Thanks for contacting us! We'll get back to you as soon as possible

MagnaFlow OEM Grade Direct-Fit Catalytic Converter 52173 for the 2007-2012 Mercedes-Benz GL450 / GL550

}

MagnaFlow 52173 main product photo, alternate angle 2

}

MagnaFlow 52173 oem grade direct-fit catalytic converter, rear three-quarter view of the turntable spin

}

MagnaFlow 52173 oem grade direct-fit catalytic converter, opposite front three-quarter view of the turntable spin

}

MagnaFlow 52173 oem grade direct-fit catalytic converter, front three-quarter view of the turntable spin

}

MagnaFlow 52173 oem grade direct-fit catalytic converter, rear view of the turntable spin

}

MagnaFlow 52173 oem grade direct-fit catalytic converter, side view of the turntable spin

}

MagnaFlow 52173 oem grade direct-fit catalytic converter, opposite side view of the turntable spin

}

MagnaFlow 52173 oem grade direct-fit catalytic converter, opposite rear three-quarter view of the turntable spin

}

MagnaFlow OEM Converter 2007-2012 Mercedes-Benz GL450 Underbody 52173

Name: MagnaFlow OEM Converter 2007-2012 Mercedes-Benz GL450 Underbody 52173
Brand: Magnaflow
SKU: MAG52173
Price: 767.0 USD
Availability: InStock

Ask an expert

Vendor: Magnaflow

SKU: MAG52173

Regular price: $767.00
Regular price: ~~$767.00~~
Sale price: $767.00
Unit price: per

Apply at checkout

Not sure it fits? Text us your VINSee all fitment

Subtotal: $767.00

Quantity:

MagnaFlow OEM Converter 2007-2012 Mercedes-Benz GL450 Underbody 52173

Subtotal: $767.00

Questions before you buy? Talk to a specialist.

Fitment and product questions · 9am–6pm Pacific

Call(310) 231-0292 Text(310) 886-3111 ChatLive chat

Price match: found it cheaper?
Secure checkout · Shop Pay · Affirm
AutoTalent since 2006

Free Shipping

Free standard shipping on orders over $99

Coupon Code on First Order

Price Match Guarantee

Free shipping on $99+ order

30-days Returns

Overview

Late-model engines watch catalyst efficiency closely, so a 2007-2012 Mercedes-Benz GL450 / GL550 4.7L/5.5L needs a converter loaded to factory levels. MagnaFlow's OEM Grade 52173 is built for exactly that job and bolts in without cutting or welding. Coverage spans 6 model years: 2007-2012 Mercedes-Benz GL450 (Base), 2008-2012 Mercedes-Benz GL550 (Base) and 2008-2011 Mercedes-Benz ML550 (Base). This is the underbody converter position, so match it to the unit you are replacing. It ships at roughly 18 lb.

Features

OEM Grade loading sized for the 4.7L/5.5L OBD-II catalyst monitor
Underbody position
Fits 2007-2012 Mercedes-Benz GL450: Base
Fits 2008-2012 Mercedes-Benz GL550: Base
Fits 2008-2011 Mercedes-Benz ML550: Base

What is in the box

Gaskets and mounting hardware for installation

Specs

Part number	52173
Type	OEM Grade Direct-Fit Catalytic Converter
Emissions	Federal/EPA compliant (not for CARB states)
Grade	OEM Grade
Material	16-gauge 409 stainless steel
Shipping weight	18 lb

Construction

OEM Grade catalyst loading for engines with sensitive OBD-II efficiency monitoring
Bolts in where the original sat, with no cutting or welding
16-gauge 409 stainless tubing for a long service life
Spun body closed with a single laser-fusion weld to resist leaks
Mandrel-bent inlet and outlet pipes keep factory flow
OE-sized 410 stainless hangers
308 stainless MIG welds
Shape developed from 3D scans of the original part

Installation

Direct-fit and bolt-on; a capable DIYer can install it with the right tools, though professional installation is recommended.

Fitment notes

Sold for federal (EPA) emissions use only; it cannot be sold or installed in California, Colorado or New York. Check the fitment table below against your vehicle, including trim and engine.

Fitment

Make	Model	Chassis	Year	Engine
Mercedes-Benz	GL450 (Base)	—	2007-2012	4.7L/5.5L
Mercedes-Benz	GL550 (Base)	—	2008-2012	4.7L/5.5L
Mercedes-Benz	ML550 (Base)	—	2008-2011	4.7L/5.5L

Fitment

Year	Make	Model
2007–2012	Mercedes-Benz	GL450
2008–2012	Mercedes-Benz	GL550
2008–2011	Mercedes-Benz	ML550

Not sure? Text us your VIN and we’ll confirm.

Shipping & returns

Shipping: Orders ship via UPS, FedEx or USPS, from our facility near Los Angeles or directly from the manufacturer. Rates for many items are weight-based and shown at checkout. If you need it by a certain date, text us before you order.

Returns: Unused items in brand-new condition and original packaging can be returned within 30 days of the invoice date, with a 25% restocking fee unless otherwise specified. In some cases we can offer a lower fee with the balance as store credit. Shipping charges aren't refundable in either direction unless approved by AutoTalent.

Not returnable: special-order or custom items, and anything that has been installed, modified or altered.

Cancellations: free if the item is out of stock or we miss the ETA you agreed to. Other cancellations carry a 5% processing fee to cover card fees we can't recover. Special-order items can't be cancelled.

Damaged in transit? Report it to the carrier and to us within 48 hours, keep all packaging, and don't send anything back without our written approval.

Reviews & questions