Second Hand Nissan Almera Catalytic Converter

Yes, all petrol-engined Nissan Almeras were fitted with a catalytic converter as standard, as required by emissions regulations from the models introduced in the 1990s onward. The Almera was sold in the UK across two main generations: the N15 (1995–2000) and the N16 (2000–2006). Both petrol variants carry a cat, so if your car is a petrol Almera you will genuinely need this part. The 2.2-litre diesel N16 variant uses a different exhaust treatment setup, so confirm with the breaker what your engine code and fuel type is before ordering.

The N15 and N16 are entirely separate generations with different bodyshells, engine mounting positions, and exhaust configurations, so a cat from an N15 is very unlikely to fit an N16 without significant modification. The key boundary here is the year 2000, when Nissan moved to the new platform. Even if both cars share a nominally similar engine displacement, the exhaust routing and flange positions are generation-specific. Always confirm the generation and engine code with the breaker before purchasing, as cross-generation interchange is strong confirm-with-breaker territory.

No, trim level does not affect catalytic converter fitment on the Nissan Almera — the cat is determined by the engine code and the year of manufacture, not whether your car is an S, SE, GX, or any other trim grade. You may find minor differences in heat shields or bracketry depending on the exact build, but the core catalytic unit is engine-driven, not trim-driven. Give the breaker your full registration and engine code rather than your trim name, and that will get you to the right part far more reliably.

Both years fall within the N16 generation (2000–2006), and if the engine codes match, there is a reasonable chance of compatibility, but catalytic converter interchange specifics are firmly in confirm-with-breaker territory. The engine code stamped on your block is the most important detail — a 2001 and 2003 1.8 should ideally share the same code for the cat to be interchangeable, but production changes can occur mid-generation. Provide your registration and engine code to the breaker and ask them to verify against the donor vehicle before you commit to buying.

No — petrol and diesel exhaust after-treatment systems are completely different and are not interchangeable. A petrol Almera uses a traditional three-way catalytic converter, while the diesel N16 2.2 uses different emissions components suited to diesel combustion chemistry. Fitting the wrong type would not only fail to work correctly but would almost certainly cause an MOT failure. Always confirm your fuel type and engine code with the breaker so they can source the correct unit for your car.

A used cat can pass an MOT provided it is in sufficiently good condition — MOT emissions tests check the efficiency of the catalytic converter, and a worn or internally damaged unit may fail even if it physically fits. The age and mileage of the donor car matter here, so ask the breaker about the condition and provenance of the part. Fitment must also be correct for your specific engine code and generation, as a visually similar cat from the wrong variant or era may not perform to the required standard. A reputable breaker should be able to advise on the condition of the unit they are supplying.