Parts for your 2022 Mazda Cx-5-Oxygen sensor

2022 Mazda CX-5 Oxygen Sensor

Yes, the 2022 Mazda CX-5 is fitted with oxygen sensors. Technical references that confirm this include the Mazda Workshop Manual for Skyactiv-G engines (which specifies an upstream air–fuel ratio sensor and a downstream heated oxygen sensor), the Mazda Electronic Parts Catalogue listing Bank 1 Sensor 1 and Bank 1 Sensor 2, and OBD/ADR requirements (ADR 79/04 aligned with Euro 5/6) that mandate closed-loop fuel control and catalyst monitoring using oxygen sensors. Mazda diagnostic documentation for common DTCs (such as P0131, P0134, P0138, P015A, P0420 and A/F sensor circuit codes) also points straight to these sensors being part of the 2022 CX-5 petrol emissions system. Diesel variants use lambda sensing as part of their emissions strategy as well.

On the CX-5, the upstream sensor (often a wideband air–fuel ratio sensor) continuously measures oxygen in the exhaust so the ECU can fine-tune fuelling for smooth running, good economy and low emissions. The downstream sensor sits after the catalytic converter to monitor catalyst efficiency. Together they help protect the cat, reduce fuel use and keep performance crisp on Aussie and Kiwi roads.

They’re not a routine “every service” replacement item, but they do wear over time. Many last well beyond 150,000–200,000 kilometres. Replace or test them if there’s a check engine light, poor economy, rough idle, failed emissions readiness, or a sulphur smell from the exhaust. When fitting, use the correct sensor type (upstream A/F vs downstream HO2S), avoid touching the sensing tip, route the harness like factory, and tighten to spec from the Mazda workshop manual. Genuine or high-quality OEM-equivalent sensors (Denso/NTK) are recommended.

• Typical signs it’s crook:
  • Check engine light with O2/A/F or catalyst codes
  • Higher fuel consumption or sluggish acceleration
  • Rough running, exhaust odour, or failed inspection readiness

• Good servicing habits:
  • Fix vacuum or exhaust leaks quickly
  • Keep ignition and injectors healthy to prevent rich misfire damage
  • Use quality petrol and avoid silicone sprays near the intake
  • Check sensor live data and heater operation during diagnostics, not guesswork

Handled properly, a fresh oxygen sensor can restore crisp throttle response, bring fuel trims back in line, and keep that catalytic converter happy for the long haul.

FAQs

How many oxygen sensors does a 2022 Mazda CX-5 have?
Most 4‑cylinder petrol CX‑5 models have two: one upstream wideband air–fuel ratio sensor (Bank 1 Sensor 1) and one downstream heated oxygen sensor (Bank 1 Sensor 2) after the catalytic converter. Turbo petrol models follow the same layout. Market-specific diesel variants use lambda sensing and additional emissions sensors, but the exact count varies by spec.

When should the oxygen sensor be replaced?
There’s no fixed interval in the maintenance schedule. Many last 150,000–200,000 km or more. Replace when there are relevant fault codes, slow sensor response on live data, poor economy, or catalyst efficiency issues. Use the correct sensor for the position, and don’t contaminate the tip with anti‑seize unless the manufacturer specifies it (most quality sensors arrive pre-coated at the threads).

Can you drive with a faulty oxygen sensor?
You can usually limp to a workshop, but it’s not ideal. A failed sensor can force open‑loop fuelling, which means higher fuel use, rough running and potential catalyst damage if left too long. Best to get it scanned and sorted promptly.