Parts for your 2013 Mazda Premacy-Exhaust gasket

2013 Mazda Premacy exhaust gasket — purpose, fitment and servicing tips

Based on technical references, the 2013 Mazda Premacy (CW series, also known as Mazda 5) is fitted with exhaust gaskets. The Mazda Workshop Manual for the CW model (Exhaust System — Removal/Installation) specifies replacing exhaust gaskets whenever joints are disturbed, and the Mazda Electronic Parts Catalog (EPC) for the CW model lists multiple exhaust gaskets (cylinder head to manifold multi-layer steel gasket, manifold/front pipe and pipe-to-pipe crush-ring/flange gaskets). Major aftermarket catalogues also list Premacy/Mazda 5 exhaust manifold and pipe gaskets for 2010–2018 CW vehicles.

On this Premacy, exhaust gaskets do the unglamorous but crucial job of sealing the fiery end of the engine. They sit between the cylinder head and the exhaust manifold, and at key flange joints (like the front pipe and sections around the catalytic converter), stopping hot gases from leaking, keeping noise down, and ensuring the oxygen sensors read cleanly so the engine can fuel correctly. The manifold gasket is typically multi-layer steel to survive heat cycles, while the pipe joints often use a crush-ring (donut) that conforms to slight misalignment.

When an exhaust gasket starts to fail, the owner might notice a ticking or chuffing on cold start, a whiff of exhaust around the cabin, soot marks at a flange, or a raspy note under load. Left unchecked, leaks can skew O2 readings, hurt fuel economy, and trigger check engine lights. They can also let fumes creep into the cabin — not ideal for the school run or a long Kiwi or Aussie roadie.

Good servicing practice on a 2013 Premacy is to replace exhaust gaskets any time a joint is separated (for example, during clutch, gearbox, or exhaust work). Clean the mating faces, check flanges for warping, and use new spring bolts and hardware where Mazda specifies. Torque to the workshop manual, warm the car through a heat cycle, then recheck for any trace of leakage. A dab of high-temp anti-seize on studs (only where specified) will make the next job far less sweary.

Given coastal conditions across NZ and Australia, corrosion can hurry along gasket and hardware wear. It’s smart to inspect at regular services — look for soot trails, listen for ticks, and keep an eye on hanger rubbers that can stress the joints.

• Replace if there’s noise or smell, visible soot, after any exhaust section is removed, or if fault codes suggest exhaust leaks ahead of the catalyst.

Does a 2013 Mazda Premacy actually have exhaust gaskets?

Yes. Mazda’s CW-series Workshop Manual specifies gasket replacement during exhaust removal/installation, and the Mazda EPC lists manifold and pipe joint gaskets for the Premacy/Mazda 5. Aftermarket catalogues also carry dedicated gaskets for this model year.

How often should exhaust gaskets be replaced on a Premacy?

They’re not a routine “every X kilometres” item. Replace them whenever a joint is disturbed or if there are leak symptoms (noise, smell, soot, codes). Many last well past 150,000 km if untouched, but coastal vehicles may need attention sooner due to corrosion.

Is it safe to drive with a leaking exhaust gasket?

Best avoided. A leak can let fumes into the cabin, upset sensor readings, and get noisy enough to draw unwanted attention. It can also risk failing a WOF or RWC. Short trips to the workshop are usually fine, but sort it promptly.