Citroen C3 Aircross Y-Pipe

Listen for popping or ticking right at the Y-joint, worst under acceleration, and expect power to fall away at high RPM alongside vibration coming up through the floor. Fumes finding their way into the cabin are the serious symptom. On a lift the crack usually announces itself with a sooty trail or carbon deposits.

SA exhaust shops in our supplier network fabricate and fit Y-pipes — cost depends on material and whether it's an OEM-style or custom unit. Request a free quote through our form with your Citroen model for an accurate fitted price.

For a short trip, yes; for any length of time, no. The leak puts exhaust fumes into the cabin, which is a carbon monoxide risk, and it also skews the oxygen sensor into reading lean, and that lean condition goes on to damage valves. A patch weld is usually same-day work, so book it inside a week.

It will. Air drawn in through the leak reaches the oxygen sensor before the ECU can tell where it came from, the mixture reads lean, and the ECU answers by adding fuel — 10 to 20 percent off your economy is typical. Seal the leak and it comes back as soon as the ECU adapts.

Small cracks and flange leaks are usually weldable — any competent exhaust shop handles them. Widely rusted or thin-walled pipe needs a section or full Y replaced. A good fitter inspects with a mirror and light before quoting weld vs replacement.