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Details
| Specification | Value |
|---|---|
| Brand | NTK |
| Category | O2 Sensor |
| Length [mm] | 425 mm |
OE numbers (10)
Search by this OE number to find compatible parts
- MAYBACH / MERCEDES-BENZ / SMART / STEYR—003 542 81 18
- MAYBACH / MERCEDES-BENZ / SMART / STEYR—003 554 28 11 8
- MAYBACH / STEYR / MERCEDES-BENZ / SMART—004 542 53 18
- CHRYSLER / DODGE—05033 400 AA
- MITSUBISHI—1588 A035
- CHRYSLER / DODGE—56028 994 AA
- CHRYSLER / DODGE / JEEP—56029049AA
- MAYBACH / MERCEDES-BENZ / SMART / STEYR—A 003 542 81 18
- MAYBACH / MERCEDES-BENZ / SMART / STEYR—A 003 554 28 11 8
- MAYBACH / SMART / STEYR / MERCEDES-BENZ—A 004 542 53 18
Where this part fits
Original-fit position for OE 56029049AA.
About this product
Sourced from NTK, this o2 sensor (96146) combines precision engineering with durable materials to meet the demands of everyday driving and extended service intervals. Technical specifications — Length [mm]: 425 mm, Oxygen Sensor: Aluminium, Oxygen Sensor: Carbon, Number of circuits: Copper — are verified against the OEM data sheet to guarantee fitment accuracy and performance parity with the original equipment. Verified to fit MERCEDES-BENZ, SMART models. All compatibility data is cross-checked against the TecDoc database — select your vehicle to confirm the part matches your specific engine and year. This part supersedes original equipment references: 003 542 81 18, 003 554 28 11 8, 004 542 53 18, 004 542 5318 and 110 more. Matching these numbers confirms a like-for-like replacement with no loss of function. NTK is a recognised supplier of automotive replacement components to independent workshops and dealer networks across Europe. All parts are sourced from authorised distribution channels and carry full manufacturer traceability — you receive exactly the same component supplied to professional garages and dealer workshops. If fitment or specifications do not match your vehicle, our technical team can help identify the correct alternative — use the vehicle selector or contact us with your VIN for a guaranteed-fit recommendation. Replacing worn components on schedule preserves your vehicle's safety, reliability, and resale value — and aftermarket parts from established brands deliver OEM-equivalent performance at a fraction of the dealer price. Every part is dispatched with tracked delivery and a 14-day money-back guarantee with hassle-free returns.
Suitable cars
Equivalent products (116)
Show all 116 OE numbers
O2 Sensor NTK 96146 — compatible car models
| Car models | MERCEDES-BENZ: A-CLASS (W169); SMART: FORTWO Cabrio (451), FORTWO Coupe (451) |
|---|---|
| Engines | A 150 (169.031, 169.331); 1.0 (451.431, 451.480); 1.0 (451.330, 451.334) |
| Year of manufacture | 2004-2012 |
| Manufacturer article number (MPN) | 96146 |
| OE part numbers | 003 542 81 18, 003 554 28 11 8, 004 542 53 18, 05033 400 AA, 1588 A035, 56028 994 AA, 56029049AA, A 003 542 81 18, A 003 554 28 11 8, A 004 542 53 18 |
Compatibility check
Loading vehicle data…
Please wait while we load vehicle compatibility information.Description and what's included
NTK 96146 O2 Sensor. Length [mm]: 425 mm. Number of circuits: 4. Oxygen Sensor: 2. Oxygen Sensor: 8
- 1x O2 Sensor
Shipping, returns, warranty
Free UK delivery on orders over £99.00. Tracked standard shipping.
- Standard delivery: 5–9 business days
- Order before 5pm — ships the next working day
- Free returns within 14 days
- All parts backed by manufacturer warranty
Warranty: 12-month manufacturer warranty on all parts. 14-day money-back guarantee if the part doesn't fit your vehicle.
Frequently Asked Questions
Is this O2 Sensor compatible with my car?
This O2 Sensor fits MERCEDES-BENZ, SMART vehicles. Use the vehicle selector at the top of the page to check exact compatibility — enter your car's make, model, and engine for a confirmed fitment match. All fitment data is verified through TecDoc.
What specifications does this NTK O2 Sensor have?
This NTK O2 Sensor has the following specifications: Length [mm]: 425 mm; Oxygen Sensor: 2; Oxygen Sensor: 8; Number of circuits: 4. Check the full specifications table above for complete details.
What OE part numbers does this O2 Sensor replace?
This O2 Sensor replaces OE part numbers: 003 542 81 18, 003 554 28 11 8, 004 542 53 18, 05033 400 AA, 1588 A035, 56028 994 AA, 56029049AA, A 003 542 81 18 and 2 more. Cross-reference these numbers with your vehicle's original part number to confirm compatibility.
How much does a O2 Sensor cost?
This NTK O2 Sensor is available for £71.99. O2 Sensor prices vary depending on brand, specifications, and vehicle compatibility. NTK parts offer a balance of quality and value, backed by our 14-day money-back guarantee.
How do I know when to replace my O2 Sensor?
Symptoms include increased fuel consumption, rough idle, failed emissions test, check engine light, or reduced engine performance.
What tools do I need to replace a O2 Sensor?
Tools needed: lambda sensor socket wrench (22mm slotted), penetrating oil (apply 24 hours before removal on vehicles with high mileage or corrosion), oxygen sensor thread chaser, torque wrench (40-55 Nm), OBD-II scanner. Difficulty: Moderate DIY. Safety warning: Only remove on a fully cold exhaust. Apply penetrating oil the day before on older vehicles to avoid breaking the sensor in the bung -- a broken sensor requires professional extraction equipment.
Can I use this part as a replacement for OE 003 542 81 18?
Yes, this NTK O2 Sensor is a direct replacement for OE part number 003 542 81 18. It is manufactured to meet or exceed original equipment specifications, ensuring proper fitment and performance. All cross-reference data is verified through TecDoc.
Related categories
Common OE numbers for this part
Common original equipment numbers linked to stocked alternatives.
