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NGK

NTK OZA572-E2 Lambda/Oxygen O2 Sensor NGK 0252 - 4-Wire 510mm Heated Pre-Cat Upstream 4-Pin - Fits BMW 3 Series E30 M20 320i 325i 325ix Z1 - Exhaust Gas Oxygen Probe OE-Style Plug Direct Fit

NTK OZA572-E2 Lambda/Oxygen O2 Sensor NGK 0252 - 4-Wire 510mm Heated Pre-Cat Upstream 4-Pin - Fits BMW 3 Series E30 M20 320i 325i 325ix Z1 - Exhaust Gas Oxygen Probe OE-Style Plug Direct Fit

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£129.09 £74.33
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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.

NTK OZA572-E2 Exhaust Oxygen Probe - NGK 0252 - 4 Wire - 510 mm Lead

Bring your classic six-cylinder back to its best with the NTK OZA572-E2, NGK 0252. This heated 4-wire exhaust gas oxygen probe is an OE-supplier part from NTK by NGK, giving dependable mixture control, cleaner tailpipe emissions and improved MPG on M20-powered BMWs. We run these on our own builds and our customers consistently report smooth idle, sharper response and long service life.

If your E30 or Z1 is running rich or lean, hesitating, or struggling at MOT time, a tired sensor is a prime suspect. This direct-fit unit delivers stable feedback for the ECU so your fuel trims stay bang on, helping performance, economy and drivability on every journey.

Why Choose This Sensor

  • Part numbers: NTK OZA572-E2 and NGK 0252
  • Heated 4-wire design for rapid closed-loop operation and consistent signal
  • Lead length 510 mm for the correct routing on factory systems
  • Original equipment quality from the NGK family for reliability and accuracy
  • Plug-and-play connector for straightforward installation on the models listed

Vehicle Applications - BMW M20

Always confirm against your specific chassis and exhaust layout. If you need help, we are happy to check.

  • 3 Series E30 - Saloon
    • 320i 2.0 M20B20 95 kW - 12/1985 to 06/1991
    • 325i 2.5 M20B25 125 kW - 12/1986 to 06/1991
    • 325ix 2.5 M20B25 125 kW - 12/1986 to 08/1991
  • 3 Series E30 - Touring
    • 320i 2.0 M20B20 95 kW - 01/1988 to 12/1991
    • 325i 2.5 M20B25 125 kW - 07/1987 to 03/1993
    • 325ix 2.5 M20B25 125 kW - 06/1988 to 10/1993
  • 3 Series E30 - Convertible
    • 320i 2.0 95 kW - 04/1986 to 10/1993
    • 325i 2.5 125 kW - 09/1987 to 10/1993
  • Z1 Roadster
    • 2.5 M20 125 kW - 06/1988 to 06/1991

Sensor location may differ depending on exhaust and market specification. Verify position before ordering.

Tech Details

  • Circuits: 4
  • Cable length: 510 mm
  • Connection: OE-style plug, ready to fit

Fitting Service

Want it installed by specialists who know E30s inside out? MJ Modifications in Warwickshire offer professional fitting and health checks. Request a quote at info@mjmodifications.co.uk.

Fitment Check Before Dispatch

For peace of mind, we can confirm compatibility before shipping. Add your UK registration or the last 7 of your VIN at checkout and we will verify the part for your car.

Search Terms Our Customers Use

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