Catalytic Converter for Toyota Tacoma (1999-2000) 2.4L Rear

Direct-Fit Rear Catalytic Converter for 1999-2000 Toyota Tacoma

What it Does: The Direct-Fit Rear Catalytic Converter replaces the degraded or clogged downstream emissions brick on the 1999-2000 Tacoma 2.4L to eliminate P0420 fault codes, normalize exhaust backpressure, and ensure tailpipe emissions compliance.

The Stock Toyota Tacoma Catalytic Degradation Problem

Over extended mileage and severe duty cycles, the original secondary catalytic converter on the RZN140/RZN150 chassis experiences internal substrate breakdown. Prolonged exposure to unburned hydrocarbons, oil blow-by, and severe heat cycles degrades the factory precious metal washcoat and compromises the ceramic honeycombs. This thermal stress causes internal cracking, cell sintering, and eventual exhaust choking. In the naturally aspirated 2RZ-FE engine, excessive downstream backpressure induces pumping losses, compromises scavenging dynamics, drops fuel efficiency, and illuminates persistent catalyst system efficiency trouble codes.

The Engineering Solution

Constructed as a bolt-on assembly, this direct-fit rear converter restores factory exhaust velocity without requiring cutting or custom welding. The core utilizes a high-surface-area ceramic substrate loaded with an engineered washcoat to rapidly oxidize carbon monoxide (CO) and hydrocarbons (HC) while reducing nitrogen oxides (NOx). Housed inside a heavy-gauge, corrosion-resistant steel outer shell, the unit features precision-welded, OE-spec mounting flanges and integrated bracketry aligned with factory isolation hangers. This rigid architecture resists vibration-induced fatigue during heavy hauling while maintaining OEM backpressure levels across the entire operating RPM range.

Technical Specifications

Compatibility

• 1999 Toyota Tacoma Base 2.4L L4 - Rear Position
• 1999 Toyota Tacoma DLX 2.4L L4 - Rear Position
• 2000 Toyota Tacoma Base 2.4L L4 - Rear Position
• 2000 Toyota Tacoma DLX 2.4L L4 - Rear Position

Frequently Asked Questions

Does this fit the RZN140/RZN150 Tacoma?
Yes, this is a direct fit for the 1999-2000 Toyota Tacoma equipped with the 2.4L 2RZ-FE engine in the downstream rear position.

Will this clear a catalyst efficiency DTC such as P0420?
Yes, replacing a degraded rear converter with this high-efficiency ceramic core assembly restores emissions conversion to OEM thresholds when upstream sensors and engine fueling are operating correctly.

The Toyota Truck Endurance Standard

Engineered to handle sustained daily work loads, high thermal cycles, and severe chassis vibration, this rear converter assembly restores the reliability, clean burn, and unhindered power delivery demanded by first-generation Tacoma workhorses.