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4Pcs O2 Sensor
for BMW 545i 645Ci 4.4L V8 (2004-2005 Manual Trans)
Replaces OE: 234-5133 234-5134 234-4470
Resolves Symptoms:
Persistent Check Engine Light
Rough Idle
Poor Fuel Economy
Lean Hesitation
Check if your car is compatible
This helps guarantee fitment of parts.
Delivery Free
Aug 1 - Aug 4
🚚 Fast US Local: Dispatched quickly from our local US warehouses for swift delivery.
2-Year Warranty
🛡️ Quality Coverage: Protects against any manufacturing defects for 2 full years.
🔄 Free Replacement: We will provide a brand-new replacement for free if any quality issues occur.
60-Day Return & Refund
📦 Free Returns & Exchanges: Zero costs to you if the product has any quality issues.
💰 Full Refunds: 100% money-back guarantee within 60 days for defective items.
Review Rewards & Cashback
Share an install photo & review to unlock tier rewards:
🥈 Under $50
3% Off Next Order
🥇 $50+ Orders
5% Direct Cashback
🔥 Tip: Buy a Combo Set to easily hit $50 and unlock 5% Cashback!
💡 How to claim: Email a screenshot of your review to our support team.
$149.95
- No other fees; this is the final payment price
- Get rid of your car's malfunctions and start a pleasant driving journey
Check Engine Light? Find Your Symptoms
🌬️ O2 & A/F Sensors
- P0134No Activity Detected
- P0135Heater Circuit Malfunction
- P0137/38Circuit Low/High Voltage
- P2195Signal Stuck Lean
- P0030/31Heater Control Circuit
⛽ Fuel & Air Mixture
- P0171/74System Too Lean
- P0172System Too Rich
- P2096Post-Catalyst Trim Too Lean
- P0087Fuel Rail Pressure Low
- P0201-04Injector Circuit Open
♻️ Catalytic Converters
- P0420Efficiency Below Threshold (B1)
- P0430Efficiency Below Threshold (B2)
⚡ Ignition / Misfires
- P0300Random Misfire
- P0301-06Cylinder-Specific Misfire
🚛 NOx Sensors & SCR
- P2200/02Sensor Circuit / Signal Low
- P229FCircuit Range/Performance
- P207FReductant Quality Perf.
- 46F2/4D16BMW SCR Efficiency Faults
🛑 ABS & Wheel Speed
- C1021Front Wheel Speed Sensor
- C1025Sensor Signal Erratic
- C1207ABS Pump Overrun
- C0561System Disabled
Automotive-Leader Sensors
Vehicle Compatible
|
Year
|
Make
|
Model
|
Engine/Displacement
|
|---|---|---|---|
|
2004-2005
|
BMW
|
545I
|
4.4L V8
|
|
2004-2005
|
BMW
|
645CI
|
4.4L V8
|
Product Specifications
Warranty & Support: 2 Years + 24/7 Technical Support
|
Item
|
Specification
|
|---|---|
|
Core Part Number
|
234-5133
Interchange: 11787512983, 11787516149, 11787516150, 11787521705 |
|
Position
|
Exhaust System, Upstream (Pre-Catalytic Converter)
|
|
Key Parameters
|
- Connector Gender: Male
- Sensor Type: Heated - Thread Diameter: 0.711 IN - Wire Quantity: 5 Wires - Wiring Harness Length: 24.37 IN - Grade: Regular - Fit Type: Specific |
|
Core Part Number
|
234-5134
Interchange: 11787515826, 11787515827, 11787529980, 11787530736, 24321, 17255, ES10921 |
|
Position
|
Exhaust System, Upstream (Pre-Catalytic Converter)
|
|
Key Parameters
|
- Connector Gender: Male
- Sensor Type: Heated - Thread Diameter: 0.711 IN - Wire Quantity: 5 Wires - Wiring Harness Length: 40.67 IN - Grade: Regular - Fit Type: Specific |
|
Core Part Number
|
234-4470
Interchange: 11787506539, 11787512002, 11787512567, 11787512973, 11787836451, 2344471, 25627, 15682 |
|
Position
|
Exhaust System, Downstream (Post-Catalytic Converter)
|
|
Key Parameters
|
- Connector Gender: Male
- Mounting Type: Threaded - Sensor Type: Heated - Thread Diameter: 0.708 IN - Wire Quantity: 4 Wires - Wiring Harness Length: 16.73 IN - Grade: Regular - Fit Type: Specific |
Package Included: 4 PCS Oxygen Sensors
234-5134 (5-wire oxygen sensor): Upstream Right, Bank 1 Sensor 1, Cylinder 1,2,3, before catalytic converter 1X
234-5133 (5-wire oxygen sensor): Upstream Left, Bank 2 Sensor 1, Cylinder 4,5,6, before catalytic converter 1X
234-4470 (4-wire oxygen sensor): Downstream Right, Bank 1 Sensor 2, Cylinder 1,2,3, after catalytic converter 1X
234-4470 (4-wire oxygen sensor): Downstream Left, Bank 2 Sensor 2, Cylinder 4,5,6, after catalytic converter 1X