For a single oxygen sensor in an Infiniti G35, expect about $150–$350 at an independent shop, including parts and labor. Dealer-level replacement with OEM parts tends to be higher, typically $300–$550 per sensor.
Understanding the cost factors
Several variables influence the final bill: which sensor is failing (upstream or downstream), how many sensors are being replaced, whether you choose OEM or aftermarket parts, the local labor rate, and whether the work is done at a dealership or an independent shop. The Infiniti G35's VQ35DE engine uses four oxygen sensors—two upstream and two downstream—so multiple sensors may be involved if several codes or symptoms appear.
Parts choice: OEM vs aftermarket
OEM sensors (dealer-supplied) typically cost more but are designed to match exact specifications and may offer longer life. Aftermarket sensors are usually cheaper and widely available, often with comparable performance for everyday driving.
Typical installed price per sensor at an independent shop (including labor)
- Aftermarket oxygen sensor: roughly $100–$230 total per sensor.
- OEM/Dealer-grade oxygen sensor: roughly $180–$350 total per sensor.
Note: Prices vary by brand and retailer, and some shops may offer online pricing or discounts when replacing multiple sensors.
Shop type and regional differences
Where you have the work done and whether you replace one sensor or all four can dramatically affect the total cost. Dealerships typically charge more for parts and labor, while independent shops can offer mid-range pricing and potential discounts for multiple sensors.
- Independent shop: parts typically $60–$180 per sensor for aftermarket; $120–$260 per sensor for OEM; labor around 0.5–1.5 hours per sensor; total per sensor roughly $100–$230 (aftermarket) or $180–$350 (OEM).
- Dealership: OEM parts generally $150–$260 per sensor; labor about 0.6–1.5 hours; total per sensor commonly in the $250–$450 range, and higher if multiple sensors are replaced or if there are add-on codes.
As a practical note, replacing all four sensors at a single visit can provide cost savings on labor and parts, but you should confirm with the shop about any bundled pricing.
DIY considerations
For a confident DIYer with the right tools and safety precautions, replacing a single oxygen sensor can cut costs significantly, mainly by avoiding labor charges. Expect to pay the part price of the chosen sensor (roughly $60–$260 for aftermarket or $150–$260 for OEM) in addition to basic hand tools and any diagnostic checks you perform.
When multiple sensors are needed
If the check engine light indicates multiple sensor faults or you’re experiencing symptoms like rough idle, poor fuel economy, or failed emissions tests, you may be advised to replace more than one sensor. The Infiniti G35 uses four oxygen sensors, so full replacement costs can rise accordingly if several are failing at once.
Summary
Oxygen sensor replacement costs for the Infiniti G35 vary widely. Independent shops generally charge about $100–$350 per sensor installed (depending on aftermarket vs OEM parts), while dealer pricing typically runs higher at $250–$450 per sensor. Replacing all four sensors at once may reduce overall labor costs, but always get a detailed estimate that breaks out parts and labor. Budget for additional costs if a diagnostic or hardware access complications arise.