How much does air-fuel ratio / front o2 sensor replace (upstream) cost in New Zealand?

Typically NZ$270–NZ$750 including GST at a NZ$120 an hour workshop rate (A$260–A$730 in Australia at A$140 an hour).

Air-fuel ratio / front O2 sensor replace (upstream): how much does it cost?

Typically NZ$270–NZ$750 in New Zealand and A$260–A$730 in Australia, including GST. Most cars.

	Parts (trade)	Labour	Sublet	Total incl GST
New Zealand	NZ$140–NZ$380	0.5–1.5 h	—	NZ$270–NZ$750
Australia	A$130–A$360	0.5–1.5 h	—	A$260–A$730

Totals use a standard workshop rate of NZ$120 or A$140 an hour and a 25% parts markup, plus GST. Your workshop's rate and parts prices will differ.

What affects the price

Wideband air-fuel sensors cost more than older narrowband ones. Seized sensors or ones on the rear bank of a V6 add time.

Other electrical repairs

12 V battery replace, standard flooded (small / medium car)NZ$190–NZ$330
12 V battery replace, standard flooded (SUV / ute / 4WD)NZ$290–NZ$500
12 V battery replace, EFB / AGM start-stop (Japanese / Korean)NZ$340–NZ$710
12 V AGM battery replace with battery registration / coding (European)NZ$440–NZ$830
Alternator replace (small / medium car, petrol)NZ$510–NZ$1,020
Alternator replace (SUV / ute / diesel)NZ$750–NZ$1,560
Alternator replace (European, smart charging)NZ$930–NZ$2,130
Starter motor replace (small / medium car)NZ$500–NZ$970
Starter motor replace (SUV / ute / European)NZ$780–NZ$1,850
A/C evacuate, vacuum test and regas (R134a, older cars)NZ$150–NZ$290

Researched by Credov in October 2026 from NZ and Australian parts suppliers and workshop price guides. Typical ranges, not quotes: ask a workshop for a quote before you rely on a price. All repair costs.