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HomeShopFiltersAir FiltersMercedes-Benz M-Class (W166) ML 250 CDI / Bluetec 4-Matic (166.004, 166.003) Air Filter – A 651 094 01 04 / A 651 094 01 04 64 (2011 – 2019)

Description

Buy Mercedes ML250 CDI Bluetec 4-Matic Air Filter A6510940104 Genuine OEM.

Mercedes ML250 CDI Bluetec 4-Matic Air Filter A6510940104 is a genuine Mercedes-Benz OEM replacement air filter specifically designed for Mercedes-Benz M-Class (W166) ML 250 CDI / Bluetec 4-Matic (166.004, 166.003) (2011 – 2019). It is compatible with OEM part numbers A 651 094 01 04 and A 651 094 01 04 64, ensuring precise fitment and reliable performance.

The premium multi-layer filtration media efficiently captures dust, dirt, pollen, sand and other airborne contaminants before they enter the engine intake system. It maintains unrestricted airflow while delivering excellent filtration efficiency for cleaner combustion and optimum engine performance.

Mercedes ML250 CDI Bluetec 4-Matic Air Filter A6510940104 improves combustion efficiency, turbocharger response, throttle response and fuel economy. It also supports smoother acceleration, consistent power delivery and reduced engine wear while maintaining the efficiency of the OM651 turbo diesel engine.

Regular replacement of the air filter protects vital engine components including the turbocharger, mass airflow sensor, intake manifold, intake valves and cylinders. Clean intake air helps extend engine life while maintaining factory performance, reliability and lower emissions.

Using a Genuine Mercedes-Benz OEM air filter guarantees factory-quality fitment, superior durability and long-lasting filtration performance. It is engineered to meet Mercedes-Benz quality standards for dependable everyday driving and long service life.

Buy Mercedes ML250 CDI Bluetec 4-Matic Air Filter A6510940104 from JK Automotive for 100% genuine Mercedes-Benz OEM spare parts, competitive pricing, expert technical support, secure packaging and fast shipping across India.

Compatible vehicles

ManufacturerModelYear-Range
Mercedes-BenzM-Class (W166)2011 – 2019

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Questions and Answers

How do I know if this air filter is the exact correct fit for my specific Mercedes-Benz M-Class luxury diesel model?
This engine air filter is precision-engineered to fit the third-generation Mercedes-Benz M-Class W166 platform, specifically the ML 250 CDI and Bluetec 4-Matic common-rail diesel variants carrying the 166.004 or 166.003 chassis designations built between the production calendar years of 2011 and 2019. To guarantee absolute compatibility with your vehicle, you must cross-reference your existing factory filter with the official original equipment manufacturer part numbers, which are designated as A 651 094 01 04 and A 651 094 01 04 64. This component is built specifically to accommodate the structural layout and unique high-pressure airflow requirements of the twin-turbocharged common-rail diesel inline-four OM651 engine configuration, ensuring a flawless airtight seal inside the factory air box housing. If you are currently shopping for the official Mercedes-Benz M-Class (W166) ML 250 CDI / Bluetec 4-Matic (166.004, 166.003) Air Filter - A 651 094 01 04 / A 651 094 01 04 64 (2011 – 2019) element, checking your vehicle’s identification number against your owner's service manual or consulting a certified Mercedes-Benz technician will confirm if your premium mid-size SUV uses this exact rectangular media configuration. Avoid ordering based solely on the model year, as mid-cycle refreshes or regional engine variations can alter the filtration system dimensions significantly across different markets globally. 
What are the primary performance benefits of upgrading to this premium engine air filter replacement?
Installing this premium replacement air filter directly restores and optimizes the internal combustion efficiency of your high-efficiency common-rail diesel ML 250 Bluetec power plant by maximizing clean volumetric airflow into the turbocharger intake system. The highly specialized synthetic or cellulose fiber blend media is structured with precise pleating density to capture micro-particles, road debris, soot, and pollen before they can compromise sensitive internal engine components or scratch cylinder walls. By minimizing airflow restriction while maintaining exceptional filtration efficiency, this component allows the twin-stage turbocharger to compress clean air more effortlessly, which directly translates to crisper throttle response and smoother overall acceleration across the power band. Upgrading your vehicle to a fresh Mercedes-Benz M-Class (W166) ML 250 CDI / Bluetec 4-Matic (166.004, 166.003) Air Filter - A 651 094 01 04 / A 651 094 01 04 64 (2011 – 2019) prevents the vehicle's electronic control unit from adjusting fuel trims unnecessarily to compensate for a choked intake system, thereby preserving your luxury SUV's original factory performance specifications. Investing in a high-quality filter ensures that your family vehicle maintains its iconic mechanical refinement and structural longevity for thousands of miles to come.
Can a clogged air filter affect the fuel economy and emissions output of my Mercedes ML 250 CDI / Bluetec 4-Matic?
Yes, a severely clogged or heavily contaminated engine air filter will drastically degrade your vehicle's fuel economy while simultaneously increasing harmful tailpipe emissions due to altered air-to-fuel ratios inside the combustion chamber. When air intake flow is constricted by trapped dirt and debris, the common-rail diesel engine is forced to work substantially harder to draw in the necessary volume of oxygen required for clean, complete fuel combustion cycles. This restriction induces a richer fuel mixture, meaning the engine burns more diesel than necessary, which rapidly decreases your miles per gallon and limits the performance optimization managed by the 4-Matic all-wheel-drive system electronics. Over time, running a vehicle without a pristine Mercedes-Benz M-Class (W166) ML 250 CDI / Bluetec 4-Matic (166.004, 166.003) Air Filter - A 651 094 01 04 / A 651 094 01 04 64 (2011 – 2019) setup places excessive strain on the oxygen sensors and can prematurely foul or clog your expensive diesel particulate filter or AdBlue SCR catalytic converter system due to excessive soot loading. Regularly replacing your filtration element ensures a crisp, clean burn that lowers environmental emissions, maximizes fuel efficiency, protects auxiliary exhaust electronics, and prevents unexpected diagnostic trouble codes or check engine lights from illuminating on your dashboard. [1, 2]
What is the recommended service interval for changing the W166 ML 250 d air filter?
The standard manufacturer recommendation for replacing the air filter element on a W166 Mercedes-Benz ML 250 diesel variant generally falls between every fifteen thousand to thirty thousand miles, or approximately every two years under ordinary highway driving environments. However, if you frequently operate your premium luxury SUV in severe driving conditions, such as heavy towing, off-road trail driving, congested urban commuter traffic, or dusty regional roads, you should inspect and replace the filter much sooner, potentially every ten thousand miles. Neglecting this simple preventative maintenance task causes the filter media to become saturated with fine atmospheric dust particles, which slowly chokes off the engine's oxygen supply and reduces the vehicle's operational efficiency. A good rule of thumb for luxury car care is to visually inspect the condition of your filtration system to determine if you need to install a new Mercedes-Benz M-Class (W166) ML 250 CDI / Bluetec 4-Matic (166.004, 166.003) Air Filter - A 651 094 01 04 / A 651 094 01 04 64 (2011 – 2019) unit to clear out excessive dark discoloration or trapped physical debris within the deep pleats. Replacing this inexpensive component proactively protects your precision-engineered OM651 powertrain from accelerated internal wear and guarantees that the engine always operates under optimal thermodynamic and mechanical conditions. 
What are the common symptoms that indicate my Mercedes-Benz W166 engine air filter needs urgent replacement?
When your Mercedes-Benz M-Class air filter becomes overly saturated with contaminants, your vehicle will exhibit several distinct physical warning signs that indicate an immediate replacement is required to prevent further mechanical degradation. You will likely notice a sluggish or delayed throttle response when pressing the gas pedal, as the twin-turbocharger setup struggles to pull enough fresh atmospheric oxygen through the blocked filtration media to accelerate efficiently. The engine may also exhibit a rough, unstable idle or produce unusual muffled coughing sounds from the intake tract when starting the car up cold in the morning. In more severe cases of air starvation, you might notice dark smoke or a strong smell of unburnt diesel exiting the exhaust pipe, accompanied by a noticeable drop in overall fuel economy and all-wheel-drive traction performance during highway acceleration layouts. For those maintaining their vehicles regularly, swapping old parts for a fresh Mercedes-Benz M-Class (W166) ML 250 CDI / Bluetec 4-Matic (166.004, 166.003) Air Filter - A 651 094 01 04 / A 651 094 01 04 64 (2011 – 2019) avoids triggering the mass airflow sensor to send error signals to the primary engine control module, ultimately illuminating the check engine light on your dashboard. 
Is it possible for a car owner to install this air filter at home without specialized mechanical tools?
Replacing the engine air filter on a W166 Mercedes-Benz ML 250 d is a relatively straightforward do-it-yourself task that can easily be completed in your home garage or driveway within approximately fifteen to twenty minutes using standard hand tools. The air filter housing is conveniently located on the side of the engine bay next to the structural reinforcement tower, and gaining access to the internal filter element typically requires only a standard Torx screwdriver or screwdriver set to safely loosen the retaining clips or fastening screws securing the plastic air box cover. Once you carefully undo the fasteners and lift the housing lid, you can slide out the old, dirty air filter while taking note of its exact directional orientation inside the tray. It is highly recommended to use a vacuum cleaner or a clean microfiber cloth to thoroughly wipe out any loose leaves, sand, or debris sitting at the bottom of the empty air box before dropping in the new filter. Ensure the new filter sits completely flush within the rubber sealing track around the perimeter of the box before lowering the lid back down and securely retightening all the factory fasteners.
How do the OEM part numbers A 651 094 01 04 and A 651 094 01 04 64 compare to aftermarket alternatives?
The original equipment manufacturer part numbers A 651 094 01 04 and A 651 094 01 04 64 represent the strict engineering standards, dimensions, and material specifications established by Mercedes-Benz for the premium common-rail diesel OM651 engine configuration. Premium aftermarket filters designed to match these specific part numbers utilize identical physical dimensions and high-grade filtration paper to provide a structural fit that is totally indistinguishable from the original dealership part. Opting for a certified replacement filter that explicitly references these exact OEM numbers guarantees that the rubber sealing gasket will perfectly fit the perimeter of your factory air box, preventing unfiltered air from bypassing the media. While generic, non-branded filters might appear cheaper at first glance, they often cut corners on pleat count, structural integrity, and gasket quality, which can lead to air leaks or rapid clogging that harms engine performance. Choosing a replacement unit that respects these official numbers ensures your car receives factory-level engine protection, optimized airflow, and long-lasting durability without paying the inflated prices often found at franchise dealership parts counters. 
How does a premium air filter protect the sensitive Mass Air Flow sensor inside the W166 diesel engine bay?
The Mass Air Flow sensor or integrated intake tract data electronics are highly precise components situated directly downstream from your air filter housing, and they rely on a clean environment to accurately measure the volume and temperature of air entering the engine. Fitting your luxury premium SUV with a high-grade Mercedes-Benz M-Class (W166) ML 250 CDI / Bluetec 4-Matic (166.004, 166.003) Air Filter - A 651 094 01 04 / A 651 094 01 04 64 (2011 – 2019) prevents microscopic dust particles, moisture droplets, and loose fibers from breaking away from the filter media and contaminating the delicate hot wire or sensor element inside the induction assembly. If a low-quality or degraded filter allows debris to pass through, these particles will bake onto the sensor's measuring electronics, causing it to send incorrect data to the engine computer regarding the incoming air volume. This contamination results in poor engine driveability, frequent misfires, rough shifting patterns from the automatic transmission, and expensive diagnostic repair bills for a replacement sensor. By investing in a high-efficiency filter with durable, non-shedding media fibers and a secure rubber seal, you effectively isolate this sensitive electronic sensor from atmospheric hazards, ensuring stable engine management performance. 

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