Catalytic Converter for Lincoln Navigator (2015-2017) 3.5L Left & Right

Direct-Fit Left & Right Catalytic Converter Set for 2015-2017 Lincoln Navigator (U326)

What it Does: The Direct-Fit Catalytic Converter Set replaces worn factory converters on the 2015-2017 Navigator to eliminate P0420/P0430 diagnostic trouble codes, stabilize turbine backpressure, and restore proper exhaust scavenging.

The Stock Lincoln Navigator Substrate Degradation

Under heavy towing duty, the twin-turbocharged 3.5L EcoBoost platform subjects the OEM catalytic converters to extreme thermal cycling and high exhaust gas velocities. Over time, heat soak and oil vapor contamination degrade the factory ceramic washcoat, leading to substrate fracturing, soot clogging, or core meltdown. This restriction spikes exhaust backpressure before the turbochargers, elevating cylinder head temperatures and triggering persistent catalyst efficiency fault codes.

The Engineering Solution

Engineered as a direct OE bolt-on replacement, this left-and-right assembly features thick-gauge stainless steel tubing and heavy-duty converter bodies built to resist corrosive condensates and thermal fatigue. Inside, a durable ceramic honeycomb substrate delivers high cell density paired with an optimized precious metal washcoat to effectively oxidize hydrocarbons and carbon monoxide while reducing NOx emissions. CNC-machined mounting flanges and integrated factory-located oxygen sensor bungs mate directly to OEM downpipes and cat-back piping, ensuring leak-free sealing under high exhaust pulses.

Technical Specifications

Compatibility

• 2015 Lincoln Navigator 3.5L EcoBoost Turbo V6 (Standard & L Models)
• 2016 Lincoln Navigator 3.5L EcoBoost Turbo V6 (Select, Reserve, & L Models)
• 2017 Lincoln Navigator 3.5L EcoBoost Turbo V6 (Select, Reserve, & L Models)

Frequently Asked Questions

Does this fit the U326 Navigator?

Yes, this is a direct fit for the 2015-2017 Lincoln Navigator equipped with the 3.5L EcoBoost engine.

Will this converter set resolve downstream catalyst efficiency codes (P0420 / P0430)?

Yes, the fresh catalytic washcoat restores proper emissions reduction thresholds to clear check engine lights caused by degraded factory substrates.

The Lincoln Heavy-Duty Caliber

Full-size platforms demand uncompromised reliability under high load and continuous towing; this heavy-gauge stainless converter assembly maintains structural integrity against extreme exhaust gas temperatures and chassis flex.