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Details
| Specification | Value |
|---|---|
| Brand | HART |
| Category | O2 Sensor |
| Overall Length [mm] | 570 mm |
OE/OEM numbers (34)
Search by this OE number to find compatible parts
- BMW—11 78 1 247 235
- BMW—11 78 1 468 621
- BMW—11 78 1 468 630
- BMW—11 78 1 702 931
- BMW—11 78 1 702 951
- BMW—11 78 1 720 019
- BMW—11 78 1 720 536
- BMW—11 78 1 720 845
- BMW—11 78 1 720 860
- BMW—11 78 1 725 676
- BMW—11 78 1 730 005
- BMW—11 78 1 733 628
- BMW—11 78 1 734 345
- BMW—11 78 1 734 390
- BMW—11 78 1 734 393
- BMW—11 78 1 735 345
- BMW—11 78 1 735 499
- BMW—11 78 1 735 500
- BMW—11 78 1 739 005
- BMW—11 78 1 739 642
- BMW—11 78 1 741 092
- BMW—11 78 1 741 666
- BMW—11 78 1 747 005
- BMW—11 78 1 747 579
- BMW—1734345
- BMW—1734390
- GMC—25172619
- GMC—25172621
- GMC—25172651
- GMC—25172653
- GMC—25172654
- GMC—25172655
- GMC—25172659
- BMW—4 495 874
Where this part fits
Original-fit position for OE 11781702931. The red ring marks where this part installs on the vehicle.
About this product
The HART O2 Sensor (529 429) is a professional-grade replacement component engineered for long service life and reliable operation across all conditions your vehicle encounters. The part is built to the following specification: Overall Length [mm]: 570 mm, Number of circuits: Copper. Each dimension is checked against the OEM reference to ensure the component seats and functions correctly first time. Verified to fit BERTONE, BMW 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: 11 78 1 247 235, 11 78 1 468 621, 11 78 1 468 630, 11 78 1 702 931 and 30 more. Matching these numbers confirms a like-for-like replacement with no loss of function. HART 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 from our UK warehouse with a 30-day money-back guarantee and free hassle-free returns.
Suitable cars
No equivalent parts found.
O2 Sensor HART 529 429 — compatible car models
| Car models | BERTONE: FREECLIMBER 2; BMW: 3 Compact (E36), 3 Convertible (E30), 3 Convertible (E36), 3 Coupe (E36), 3 (E30), 3 (E36), 3 Touring (E30), 3 Touring (E36), 5 (E34), 5 Touring (E34) (+1 more) |
|---|---|
| Engines | 1.6; 316 i; 320 i; 318 i; 530 i V8; 530 i; 730 i, iL V8 |
| Year of manufacture | 1982-2000 |
| Manufacturer article number (MPN) | 529 429 |
| OE part numbers | 11 78 1 247 235, 11 78 1 468 621, 11 78 1 468 630, 11 78 1 702 931, 11 78 1 702 951, 11 78 1 720 019, 11 78 1 720 536, 11 78 1 720 845, 11 78 1 720 860, 11 78 1 725 676, 11 78 1 730 005, 11 78 1 733 628, 11 78 1 734 345, 11 78 1 734 390, 11 78 1 734 393, 11 78 1 735 345, 11 78 1 735 499, 11 78 1 735 500, 11 78 1 739 005, 11 78 1 739 642 (+14 more) |
Compatibility check
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Please wait while we load vehicle compatibility information.Description and what's included
HART 529429 O2 Sensor. Number of circuits: 4. Overall Length [mm]: 570 mm
- 1x O2 Sensor
Shipping, returns, warranty
Free UK delivery on orders over £99.00. Express and standard shipping available.
- Standard delivery: 2-5 business days
- Express delivery: 1-2 business days
- 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 BERTONE, BMW 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 HART O2 Sensor have?
This HART O2 Sensor has the following specifications: Overall Length [mm]: 570 mm; 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: 11 78 1 247 235, 11 78 1 468 621, 11 78 1 468 630, 11 78 1 702 931, 11 78 1 702 951, 11 78 1 720 019, 11 78 1 720 536, 11 78 1 720 845 and 26 more. Cross-reference these numbers with your vehicle's original part number to confirm compatibility.
How much does a O2 Sensor cost?
This HART O2 Sensor is available for £45.99. O2 Sensor prices vary depending on brand, specifications, and vehicle compatibility. HART 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 11 78 1 247 235?
Yes, this HART O2 Sensor is a direct replacement for OE part number 11 78 1 247 235. 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.
