NTK O2 Oxygen Lambda Sensor NGK 91389 OZA811-EE12 - Heated 4-Wire - Direct Fit for BMW Petrol E36 E46 E39 E60 E61 E38 E65 E66 E67 E31 E83 E53 E85 - 3 Series 5 Series 7 Series 8 Series X3 X5 Z3 Z4 - Upstream or Downstream Pre Cat or Post Cat
Restore smooth running, strong mid-range performance, clean emissions and proper fuel economy on your BMW with the NTK by NGK application-specific oxygen sensor. This is a direct-fit, heated 4-wire lambda sensor, NGK part number 91389 with NTK reference OZA811-EE12, engineered for a wide range of BMW petrol models including E36, E46, E39, E60, E61, E38, E65, E66, E67, E31, E83, E53 and E85 across 3 Series, 5 Series, 7 Series, 8 Series, X3, X5, Z3 and Z4.
At Nforcd we use NTK sensors on our own builds and customer cars. We have been consistently impressed with the fit-and-forget reliability, fast warm-up, stable readings and the way they help the ECU maintain the ideal air fuel ratio for crisp throttle response, smoother idle and MOT-friendly emissions. Customers tell us this is the oxygen sensor they trust when replacing a tired or failed BMW lambda probe.
Why choose this NTK oxygen sensor for your BMW
- Direct-fit BMW O2 sensor with the correct OEM-style connector and harness length for hassle-free installation
- Heated 4-wire design for rapid warm-up and stable closed-loop control
- Accurate AFR feedback for smoother idle, sharper response and restored fuel economy
- Suitable as upstream or downstream, pre-cat or post-cat lambda sensor depending on model
- Trusted NTK by NGK quality used by enthusiasts and workshops on BMW petrol engines
Technical details
| Sensor type | Lambda sensor - oxygen sensor - O2 sensor |
| Heater | Heated |
| Number of circuits | 4 |
| Cable length | 1025 mm |
| NGK part number | 91389 |
| NTK reference | OZA811-EE12 |
Position note: depending on engine variant this NTK O2 sensor can be used as a pre-cat upstream sensor or a post-cat downstream sensor. Always confirm fitment before ordering.
BMW compatibility highlights
BMW petrol applications include the following. If you are unsure, email sales@nforcd.com and we will confirm the correct lambda sensor.
- 3 Series: E36 Touring 320i, 323i, 328i. E46 Saloon, Coupe, Touring, Convertible including 320i, 323i, 325i, 325xi, 328i, 330i, 330xi and Compact 325Ti
- 5 Series: E39 Saloon and Touring 520i, 523i, 525i, 528i, 530i. E60 Saloon 520i, 525i, 530i. E61 Touring 525i
- 7 Series: E38 728i and 728iL. E65 E66 E67 730i and 730Li
- 8 Series: E31 850Ci 5.4
- X Series: X5 E53 3.0i. X3 E83 2.5i and 3.0i xDrive
- Z Series: Z3 Coupe and Roadster 2.0, 2.2, 2.8, 3.0. Z4 E85 Roadster 2.2i, 2.5i, 3.0i
Provide your UK registration or the last 7 digits of your VIN at checkout and we will double check compatibility before dispatch.
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Professional fitting and support
Want it fitted properly first time. Book installation with Nforcd in Warwickshire. Request a quote at sales@nforcd.com.
We are happy to confirm the correct upstream or downstream lambda sensor for your exact BMW engine and model. Send us your UK registration or the last 7 of your VIN for a free compatibility check.
What you get
- NTK by NGK Lambda Sensor OZA811-EE12
- NGK 91389 heated 4-wire, direct-fit oxygen sensor with correct connector
Replace your ageing BMW O2 sensor with NTK quality and restore precise fuelling, smooth drivability and clean emissions. Order your NTK OZA811-EE12 NGK 91389 BMW oxygen sensor today.