Parts for your 2002 Daihatsu Gran move-Oxygen sensor

2002 Daihatsu Gran Move oxygen sensor — what it does and when to replace it

Yes, the 2002 Daihatsu Gran Move does use an oxygen sensor. Technical sources that confirm fitment include the Daihatsu electronic parts catalogue (G30# Gran Move/Pyzar listings) showing a heated oxygen sensor (HO2S) in the exhaust manifold for the 1.6 HD-E and 1.5 HC-EJ engines, the factory service manual procedures covering lambda feedback and sensor diagnostics, and aftermarket catalogues from Denso and NGK/NTK that list direct-fit HO2S units for the 2002 Gran Move/Pyzar. Depending on market and emissions spec, there may be only an upstream sensor, or an additional downstream sensor after the catalytic converter.

On the 2002 Gran Move, the oxygen sensor measures how much oxygen is left in the exhaust so the ECU can fine‑tune the air–fuel mix. That keeps fuel economy tidy, reduces emissions, and protects the catalytic converter from damage. It’s a heated, four‑wire sensor designed to come up to temperature quickly so closed‑loop control kicks in not long after start‑up, even on a chilly Kiwi morning.

There’s no strict replacement interval, but by 150,000–200,000 km many original sensors slow down. If fuel use creeps up, the engine feels doughy, or the check engine light flashes a lambda or mixture code, the sensor’s a prime suspect. A quality direct‑fit unit (Denso/NTK) is the way to go, avoid universal splice‑in types unless you’re comfortable soldering and heat‑shrinking looms properly.

Good servicing habits for the Gran Move’s oxygen sensor:

• Fix exhaust leaks ahead of the sensor — false air will trick the ECU.
• Avoid silicone sealants and leaded fuel additives — they contaminate the sensing element.
• Check the harness and connector for heat damage or brittle insulation.
• If removing, work on a warm (not hot) exhaust, use a proper O2 socket, and refit to the torque in the service manual, many sensors come pre‑coated with anti‑seize, so don’t add more.

Professional diagnosis with live data helps: a healthy upstream sensor should switch rapidly, a lazy, flat, or stuck reading points to replacement. For Aussie and NZ workshops, expect roughly 0.5–1.0 hours labour, plus the sensor. Keeping this little part happy pays off with smoother running, fewer emissions, and better fuel spend for any 2002 Daihatsu Gran Move still doing daily duties.

FAQs

How many oxygen sensors does a 2002 Daihatsu Gran Move have?
Most markets got one upstream heated oxygen sensor in the exhaust manifold. Some later or stricter‑emissions versions added a second sensor after the catalytic converter. A quick look under the car or a check of the VIN in a parts catalogue will confirm the exact setup.

What are the signs the oxygen sensor needs replacing?
Higher fuel consumption, rough idle, hesitations, and a check engine light with mixture or oxygen sensor codes are common. If scan data shows the upstream sensor switching slowly or staying fixed rich/lean despite changes, it’s likely on the way out.

What does replacement typically cost in Australia or New Zealand?
For a quality direct‑fit sensor, budget roughly AUD/NZD $120–$300 for the part and 0.5–1.0 hours labour. Seized sensors or corroded exhausts can add time. Using reputable brands helps avoid drivability dramas.