HIGH QUALITY GENUINE OEM, AFTERMARKET SPARES
If you own a Maruti Swift 2024 and are experiencing poor mileage, engine warning lights, or rough performance, the oxygen (O₂) sensor could be the culprit. Replacing a faulty O₂ sensor on time not only restores fuel efficiency but also prevents costly engine damage. In this guide, we’ll cover the replacement cost of the O₂ sensor, common failure symptoms, and easy-to-follow DIY steps—helping you save money and make an informed decision.
An oxygen sensor monitors the oxygen level in exhaust gases and sends data to the ECU (Engine Control Unit). This helps your car adjust the air-fuel mixture for optimal combustion.
• Reduced fuel efficiency
• Increased emissions
• Poor engine performance
• Failed emission tests
Over time, the O₂ sensor may wear out or get contaminated due to poor fuel quality, oil leaks, or high exhaust temperatures. This disrupts the ECU's ability to manage combustion accurately.
Timely replacement of the O₂ sensor restores accurate readings and ensures fuel efficiency. OEM sensors provide better reliability for newer models like the Maruti Swift 2024.
Watch out for these common signs:
• Check engine light ON
• Sudden drop in mileage
• Engine hesitation or jerking
• Strong fuel smell from the exhaust
• Poor acceleration
Early detection and action can prevent long-term damage to your vehicle.
Here’s a realistic breakdown of expected costs:
| Component | Estimated Cost (₹) |
|---|---|
| O₂ Sensor (OEM) | ₹2,500 – ₹4,500 |
| Aftermarket Sensor | ₹1,800 – ₹3,000 |
| Labor Charges | ₹800 – ₹1,500 |
| Total Cost | ₹2,600 – ₹6,000 |
Pro Tip: Authorized service centers charge more but offer OEM quality and warranty. DIY replacement can save up to ₹1,500 in labor costs.
Yes, this is a beginner-friendly DIY job if you have basic tools and mechanical confidence.
• O2 sensor socket or 22mm wrench
• Ratchet & extension
• Penetrating oil (WD-40)
• Gloves & safety glasses
Step 1: Locate the O₂ sensor (usually on the exhaust manifold or before/after the catalytic converter)
Step 2: Disconnect the battery to avoid ECU issues
Step 3: Spray penetrating oil and loosen the old sensor using the correct socket
Step 4: Install the new sensor (hand-tighten first, then secure with torque)
Step 5: Reconnect the wiring and battery
Step 6: Reset the ECU (optional via battery disconnect or OBD scanner)
Time required: 30–45 minutes
| OEM Sensor | Aftermarket Sensor |
|---|---|
| Perfect compatibility | Budget-friendly |
| Higher durability | Quality varies |
| Higher cost | May lack long-term reliability |
Recommendation: For newer cars like the Swift 2024, OEM sensors are best for long-term reliability and resale value.
Typically between 60,000 and 100,000 km, depending on:
• Driving conditions
• Fuel quality
• Engine health
Regular servicing helps extend its lifespan.
Replacing a faulty O₂ sensor is a smart and cost-effective decision. It restores performance, improves mileage, and prevents costly engine damage. Whether you go for a DIY approach or professional service, acting early always pays off.
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