NTK by NGK Lambda/Oxygen O2 Sensor NGK 0466 (OZA527-E27) - 4-Wire, 1490mm Lead - Fits BMW E34 530i 535i M5, E24 635CSi, E32 730i 735i

NTK NGK 0466 OZA527-E27 Lambda Probe for BMW Classics

Restore crisp fuelling and smooth running with the NTK NGK 0466 OZA527-E27 4-wire heated lambda probe. This OE-grade NTK unit delivers clean, stable feedback to your ECU, helping classic BMW engines run at their best, cut emissions and pass MOT checks with confidence. We fit these on our own builds and customer cars and the results speak for themselves – dependable signal quality, fast light-off and long service life.

Why this NTK probe is a smart choice

• OEM-level precision for consistent closed-loop fuelling and crisp throttle response
• 4-wire heated design for quick warm-up and reliable readings at idle and cruise
• 1490 mm harness to suit the listed BMW applications and routing
• Helps reduce fuel consumption, smooth out rough idle and improve drivability
• Boosts the chance of an emissions pass when replacing a tired or slow sensor
• Ideal when diagnosing lambda faults, heater circuit issues or rich/lean trims

Technical details

• Type: Heated zirconia lambda probe
• Circuits: 4-wire
• Lead length: 1490 mm

Part numbers

• NGK: 0466
• NTK: OZA527-E27
• Also referenced as: OZA527E27

Vehicle applications

Please verify the sensor position required on your car, as some models use more than one probe.

• BMW 5 Series E34
  • 530i 3.0 1988 to 1991
  • 535i 3.5 1988 to 1995
  • M5 3.6 1988 to 1992
  • M5 3.8 1992 to 1997
• BMW 6 Series E24
  • 635CSi 1977 to 1989
• BMW 7 Series E32
  • 730i and 730iL 1986 to 1994
  • 735i and 735iL 1986 to 1992

Fitment check before dispatch

Add your UK registration or the last 7 of your VIN at checkout and we will confirm this NTK probe matches your car and the correct location. Many vehicles use separate upstream and downstream sensors, so please check pre-cat or post-cat position, connector style and lead length before ordering.

Professional installation

Prefer us to fit it for you Our in-house workshop at MJ Modifications in Warwickshire can install and code-check your sensor. Request a fitting quote at info@mjmodifications.co.uk.

What this helps resolve

• Excessive fuel consumption and rich smell from the exhaust
• Hesitation, unstable idle or poor cold start manners
• Emissions failures due to incorrect lambda values
• Lambda heater or sensor performance fault codes

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