Parts for your 2020 Mazda 3-Timing belt kit

2020 Mazda 3 timing-belt-kit: not applicable — this model runs a timing chain

The 2020 Mazda 3 doesn’t use a timing-belt-kit. Mazda’s Skyactiv petrol engines fitted to the 2020 Mazda 3 (2.0L and 2.5L Skyactiv-G, and the 2.0L Skyactiv-X where available) are chain-driven, not belt-driven. This is confirmed by Mazda’s workshop literature for the BP-series Mazda 3, which specifies a chain-driven DOHC valvetrain, and by Mazda owner’s/service information that lists no timing belt replacement interval for these engines.

Because a timing belt isn’t used, a timing-belt-kit (belt, tensioner, idlers, and often a water pump) is simply not relevant to this vehicle. Timing chains operate inside the engine, lubricated by engine oil, and are designed as a long-life component. Mazda’s technical guidance does not include a scheduled replacement for the timing chain on the 2020 Mazda 3, instead, attention is placed on correct oil specification and service intervals to keep the chain, guides and hydraulic tensioner healthy.

Owners may occasionally see “timing-belt-kit” listings online for the Mazda 3, but those apply to older, belt-driven engines from other models or generations. For the BP-series 2020 Mazda 3, the correct approach is chain care rather than belt replacement.

• What this means for servicing: stick to regular oil and filter changes using the grade and specification recommended in the owner’s manual, clean oil is crucial for the chain tensioner and guides.
• What to watch for: unusual rattling at cold start, persistent chain noise, or fault codes related to cam/crank correlation can point to chain or tensioner issues. A technician can inspect further if symptoms appear.
• When replacement is needed: only if wear, stretch, or component damage is confirmed during diagnosis. There is no routine kilometre-based replacement interval.

For Australian and New Zealand owners, that’s good news: there’s no timing-belt-kit to budget for on the 2020 Mazda 3. Keeping up with scheduled servicing and the correct engine oil is the key to long, quiet chain life.

Popular questions about 2020 Mazda 3 timing-belt-kit

Does the 2020 Mazda 3 have a timing belt or a chain?
It has a timing chain. Mazda’s BP-series workshop documentation and service information specify a chain-driven cam system for the Skyactiv engines used in the 2020 Mazda 3, so a timing-belt-kit is not required.

Is there a timing chain replacement interval for the 2020 Mazda 3?
No scheduled interval. The chain is intended to last the life of the engine. Replacement is only considered if there are symptoms (noise, correlation faults) or confirmed wear/stretch during diagnosis. Regular servicing with the specified oil helps prevent issues.

What maintenance helps the timing chain last on a 2020 Mazda 3?
Use the oil grade and specification recommended in the owner’s manual, change oil and filter on time, and address any rattles or warning lights promptly. This keeps the hydraulic tensioner and guides working as designed.