410mm Auto Oxygen Sensor Car Parts For Peugeot Citroen Fiat Lancia Changfeng Geely 0258006028

Technical Notes:

• This is a 4-wire heated zirconium oxide oxygen sensor. The four wires serve two independent circuits — two for the internal heater (power and ground) and two for the sensor signal and signal ground.

• The built‑in heating element brings the ceramic sensing tip up to operating temperature quickly after a cold start, enabling the ECU to enter closed‑loop fuel control sooner and significantly reduce cold‑start emissions.

• The sensor is constructed with a stainless‑steel shell that resists rusting and provides greater durability under harsh exhaust environment conditions. The centre ceramic element is composed of Zirconium Oxide, Alumina and Yttrium Oxide. The platinum coating is applied using vapour deposition, and a spinel coating on the outer layer prevents solid particles in the exhaust gas from damaging the component.

• Under rich (excess fuel) conditions, the sensor outputs approximately 0.6 – 1.0 V. Under lean (excess oxygen) conditions, the output falls to near 0 V. The ECU uses this feedback to continuously adjust fuel delivery for optimal combustion efficiency.

• This sensor can serve as either an upstream (pre‑catalyst) regulating probe or a downstream (post‑catalyst) diagnostic probe, depending on the specific vehicle application.

• As a direct‑fit sensor, it features a vehicle‑specific electrical connector and pre‑terminated wiring, eliminating the need for cutting or splicing during installation. The threads are factory pre‑greased with anti‑seize compound to prevent seizing in the exhaust bung and to facilitate easier future removal.

• All sensors are 100% tested to meet or exceed original equipment quality standards and conform to ECE regulations and ISO quality standards.

Specification data compiled from Triple A Trading Dubai, Parts in Motion, TTnet, and product listing data.

This Lambda Sensor is manufactured to original equipment (OE) standards and is directly interchangeable with the following original equipment manufacturer (OEM) part numbers. Always verify physical fitment (connector shape, cable length and thread size) with your original part before purchasing.

Important Cross-Reference Notes:

• The primary OE references for PSA Group vehicles are 1628CW, 1628HR, 1618Z7, 161848, and 96229997.

• For Fiat and Lancia applications, the primary OE references are 9622997680 and 9635978280.

• The number 96359782 (without the trailing "80") also appears as an alternative reference for Fiat applications.

• For Chinese domestic market vehicles (Changfeng, Changhe, Geely, Great Wall, JAC), the OE reference 3609700UE07 is the primary interchange number.

Cross‑reference data compiled from Triple A Trading Dubai, Parts in Motion, and 17vin.com catalogues. Interchange numbers are provided as a guide — physical verification is always required before purchase.

This Lambda Sensor is an original equipment component for a wide range of PSA Group (Peugeot‑Citroën), Fiat Group (Fiat, Lancia), and Chinese domestic market vehicles. Based on extensive cross‑reference data, the sensor is used on 4‑cylinder petrol engines ranging from 1.0L to 2.0L. The fitment position (upstream vs. downstream) depends on the specific vehicle platform and emissions standard.

⚠️ Important Fitment Note: This sensor may be used as an upstream (pre‑catalyst) regulating probe or a downstream (post‑catalyst) diagnostic probe, depending on the vehicle. You must verify the position of your old sensor (before or after the catalytic converter) before ordering. Upstream and downstream O₂ sensors are not interchangeable on most vehicles unless your original sensor was in that location.

Fitment Notes:

• Engine codes confirmed compatible: KFX (TU3JP, 1.4L, Peugeot/Citroën), NFZ (1.6L, Peugeot/Citroën), TU3, TU5, EW7, EW10 series engines.

• Pre‑2003 PSA vehicles: For Peugeot and Citroën vehicles manufactured prior to 2003, this sensor is commonly used as an upstream (pre‑catalyst) regulating probe, installed in the exhaust manifold. These vehicles typically have two lambda sensors (pre‑cat and post‑cat) — this part may fit either position depending on the specific model.

• Late‑model PSA vehicles: For vehicles manufactured between 2003 and 2010, this sensor may be used as a downstream (post‑catalyst) diagnostic probe. Always verify with your original sensor.

• Zotye / Jiangnan TT: This specific application uses the sensor in the upstream (front) position.

• Number of sensors: Most 4‑cylinder vehicles listed above have two oxygen sensors: one upstream (regulating) and one downstream (diagnostic). This sensor may be used for either position depending on the original equipment configuration.

• How to verify: Locate your vehicle‘s catalytic converter. The upstream sensor is typically installed in the exhaust manifold or in the pipe immediately before the catalytic converter. The downstream sensor is installed after the converter. Verify the position of your old sensor before ordering.

• Not compatible with diesel engines — diesel O₂ sensors (where fitted) use wideband (LSU) technology with different calibration parameters and part numbers.

• The vehicle fitment information above is a guide only. Always confirm compatibility using your vehicle‘s VIN or by physically inspecting your old sensor‘s position, connector shape, and cable length before ordering.

A faulty lambda sensor directly affects the ECU’s ability to accurately monitor the air‑fuel mixture. While the engine may still run, fuel economy, emissions and OBD‑II readiness are all negatively affected. Replace your lambda sensor immediately if you experience any of the following symptoms.

Potential Causes of Sensor Failure:

• Normal wear and tear — Lambda sensors typically degrade after 100,000 – 160,000 km (60,000 – 100,000 miles) of operation due to continuous exposure to high‑temperature exhaust gases (up to 930 °C) and thermal cycling stress. The recommended replacement interval for this sensor is 160,000 km.

• Heater circuit failure — The internal heating element opens or shorts. This causes the sensor to respond extremely slowly or not at all when cold, triggering P0030‑P0037 codes and affecting cold‑start performance. Documented as a P2237 open circuit fault.

• Contamination (“sensor poisoning”) — Oil, coolant (head‑gasket leaks), silicone‑based sealants, or the use of leaded fuel permanently coats the ceramic sensing tip, destroying its ability to detect oxygen. This is referred to in Chinese technical literature as "氧传感器中毒" (oxygen sensor poisoning).

• Physical impact damage — Dropping the sensor (even from a low height) or impact from road debris can crack the fragile ceramic element, rendering the sensor inoperative.

• Wiring / connector issues — Damaged wiring, loose connections, corrosion at the connector, or an intermittent open / short circuit can trigger fault codes even when the sensor itself is healthy.

• Exhaust leaks upstream of the sensor — False oxygen readings from an upstream exhaust leak (cracked manifold, failed gasket, etc.) will cause erratic sensor output and may be incorrectly attributed to a faulty sensor.

• Engine mechanical issues — Worn piston rings or valve seals can cause oil contamination of the sensor. As noted in technical discussions,  (oil burning is related... sensor poisoning means it fails again after replacement). If your engine burns oil, the new sensor may also fail prematurely.

Diagnostic Tips:

• A failing lambda sensor frequently triggers the MIL without any noticeable drivability change initially. Fuel consumption, however, is still negatively affected. Proactive replacement at the recommended interval (160,000 km) can restore up to 15% of lost fuel efficiency.

• P0133 (O₂ Sensor Circuit Slow Response) is a common code for this type of sensor, indicating that the sensor‘s switching speed has fallen below the acceptable threshold. This affects the ECU‘s ability to maintain precise air‑fuel control.

• P2237 specifically indicates a load resistance fault (open circuit) in the upstream oxygen sensor circuit.

• To diagnose a faulty sensor:

  • Heater circuit test: Use a digital multimeter to measure the resistance across the two heater circuit pins. A healthy sensor should read within the expected specification (< 9.6 Ω ± 1.5 Ω). An open circuit (infinite resistance) or short circuit (0 Ω) indicates heater failure.

  • Sensor signal test: Use an OBD‑II scanner or oscilloscope to monitor the sensor voltage output under steady‑state driving. A healthy narrow‑band sensor fluctuates continuously between approximately 0.1 V – 0.9 V (typically oscillating several times per second). The minimum output should be ≤ 50 mV, and the maximum ≥ 900 mV. If the voltage remains steady (stuck high, stuck low, or at a fixed mid‑range value), does not fluctuate, or changes very slowly, the sensor is failing.

• P0420 can be caused by a failing downstream oxygen sensor, a failing catalytic converter, or an upstream sensor that is no longer providing accurate readings. If both P0133 and P0420 appear together, the upstream sensor is likely the root cause.

• Always investigate the root cause before replacing the sensor — if contamination caused the failure (e.g., oil burning, coolant leak, silicone exposure), replacing the sensor without addressing the underlying issue will result in repeated premature failure. As noted:(sensor poisoning means it fails again after replacement).

Fault code information based on OBD‑II standardised diagnostic trouble code definitions and automotive diagnostic resources. Symptom information compiled from product listings, owner reports, and Chinese technical forums.

1. Confirm Fitment — Physical Inspection is Essential

• This is a direct‑fit sensor with a 4‑pin connector (application‑specific), M18 × 1.5 thread, and 410 mm overall length. The cable length may vary depending on the aftermarket manufacturer — documented lengths include 380 mm, 410 mm, 570 mm, and 600 mm.

• ⚠️ Do not purchase based solely on the OE number. Aftermarket equivalents may have slight differences in cable length, connector shape, or calibration parameters. If the connector does not match, do not install.

• Physically compare your original sensor‘s connector shape (4‑pin), pin count, cable length, and thread size (M18 × 1.5) before ordering.

• Measure the cable length of your original sensor. A significant mismatch (e.g., a 600 mm sensor when you need 380 mm) may cause routing difficulties or the connector failing to reach the harness.

2. Verify Sensor Position — Upstream vs. Downstream

• This sensor may be used as either an upstream (pre‑catalyst) regulating probe or a downstream (post‑catalyst) diagnostic probe, depending on the specific vehicle application. Upstream and downstream sensors are not interchangeable on most vehicles — using a sensor in the wrong position will result in improper ECU readings, persistent fault codes, and the ECU may not be able to correctly monitor catalyst efficiency.

• How to verify: Locate your vehicle‘s catalytic converter. The upstream sensor is typically installed in the exhaust manifold or in the pipe immediately before the catalytic converter. The downstream sensor is installed after the converter. If your faulty sensor is located before the converter, this sensor may be suitable; if located after the converter, confirm that your original part number matches the cross‑references above.

• For PSA Group vehicles pre‑2003, this sensor is typically used as an upstream (pre‑catalyst) regulating probe.

• For Zotye / Jiangnan TT, this sensor is used in the upstream (front) position.

• For vehicles with two oxygen sensors (upstream and downstream), the downstream sensor generally uses a different part number on many platforms. Ensure you are replacing the correct sensor.

3. Universal Alternative Part Number

• This direct‑fit sensor is also available as a universal (splice‑in) sensor under article number 0 258 986 615. The universal alternative is intended for applications where the original connector has been cut off or where a direct‑fit sensor is not available. If you require a universal sensor, note that cutting and splicing will be required — this is only recommended for experienced installers.

4. Replacement Interval

• Lambda sensors degrade gradually over time, often without triggering immediate fault codes. Their switching response becomes slower and their voltage range narrows with age and mileage.

• Proactive replacement at 160,000 km (approx. 100,000 miles) is recommended to maintain optimal fuel efficiency, catalytic converter health, proper emissions output, and correct OBD‑II monitor readiness.

• Even if no Check Engine Light is present, an aged sensor will still respond more slowly than a new one, negatively affecting fuel economy and emissions. Proactive replacement can save up to 15% on fuel consumption.

5. Installation Tips

Before Installation:

• Allow the exhaust system to cool completely before removal — the exhaust manifold and catalytic converter remain dangerously hot for up to 30 minutes after engine shutdown. Attempting removal on a hot system risks severe burns.

• Disconnect the vehicle‘s battery negative (-) cable before starting work to prevent electrical issues, potential ECU damage, or accidental short circuits.

• Use a high‑quality O₂ sensor socket (22 mm / 7/8″) with an offset design to prevent stripping the sensor‘s flats and to provide better access in confined engine bays. A standard deep socket can easily damage the sensor housing or its flats.

Removal of the Old Sensor:

• Apply penetrating oil (e.g., WD‑40) to the threads of the old sensor the night before removal. This can significantly ease extraction, especially if the sensor has been installed for many years in the harsh exhaust environment.

• If the sensor is difficult to remove when cold, it may be easier when the exhaust is warm (run the engine for 1‑2 minutes, then allow it to cool until it is warm but not scalding). Exercise extreme caution to avoid burns — wear heavy‑duty heat‑resistant work gloves.

• Do not use excessive force — damage to the exhaust bung threads can result in expensive repairs, potentially requiring exhaust manifold replacement or thread repair (helicoil / timesert).

• Disconnect the electrical connector carefully — press the locking tab and pull only the connector housing (never pull directly on the wires). Follow the sensor wires to locate the connector, which is typically secured to a bracket on the engine block or valve cover.

• Inspect the old sensor‘s connector, cable, and tip for signs of contamination (oil, soot, coolant residue), melting, or cracking. Note any contamination — this indicates an underlying engine issue that must be addressed before installing the new sensor to prevent repeat failure.

Installation of the New Sensor:

• Do not apply additional anti‑seize compound unless the new sensor‘s threads are completely dry. Many OE‑quality sensors are factory‑coated with anti‑seize. Adding extra can contaminate the sensor tip and cause premature failure. If the threads appear dry and no pre‑grease is evident, apply a small amount of sensor‑safe anti‑seize compound to the threads only — never to the sensor tip.

• Do not use silicone sealants anywhere near the exhaust system — silicone vapour will permanently contaminate and destroy the oxygen sensor (this is one of the most common causes of premature failure and is almost always non‑warrantable).

• Avoid touching the sensor tip — skin oils contain salts and contaminants that can damage the ceramic sensing element, causing inaccurate readings and premature failure. Always handle the sensor by the hexagon nut or connector body.

• Do not drop the sensor — the ceramic element inside the metal housing is brittle and can crack upon impact, rendering the sensor inoperative even if no external damage is visible.

• Tighten to the correct torque — typical torque for an M18 × 1.5 oxygen sensor is 40 – 50 Nm (30 – 37 ft‑lb). Some manufacturers specify 28 Nm or 41 Nm — always refer to your vehicle‘s service manual for the exact specification. Use a torque wrench to avoid overtightening or undertightening.

  • CAUTION: Overtightening can damage threads in the exhaust bung and may crack the sensor housing. Undertightening may cause exhaust leaks and false oxygen readings.

• Route the wiring harness securely using the original clips and routing guides to prevent contact with hot exhaust components (exhaust manifold, catalytic converter) or moving parts (drive shafts, steering components, cooling fans). Use zip ties if original clips are missing or damaged, but ensure they are rated for high‑temperature engine bay use.

• Reconnect the electrical connector fully — an audible click confirms correct engagement. Ensure the locking tab is fully seated and locked into place.

• Reconnect the vehicle‘s battery after installation is complete.

Post‑Installation:

• Start the engine and allow it to reach normal operating temperature (closed‑loop mode). This typically takes 5‑10 minutes of driving or idling.

• Verify that no exhaust gas leakage exists around the sensor bung (listen for “puffing” sounds, or use a soap‑and‑water solution sprayed around the threads — bubbles indicate a leak).

• Use an OBD‑II scanner to clear any existing fault codes (old codes stored in the ECU must be cleared to turn off the MIL and reset monitors).

• Drive the vehicle through a complete drive cycle (typically 10‑20 minutes of mixed driving: stop‑start traffic, steady cruising at 50‑60 mph, moderate acceleration and deceleration) to allow the ECU to re‑learn adaptation values and complete oxygen sensor and catalyst monitors.

• After the drive cycle, re‑scan for fault codes to confirm that the oxygen sensor monitors have completed and that no new codes have appeared.

6. Required Tools

7. Professional Installation Recommended

• While this is a direct‑fit part, professional installation is strongly recommended if you are not experienced with exhaust system work or if the sensor is located in a difficult‑to‑reach position (e.g., on the exhaust manifold between the engine and firewall).

• After replacement, the ECU may need to have adaptation values reset using manufacturer‑specific diagnostic equipment (e.g., PSA Diagbox / Planet, Fiat Examiner, or equivalent).

• Improper installation can lead to:

  • Exhaust leaks around the sensor bung

  • Cross‑threaded or damaged exhaust bung threads — expensive to repair, possibly requiring manifold replacement

  • Sensor damage from contamination or mishandling (touching tip, dropping, silicone exposure)

  • Wiring damage from contact with hot exhaust components or moving parts

  • Persistent ECU fault codes despite a correctly functioning sensor

8. Warranty

• OE‑manufactured sensors typically include a manufacturer warranty — commonly 12 months. Aftermarket equivalents may offer varying warranty periods — commonly 1 to 2 years. Check with your specific retailer for their warranty terms and return policy.

• Important: Most warranties are voided if the sensor tip shows contamination from improper handling (e.g., touching the tip, dropping the sensor, silicone exposure, or installation with contaminated hands or tools). Oxygen sensors are often non‑returnable except for approved warranty replacement due to contamination risk.

• Keep your original packaging until the new sensor is installed and confirmed working — you may need it for warranty claims or returns.

9. Common Mistakes to Avoid