Skip to product information
4Pcs Upstream Downstream Oxygen O2 Sensor
for 2003 BMW 325Ci 325i 330Ci 330i 525i 2.5L 3.0L BMW X3 L6 3.0L
Replaces OE: 234-5137 234-4473
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 18 - Aug 21
🚚 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.
30-Day Return & Refund
📦 Free Returns & Exchanges: Zero costs to you if the product has any quality issues.
💰 Full Refunds: 100% money-back guarantee within 30 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.
$77.95
- 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
|
Notes
|
|---|---|---|---|---|
|
2003
|
BMW
|
325Ci (Coupe)
|
2.5L L6 (M54)
|
From 3/03; Base
|
|
2003
|
BMW
|
325i (Sedan)
|
2.5L L6 (M54)
|
From 3/03; Base
|
|
2003
|
BMW
|
330Ci (Coupe)
|
3.0L L6
|
From 03/03; Base
|
|
2003
|
BMW
|
330i (Sedan)
|
3.0L L6
|
From 03/03; Base
|
|
2004-2005
|
BMW
|
325i (Sedan)
|
2.5L L6 (M54)
|
Base
|
|
2004-2006
|
BMW
|
325Ci (Coupe)
|
2.5L L6 (M54)
|
Base
|
|
2004-2005
|
BMW
|
330i (Sedan)
|
3.0L L6
|
Base
|
|
2004-2005
|
BMW
|
525i (Sedan)
|
2.5L L6
|
Base
|
|
2004-2005
|
BMW
|
530i (Sedan)
|
3.0L L6
|
Base
|
|
2004-2006
|
BMW
|
330Ci (Coupe)
|
3.0L L6
|
Base
|
|
2005
|
BMW
|
330Ci (Coupe, M Sport)
|
3.0L L6
|
M trim (ZHP spec)
|
|
2005
|
BMW
|
330i (Sedan, M Sport)
|
3.0L L6
|
M trim (ZHP spec)
|
|
2004-2006
|
BMW
|
X3 3.0i (SUV)
|
3.0L L6
|
Auto Trans
|
Product Specifications
Warranty & Support: 2 Years + Pre-sale Load Test + 24/7 Technical Support
|
Item
|
Specification
|
|---|---|
|
Core Part Number
|
234-5137
Interchange: 2345137, 234 5137, 11787523434, 11787523435, 24315, 250-25016, 25025016 |
|
Position
|
Exhaust System, Upstream (Pre-Catalytic Converter)
|
|
Key Parameters
|
- Connector Gender: Male
- Sensor Type: Heated Wide-Band Oxygen Sensor (5-Wire AFR) - Thread Diameter: 0.711 IN - Wire Quantity: 5 Wires - Wiring Harness Length: 38.66 IN - Grade Type: Regular - Fit Type: Specific |
|
Core Part Number
|
234-4473
Interchange: 2344473, 234 4473, 11787514926, 11787514927, 25658, 25024677, ES10914 |
|
Position
|
Exhaust System, Downstream (Post-Catalytic Converter)
|
|
Key Parameters
|
- Connector Gender: Male
- Mounting Type: Threaded - Sensor Type: Heated Narrow-Band Oxygen Sensor - Thread Diameter: 0.708 IN - Wire Quantity: 4 Wires - Wire Harness Length: 38.58 IN - Grade Type: Regular - Fit Type: Specific |
Package Content :
4PCS (2*234-5137 Upstream+2*234-4473 Downstream) Oxygen Sensor