Mercedes GL450 Cooling Fan & Shroud Assembly - GL320 ML550 2007-2012 (OE A1645000093)

Mercedes GL450 Cooling Fan Assembly – Direct-Fit Replacement

If you're chasing an overheating gauge, warm air out of the AC vents at idle, or a fan that sounds like it's grinding metal under the hood, this Mercedes GL450 cooling fan assembly is built to solve it. It's a complete electric fan-and-shroud unit engineered to the same specs as the original equipment fan on your GL-Class or ML-Class, so it bolts in, plugs in, and gets your cooling system back to doing its job — no cutting, no adapters, no guesswork.

This isn't a generic aftermarket fan pulled from a parts bin and relabeled. It's built to OE dimensions and electrical specs, referencing part numbers A1645000093, A1645000393, and 1645000093 — the same numbers you'll find stamped on the fan currently failing in your engine bay. Swap it in and the mounting points, the shroud shape, and the 4-pin connector all line up the way they're supposed to.

Signs Your Fan and Shroud Are on the Way Out

Cooling fans on the X164 and W164 platform (GL and ML-Class) tend to give warning signs before they quit outright, and most owners chalk them up to something else until the temp needle starts climbing. Watch for:

• Temperature creeping up in traffic or at idle. Highway airflow can mask a weak fan, but the moment you're sitting at a light in July, a failing motor or cracked shroud shows up on the gauge fast.
• The AC blows warm when you're stopped. Your AC condenser sits right in front of the radiator and relies on the same fan. A slow or seized fan is a top reason AC goes from cold on the freeway to lukewarm in a parking lot.
• Grinding, clicking, or a fan stuck running at full speed. Worn bearings, a chipped blade, or a fried relay circuit all show up as noise or a fan that no longer cycles properly.
• A shroud that's cracked or missing chunks. The shroud directs airflow through the radiator core. A broken one lets air spill around the sides instead of through the fins, so cooling drops even if the motor is fine.

Any of these on a 3.0L diesel, 4.6L/4.7L V8, or 5.5L V8 in this vehicle family is worth taking seriously — these engines run tight tolerances, and sustained overheating can turn a $200 part into a much more expensive repair down the road.

Why a Direct-Fit Mercedes GL450 Cooling Fan Beats a Universal Unit

It's tempting to grab whatever cheap universal fan shows up first in a search, but universal fans are a gamble on a vehicle like this. The shroud won't match the radiator opening, the mounting tabs won't line up with the factory brackets, and the wiring rarely plugs straight into your harness — so you end up splicing connectors and hoping the amperage draw doesn't overload a circuit it wasn't built for. A proper Mercedes GL450 cooling fan assembly like this one is shaped and wired to match what Mercedes engineered, which means correct airflow volume, a housing that seals against the radiator properly, and a 4-pin plug that connects directly with no rewiring.

This assembly is an 11-blade, plastic-housed electric fan and shroud rated at 850W, built to move real air volume rather than just spin fast and sound busy. It's rated for a maximum rotational speed north of 1900 RPM and stays at or under 96dB, so it does the job without becoming the loudest thing in your driveway.

Specifications

• Type: Complete fan & shroud assembly, electric drive
• Material: Plastic housing and blades
• Blade count: 11 fan blades
• Connector: 4-pin terminal
• Wattage: 850W
• Maximum rotational speed: 1900+ RPM
• Noise level: ≤96dB
• Placement: Engine compartment, front-mounted, direct OE-position fitment
• Warranty: 1-year manufacturer warranty
• OE / reference numbers: A1645000093, A1645000393, 1645000093
• Package contents: 1x fan & shroud assembly (installation instructions not included)

Full Vehicle Fitment

While this Mercedes GL450 cooling fan is the headline application, the same assembly is correct for a wider range of GL, ML, and R-Class models built on the X164 and W164/W251 platforms. Always confirm your exact model, engine, and build year against your VIN or a trusted parts lookup before ordering, since Mercedes carried multiple engine variants across these years:

• GL320 – 3.0L V6 Diesel (X164), 2007–2009
• GL350 – 3.0L V6 Diesel (X164), 2010–2012
• GL450 – 4.6L V8 Petrol, 2007–2012
• GL450 – 4.7L V8 Petrol (X164), 2007–2009
• GL500 – 5.5L V8 Petrol (X164), 2008–2012
• GL550 – 5.5L V8 Petrol (X164), 2008–2012
• ML320 – 3.0L V6 Diesel (W164), 2007–2008
• ML350 – 3.0L V6 Diesel (W164), 2010–2011
• ML550 – 5.5L V8 Petrol (W164), 2008–2011
• R320 – 3.0L V6 Diesel Wagon (W251), 2007–2009

What's in the Box

Each order includes one complete fan and shroud assembly, ready to mount in the factory location. Installation instructions aren't included, so if you haven't replaced a fan assembly on this platform before, we'd recommend having a shop handle it — getting the shroud seated correctly and the harness routed away from moving parts makes a real difference in how the fan performs.

Buying With Confidence

We back this part with a 1-year warranty, and our team is happy to help you double-check fitment before you buy — message us through our contact page with your VIN or engine code and we'll confirm it matches. If you want more background on how radiator fans, shrouds, and the rest of the cooling loop work together, the Wikipedia overview of internal combustion engine cooling is a solid, independent explainer.

Before you order, take a look at our frequently asked questions for common fitment and installation questions, and our warranty policy for full coverage details. Once your order ships, you can follow it on our order tracking page, and our shipping information page covers processing times and carrier details. If you're not seeing the exact part your Mercedes needs, our request a part page lets you send us the details and we'll try to track it down.

Browse more parts for this platform in our Mercedes-Benz collection, or check related components in our Cooling System parts collection and Electrical Parts collection. A working cooling fan is cheap insurance against a much bigger repair bill — if yours is loud, slow, or not spinning at all, this direct-fit assembly gets your GL or ML back to running the way it should.