Catalytic Converter for BMW 228i 428i (2014-2016) 2.0L Front

Direct-Fit Front Catalytic Converter for 2014-2016 BMW 2 Series & 4 Series (F22/F32)

What it Does: The Direct-Fit Front Catalytic Converter replaces degraded factory emissions units on the 2014-2016 BMW 228i and 428i to restore factory exhaust scavenging, eliminate catalytic-efficiency trouble codes, and ensure reliable OBD-II emissions compliance.

The Stock BMW 2 Series & 4 Series Catalyst Degradation

Mounted directly downstream of the twin-scroll turbocharger turbine, the factory catalytic converter on the N20B20A engine endures severe thermal stress and continuous exhaust gas pulsation. Over time, high exhaust temperatures and minor oil blow-by degrade the internal precious-metal washcoat, causing catalytic sintering, restricted ceramic cells, elevated exhaust backpressure, and persistent P0420 diagnostic trouble codes.

The Engineering Solution

Constructed with a heavy-gauge stainless steel outer shell and robust tubular casing, this front catalytic assembly features a high-grade ceramic honeycomb substrate engineered to survive extreme exhaust gas temperatures. The internal core is washed in an optimized precious-metal catalytic loading that guarantees proper hydrocarbon and carbon monoxide oxidation without causing backpressure spikes. Integrated pre- and post-catalyst sensor ports and precision-machined flanges match OEM part numbers 18307607665 and 18327645666, ensuring a bolt-on seal directly against the turbo turbine discharge and mid-pipe without cutting or welding.

What's Included

• 1 × Direct-Fit Front Catalytic Converter
• 1 × Installation Accessory Hardware Set

Technical Specifications

Compatibility

• 2014-2016 BMW 228i Coupe & Convertible (F22 / F23) 2.0L L4
• 2014-2016 BMW 228i xDrive Coupe & Convertible (F22 / F23) 2.0L L4
• 2014-2016 BMW 428i Coupe, Convertible & Gran Coupe (F32 / F33 / F36) 2.0L L4
• 2014-2016 BMW 428i xDrive Coupe, Convertible & Gran Coupe (F32 / F33 / F36) 2.0L L4
• Mounting Location: Front (Downpipe / Primary Location)

Frequently Asked Questions & Fitment Warnings

Does this fit the F22 and F32 2 Series and 4 Series?

Yes, this is a direct fit for the 2014-2016 BMW 2 Series and 4 Series equipped with the N20B20A engine. Restricted emissions part: EPA 46-state legal only; cannot ship to or be installed in California, New York, Colorado, or Maine. Does not fit 6-cylinder N55/B58 models or later B48 modular engines.

Is custom ECU tuning required after installing this replacement converter?

No tuning is required; the ceramic washcoat and bung geometry match factory parameters to operate cleanly within standard DME OBD-II fuel-trim limits.

The BMW Precision Caliber

BMW turbocharged powertrains require exact exhaust flow parameters to maintain boost control and sensor calibration; this converter matches factory backpressure thresholds to prevent catalyst codes and keep your European sports car operating without hesitation.