Peugeot 408 Exhaust System Replacement Parts

The Peugeot 408 was sold in the UK across two distinct generations: the first generation ran from 2010 to 2014, and the second generation launched in 2023 as a fully redesigned model on a new platform. These two generations share no meaningful mechanical relationship, so exhaust parts are completely separate between them and you must specify which generation you have when contacting a breaker.

Both fall within the first-generation 408 (2010–2014), but you need to match the engine code precisely, as Peugeot used different four-cylinder petrol and diesel units across that production run and exhaust routing and dimensions can differ between them. Emissions regulations also tightened during this period, and a system from an earlier car may not carry the correct DPF configuration for a later Euro 5 registered vehicle. Name your exact engine code and registration when approaching a breaker, and confirm the part number matches before purchasing.

Trim level does not affect exhaust fitment on the Peugeot 408; Active, Allure, and any other first-generation trim grades all used the same exhaust systems tied to their engine and emissions specification rather than their equipment level. What you may notice when buying from a breaker is that the tailpipe finisher or trim surround differs cosmetically between specs, but the functional exhaust components themselves are shared. Always match on engine code and fuel type, not on trim name.

Yes, DPF compatibility is an important consideration because fitting a system without a functioning DPF to a car that requires one is an MOT failure and illegal for road use in the UK. Whether a specific used DPF-back or cat-DPF section from another 408 will interchange correctly with your car is something you must confirm with the breaker against your exact registration and engine code, as the specifics of DPF fitment and catalytic converter interchange are not straightforward to state as a blanket rule.

No — petrol and diesel exhaust systems are not interchangeable on the Peugeot 408. Diesel systems are built around the DPF and have different pipe diameters, mounting points, and overall length compared to their petrol equivalents, so a petrol system will not fit a diesel car and would not pass MOT even if it could be adapted. Always specify your fuel type alongside your engine code when requesting a quote from a breaker.

The second-generation 408, launched in 2023, is built on Stellantis's EMP2 platform and shares architecture with other group models, which raises the possibility of cross-model parts compatibility. However, whether a specific exhaust section from a related model will physically and legally fit your 408 is not something that can be confirmed here as fact. Raise this possibility directly with the breaker, giving them your registration and engine code, and let them verify part numbers before you commit to a purchase.