1 1

NGK

NTK NGK O2 Oxygen Lambda Sensor 91389 OZA811-EE12, Heated 4-Wire, Direct Fit for BMW Petrol E36 E46 E39 E60 E61 E38 E65 E66 E67 E31 E83 E53 E85 (3/5/7/8 Series, X3 X5, Z3 Z4), Upstream/Downstream Pre/Post Cat

NTK NGK O2 Oxygen Lambda Sensor 91389 OZA811-EE12, Heated 4-Wire, Direct Fit for BMW Petrol E36 E46 E39 E60 E61 E38 E65 E66 E67 E31 E83 E53 E85 (3/5/7/8 Series, X3 X5, Z3 Z4), Upstream/Downstream Pre/Post Cat

£50.57
£78.20 £50.57
Sale Sold out
Shipping calculated at checkout.

Heads-up on cancellations & returns: if you cancel an order or return an item, you won't get back 100% of what you paid. We apply a 10% restocking fee, the outbound shipping is non-refundable, and we have to pass on Shopify / PayPal payment processing fees; these aren't returned to us when we refund you. International orders also lose on exchange-rate spread in both directions. If the original packaging is damaged or missing, a reboxing charge applies. For international orders specifically, if you refuse to pay our shipping invoice or supply a prepaid label after placing the order, the same deductions apply. We're upfront about this — please be sure of your purchase before ordering.

BMW petrol exhaust gas sensor by NTK - 4-wire heated plug-in probe - NGK 91389 / NTK OZA811-EE12

Bring back crisp throttle response, stable idle and proper fuel economy with this NTK by NGK exhaust oxygen probe for BMW petrol models. Part numbers 91389 and OZA811-EE12. This plug-in sensor is engineered for multiple E-chassis platforms and delivers fast light-off, precise feedback and long service life to keep your ECU in closed-loop control.

At MJ Modifications we run NTK sensors on our own cars and customer builds. The reliability, quick warm-up and consistent readings speak for themselves, and our customers consistently report smoother running and cleaner emissions after fitting.

Reasons enthusiasts choose this NTK probe

  • Plug-in BMW fitment with the correct OEM-style connector and loom length for an easy install
  • Heated element with 4-core harness for rapid operation and stable fuel trims
  • Accurate mixture feedback helps restore driveability, MPG and emissions performance
  • Suitable for positions ahead of the catalyst or after the catalyst depending on application
  • Trusted NTK by NGK quality used daily by workshops and performance tuners

Key details

Type Exhaust oxygen probe - lambda - AFR feedback sensor
Heater Integrated heater element
Wiring 4-wire
Cable length 1025 mm
NGK part number 91389
NTK reference OZA811-EE12

Position note: suitable for front or rear locations relative to the catalytic converter depending on the specific engine. Always confirm fitment before purchase.

BMW applications overview

Covers a wide range of BMW petrol platforms across 3 Series, 5 Series, 7 Series, 8 Series, X3, X5, Z3 and Z4 on the following E-chassis: E36, E46, E39, E60, E61, E38, E65, E66, E67, E31, E83, E53, E85.

  • 3 Series: E36 and E46 models including Saloon, Touring, Coupe, Convertible and Compact variants such as 320i, 323i, 325i, 325xi, 328i, 330i, 330xi
  • 5 Series: E39, E60, E61 petrol trims including 520i, 523i, 525i, 528i, 530i
  • 7 Series: E38, E65, E66, E67 including 728i, 730i, 730Li
  • 8 Series: E31 850Ci 5.4
  • X models: X3 E83 2.5i and 3.0i xDrive, X5 E53 3.0i
  • Z models: Z3 2.0, 2.2, 2.8, 3.0 and Z4 E85 2.2i, 2.5i, 3.0i

Provide your UK registration or the last 7 of your VIN at checkout and we will double-check compatibility before dispatch.

Search phrases our customers use

BMW exhaust gas sensor, BMW AFR sensor, BMW fuel trim sensor, BMW front oxygen probe, BMW rear lambda, catalyst monitoring sensor, pre cat lambda BMW, post cat lambda BMW, B1S1 sensor BMW, B1S2 sensor BMW, BMW 3 Series petrol sensor, BMW 5 Series petrol sensor, BMW 7 Series petrol probe, BMW 8 Series probe, BMW X3 petrol sensor, BMW X5 petrol sensor, BMW Z3 lambda, BMW Z4 oxygen probe, NGK 91389 sensor, NTK OZA811-EE12 probe, plug-in BMW lambda, UK BMW emissions sensor, BMW upstream sensor, BMW downstream sensor, BMW petrol mixture sensor, replacement BMW exhaust sensor, BMW O2 probe UK, BMW direct plug sensor.

Fitting and support

Want it installed correctly first time. Book professional fitting with MJ Modifications in Warwickshire. Request a quote at info@mjmodifications.co.uk.

Unsure which position you need. Email your UK reg or last 7 VIN characters for a free compatibility check.

What is included

  • NTK by NGK exhaust oxygen probe - part OZA811-EE12
  • NGK 91389 4-wire heated sensor with the correct BMW-style connector

Refresh your ageing BMW lambda with proven NTK performance and enjoy sharper response, refined idle and efficient fuelling. Order NGK 91389 - NTK OZA811-EE12 today.

View full details