BMW 1 Series Catalytic Converter

The catalytic converter in BMW 1 Series models (such as E87, E81) is an essential exhaust system component that reduces harmful engine gases like CO, HC, and NOx by chemically converting them into less polluting gases. It contains a honeycomb structure coated with precious metals like platinum that catalyze these reactions, helping reduce vehicle emissions effectively.

The main function of the catalytic converter is to reduce vehicle emissions by forcing exhaust gases through a cellular honeycomb coated with catalysts. Internally, it includes a fibrous insulating layer and a honeycomb monolith treated with platinum metals to activate chemical reactions. The system is monitored by two oxygen sensors (upstream and downstream) to ensure efficiency and optimal emissions control.

Frequent OBD error codes like P0420 and P0430 indicate catalytic converter malfunction or faulty O2 sensors. Symptoms may include the check engine light, loss of engine performance, and rattling noises from the exhaust flex pipe. Common causes include a clogged or worn catalytic converter, defective oxygen sensors, damaged flexi pipe, or NOx-related emissions issues, especially on models like the 118i E81 N43.

• Clogged or worn converter: Stops cleaning gases, triggering error codes (common after 100,000 km).
• Defective O2 sensor: Causes incorrect sensor readings, affecting emissions.
• Damaged flexi pipe: Produces rattling noise and potential exhaust leaks.
• NOx sensor problems: Affects emission tests and vehicle compliance.

If ignored, these issues can lead to long-term engine and exhaust damage and failed emission tests.

DIY replacement is possible but requires specific tools and careful steps. Key tools include 15mm wrenches, ratchets, torque wrenches, and removing components like the engine cover, O2 sensors, heat shields, and downpipe bolts. The procedure generally involves disconnecting the battery and sensors, lifting the car, removing the exhaust downpipe, and installing the new converter carefully with proper torque. Always test for rattles and clear engine codes after installation.

• Disconnect battery and rear O2 sensor.
• Lift car, remove sump guard and heat shield.
• Remove downpipe bolts and exhaust nuts carefully.
• Install new OEM or aftermarket catalytic converter, grease bolts, torque correctly.
• Reconnect sensors and test for smooth operation.

Video tutorials and manuals are available for detailed guidance. Consider professional help if unsure.

OEM catalytic converters can be costly, often around €1000 or more. It is recommended to check O2 sensor performance before replacement to avoid unnecessary costs. At Krosfou, all catalytic converters come with a 3-year warranty limited to 100,000 km of use, ensuring quality and reliability. Warranty conditions include professional installation, replacement of related sensors, and proper vehicle maintenance.

• 3-year warranty covering defects and performance.
• Warranty limited to 100,000 km usage.
• Warranty requires professional installation and adherence to manufacturer instructions.

The warranty includes repair at the factory and does not cover damages caused by neglect or improper use.

Krosfou offers brand-new, stainless steel catalytic converters for the BMW 1 Series, manufactured in Europe with TÜV SÜD certification. These catalytic converters use advanced honeycomb technology with rare metal coatings that ensure excellent emissions reduction and durability. Orders are shipped directly from the factory with several delivery options available across Europe and worldwide.

• 100% European manufacturing in Poland.
• High-performance INOX 409 stainless steel construction.
• Certified to meet or exceed emission standards.
• Fast delivery: Standard 1-6 working days in Europe, express options available.

Free return within 30 days applies for unused items in original condition.

Krosfou provides multiple delivery options including free standard delivery on orders over €157.50 within Europe and express delivery available with reputable carriers like DHL and UPS. International deliveries are also supported with standard and express services. Customers benefit from online tracking and professional packaging.

• Standard delivery in Europe: 1 to 6 working days, free above €157.50 excl. VAT.
• Express delivery: 24 to 48 hours depending on carrier and location.
• International delivery options with 3-15 working days standard and 2-4 days express.
• Free returns within 30 days for unused, original condition products.

Return requests are submitted via customer account or email, with prepaid labels provided for European returns.

Catalytic converters are valuable because they contain precious metals such as platinum, palladium, and rhodium, which catalyze chemical reactions that significantly reduce harmful exhaust emissions from vehicles. By converting toxic gases, they protect the environment and ensure vehicles comply with emission regulations. Their specific design and technology also contribute to the proper running and performance of the engine.

• Reduce emissions of CO, HC, and NOx gases.
• Ensure compliance with strict environmental and vehicle regulations.
• Contain precious metals that enable catalytic chemical reactions.
• Help maintain vehicle fuel efficiency and performance.

Proper maintenance and timely replacement of the catalytic converter and associated sensors ensure the vehicle runs cleanly and efficiently, benefiting both the environment and the driver.