}
}
}
}
}
}
}
}
}
}
Brand: MagnaflowSKU / Part #: MAG21-551
- Regular price
- $1,623.00
- Regular price
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$1,623.00 - Sale price
- $1,623.00
- Unit price
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Overview
Chasing a P0420 or P0430 on a 2015-2019 Mercedes-Benz GL450 / GLE400 3.0L? The catalyst has to satisfy the factory OBD-II monitors, not just fit. MagnaFlow's OEM Grade 21-551 is built for exactly that job and bolts in without cutting or welding. It is catalogued for the 2015-2016 Mercedes-Benz GL450 (4Matic), 2016-2017, 2019 Mercedes-Benz GLE400 (4Matic), 2017-2019 Mercedes-Benz GLE43 AMG (4Matic) and 2016 Mercedes-Benz GLE450 AMG (4Matic), plus 2 more models in the table below. This is the underbody converter position, so match it to the unit you are replacing. It ships at roughly 15 lb.
Features
- OEM Grade loading sized for the 3.0L OBD-II catalyst monitor
- Underbody position
- Fits 2015-2016 Mercedes-Benz GL450: 4Matic
- Fits 2016-2017, 2019 Mercedes-Benz GLE400: 4Matic
- Fits 2017-2019 Mercedes-Benz GLE43 AMG: 4Matic
- 3 further models listed in the fitment table
What is in the box
- Gaskets and mounting hardware for installation
Specs
| Part number | 21-551 |
| 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 | 15 lb |
Construction
- OEM Grade catalyst loading for engines with sensitive OBD-II efficiency monitoring
- Direct-fit layout: no cutting, welding or pipe stretching
- 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 (4Matic) | — | 2015-2016 | 3.0L |
| Mercedes-Benz | GLE400 (4Matic) | — | 2016-2017, 2019 | 3.0L |
| Mercedes-Benz | GLE43 AMG (4Matic) | — | 2017-2019 | 3.0L |
| Mercedes-Benz | GLE450 AMG (4Matic) | — | 2016 | 3.0L |
| Mercedes-Benz | GLS450 (4Matic) | — | 2017-2019 | 3.0L |
| Mercedes-Benz | ML400 | — | 2015 | 3.0L |
Fitment
| Year | Make | Model |
|---|---|---|
| 2015–2016 | Mercedes-Benz | GL450 |
| 2016–2017 | Mercedes-Benz | GLE400 |
| 2019–2019 | Mercedes-Benz | GLE400 |
| 2017–2019 | Mercedes-Benz | GLE43 AMG |
| 2016–2016 | Mercedes-Benz | GLE450 |
| 2017–2019 | Mercedes-Benz | GLS450 |
| 2015–2015 | Mercedes-Benz | ML400 |
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.
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