download to finish.

No special knowledge required!

Best Solution

2026

Save Money

You may be facing a situation when the movement of your car is restricted or blocked, and you'll have to call a tow truck and go to the service. Any of our modules cost less than potential expenses for repair and a tow truck in such situation.

No Nerves

As it usually happens, a problem can arise at the most inconvenient moment: before a trip, during delivery of an order, etc. Instead of waiting until you encounter a problem, it's better to prevent it.

Easy Installation

The module is plugged into the OBD diagnostic port. The software is installed directly to the ECU. You don't require any tools, laptop or additional wires etc. Full plug-and-play solution.

Unlimited Use

You will receive our hand-held module. With it, you will be able to activate and deactivate selective catalytic reduction, EGR, DPF, and Swirl flaps when necessary. The device stays with you, there's no requirement to return it.

Saves warranty

The module stores several encodings, one of which is the Factory ECU map. At any time you can repeat the module installation process to activate/deactivate selective catalytic reduction, EGR, Flaps. This will help keep your dealer warranty and pass the emissions test.

Quality product

We offer a 1-year warranty on the module and will send a free replacement if it stops working.

24/7 Support

You will receive support from our expert in the shortest possible time, even on weekends.

Check out our benefits!

Installation takes just 3 MINS

Plug in the tool to the OBD diagnostic

There is a diagnostic connector in every car and access to it is simple and convenient. You simply have to insert our module into this slot.

CONFIRM SETTINGS ON THE COMAND SCREEN

The screen will allow you to select one of several scripts. Use the <> buttons to switch between them and the * button to confirm the selection.

Wait to be loaded

After selecting the script, the installation process will start. It takes from a few seconds to 10 minutes depending on the script. Just follow the instructions on the screen.

KEEP DRIVING WITHOUT LIMITS

When the installation is complete, remove the module, start the engine and make sure there are no more errors.

EASY SETUP WITH ALL MEDIA SYSTEMS

Watch these video instructions for installing the module and see how easy it is!

WE OFFER 3 SOLUTIONS

Our module will solve the problem of your vehicle being idle or spending extra money on repairs and finding a qualified mechanic.
Choose the right solution and install it yourself in a few minutes!

SCR ADBLUE / DEF DELETE

SCR total delete – no longer necessary to repair the SCR system and refill the AdBlue fluid

Whats include?

Completely remove Check Engine error

Completely remove 0 Remaining Starts error

Completely remove Starts idle error

Completely remove Check AdBlue error

Ability to roll back to factory settings

Maintains the dealer warranty

Easy pass emissions test ability

SALE!

one-time payment

Off-road use only - about usage

PACKAGE DEAL

We suggest deleting all of the following components together (SCR, EGR, Flaps and DPF) as all of these elements work together as one system

Whats include?

Completely disables SCR (DEF) system on equipped vehicles

Completely disables EGR valve

Completely disables Swirl Flaps in the intake manifold

Optionally disables Diesel Particulate Filter

Ability to roll back to factory settings

Maintains the dealer warranty

Easy pass emissions test ability

ECU Tune Stage 1

SALE!

one-time payment

Off-road use only - about usage

ADBLUE (DEF) COUNTER RESET

Temporary solution – start the engine and drive to workshop without limitations but the SCR still needs to be repaired

Whats include?

SCR system continues to work

Ability to reset engine starts counter as many times as needed

Absolutely legal

Maintains the dealer warranty

SALE!

one-time payment

What you'll run into without our module

You might not see them coming, but additional issues are often part of the package. It's the heads-up every customer needs.

Dealers delay

Waiting on car parts from a dealer? Brace for delays. Parts often aren't in stock, and delivery dates can shift, leaving you hanging. Dozen of surprises.

Wasting money

Repair expenses hit hard. High costs for parts and labor, plus dealer markups, and downtime mean losing more money. It's a major financial issue for truck owners.

Repair downtime

Bracing for repairs? Parts and labor are pricey, and there's always a chance of finding more issues, especially with the exhaust system.

Why better choose package deal

Just a quick heads-up on the headaches our solutions will save you from. Through years of experience, we've nailed down our customers' top issues and crafted the perfect fix for each. A package deal – it's an all-in-one solution.

Exhaust Gas Recirculation or EGR

Soot builds up on the valve, which can interfere with its operation and cause it to fail. Repairs are expensive and difficult. And most often the repair period takes a long time.

AVERAGE COST

How much you'll save

2000

Selective Catalytic Reduction or SCR

The SCR system consists of a large number of components that can fail. The most expensive breakdown is the DEF level sensor in the tank, as it will require replacing the tank entirely.

AVERAGE COST

How much you'll save

3000

Swirl Flaps in the Intake Manifold

Also, soot builds up in the intake manifold, which will interfere with the operation of the flaps. In this case, the entire exhaust manifold will have to be replaced, which is very expensive.

AVERAGE COST

How much you'll save

3500

Diesel Particulate Filter or DPF

Remove the DPF when it is clogged and only if you don't want to buy a new one, because it is very expensive. In that case we could add coding additionally so you can remove the DPF when the time comes.

AVERAGE COST

How much you'll save

5000

Tons of issues out there, but we've got one solid fix ready to go!

Get some additional features for your solution!

ADDITIONAL OPTION ECU TUNE STAGE 1

We install extra firmware to cut fuel use and save you 10% on gas. Pretty cool, right?

Dyno & Track tested performance results:

Engine: OM651 2,1L. Gain: +30 HP, +44 ft-lb
Engine: OM642 3,0L. Gain: +40HP, +49 ft-lb

ALREADY INCLUDED IN THE PACKAGE DEAL

SEPARATE CODING OF DPF DELETE OPTION

With this coding, you’ll have the option to remove the DPF from the system.

We advise only removing it if it's fully clogged and replacement or removal is required. Removing it early has no real benefit, so it’s best to wait until it’s truly necessary.

Reviews from our clients

Check out the experiences of clients who have successfully solved their problem with our module.

Swipe left to see more

The updated code seems to be working. I was able to run it for shot trip and I did not get any egr related codes. I would like to proceed with our other sprinter. Same tune, DEF delete, egr delete, and performance.

Rate

Vishal P, US

2017 Sprinter City • Mar, 7, 2024

I don't usually write reviews, but okay. This is the best way to delete AdBlue for your car. Made me love my car again. All the information that is advertised on the website and discussed before the payment was true.

Rate

Jeff Morris, US

2018 Sprinter 319 • Feb, 6, 2024

This is an absolute fantastic product. Instead of eating to the nearest Mercy 200mi specialists, you just plug in this device and it's done in few minutes and the best thing is that you can get it back to original map in minutess.

Rate

Dave R.A., CA

2011 Sprinter 2500 • Mar, 23, 2024

The code is gone! Almost finished running the delete now. Once again, I'm very pleased with how easy this has been as well as your service! Thank you so much.

Rate

Johnatan, US

2012 GL350 • Jan, 31, 2024

Just letting you know that I received the package and installed it on one of my vans already. Everything seems to be working great. Thank you again.

Rate

Gabe, US

2014 E250 Bluetec • Mar, 18, 2024

Thanks again great customer service and tech-support! So far everything is working great. I drove it on the freeway for about 40 minutes.

Rate

Chad S, CA

2020 Sprinter 4x4 • Apr, 2, 2024

Pay in any way convenient
for you

You can make payment using any of the options offered. Looking for an alternative?
No problem - just tell us which one
is best for you!

Debit or credit cards

Visa Mastercard payment is possible with any bank card

Apple Pay or Samsung Pay

You can pay in one click using Apple Pay or Samsung Pay

PayPal Payment

Choose PayPal payment and enjoy buyer protection

Bank wire transfer

For companies there is a possibility to pay by bank transfer

We will deliver your package all around the world

Resolve your issue easily and fast, no matter your location!

Delivery Information

We offer worldwide shipping through our partnerships with UPS, FedEx, and DHL Express, ensuring your package is dispatched swiftly and reaches you as quickly as possible.

While we strive for immediate dispatch, please allow an average of 1-3 days from order placement for delivery.

Delivery Terms

FedEx

In average requires 5-8 business days

DHL Express

Deliver the parcel for 2-4 business days

UPS

Typically delivery takes 2-4 days

Additional options

Why choose us

Because we are extremely attentive to each order and offer a range of delivery options.

Real time tracking

You can track the location of your parcel at any time using the tracking number that we send to each client.

Tax free

Your order is declared as a low-value diagnostic tool, ensuring quick clearance and minimal fees.

PERSONAL DISCOUNT

We will give you a personal discount if you find an analogue of our module at a price lower than ours!

Product replacement

Unforeseen situations do occur, and if something happens to the parcel, we will send a new one at our expense.

Reliable packaging

We pack each shipment with high quality, so you don’t have to worry about the safety of the contents.

24/7 customer support

We constantly monitor each shipment and can advise on delivery times at any moment.

Additional information

On mercedes-benz diesel platforms, a nox warning can come back over and over even after you change a sensor, because the ECU compares nox values against operating conditions such as air flow, load, and temperature. If the car has small air leaks, unstable oil vapors through the intake, or wiring that flexes, the nox signal can drift and the car will store a fault. When the car is pushed under power, heat rises and the nox reading may spike; when the car cools, the nox reading may drop—either way the ECU may still flag the same nox issue and keep the dash alert active. That is why many car owners end up buying parts prematurely, while the underlying cause is the environment around the sensor and the test conditions.

Our plug-and-play tool helps keep the car usable by suppressing nox-related dashboard restrictions so you can keep driving while you diagnose. With the right equipment, you can check the harness, connectors, and exhaust joints, then decide whether to change the defective unit or repair wiring instead of swapping parts. This approach reduces downtime when nox faults appear on a mercedes-benz vehicle and lets you plan the correct fix without losing workdays.

If a nox fault keeps returning, the car may still be reacting to stored conditions rather than a fresh failure. Clear the warning, drive, and recheck nox values to confirm whether the nox issue is stable; if the nox reading is inconsistent, the ECU may keep logging the same nox event. Our tool can suppress nox-driven limits so the car stays usable while you identify which parts truly need attention and avoid buying parts that don’t solve the root cause.

When a nox warning keeps coming back, the sensor data may be unstable rather than completely dead, and the car will keep storing events until the ECU sees consistent values. One sensor can read hot, another sensor can read slow, and the car may flag the mismatch as a nox error even after a reset. If the engine is under load, the nox level can shift quickly; if the engine cools down, the nox level can shift again, and the car can still trigger the same fault. That’s why swapping parts immediately can be risky: you might replace parts that are fine while the real sensor issue is wiring, heat, or exhaust leaks. Our tool helps keep the car usable by suppressing nox-related dash limits so you can test the sensor signal under real engine conditions and decide which parts truly need replacement.