BMW 3 Series E36 320i 2.0 Petrol Upstream O2 Oxygen Lambda Sensor (Pre-Cat, Bank 1 Sensor 1) NGK 1943 NTK OTA7H-3A2 - Heated 4-Wire 398mm Lead - OE Replacement Direct Fit - 1990-1999

Direct-fit heated lambda probe for BMW E36 320i petrol models

Restore crisp throttle response, stable idle and cleaner emissions with this high quality NTK heated exhaust gas sensor. Supplied as NGK part number 1943 with NTK reference OTA7H-3A2, this 4‑wire unit with a 398 mm lead is a precise OE‑equivalent replacement that delivers fast light up, consistent feedback for closed‑loop control and long service life. Ideal when your 3 Series is running rich or lean, failing an emissions test, using more fuel than it should or showing a warning light related to the front lambda probe.

We have fitted this exact sensor on our own cars and for many customer vehicles with excellent results. Feedback has been consistently positive for driveability, MPG and MOT emissions.

Why this sensor

• Genuine NTK engineering by NGK for dependable accuracy and durability
• 4‑pin heated design for rapid warm up and stable fuel trims
• 398 mm cable length with the correct plug for quick, plug‑and‑play installation
• OE‑grade calibration helps reduce hesitation, surging and excessive fuel consumption
• Great fix for rough idle, rich smell from the exhaust, poor MPG and emissions failures

Specifications

Vehicle fitment

• BMW 3 Series Saloon E36 — 320i 2.0 110 kW 150 HP 09/1990 to 02/1998
• BMW 3 Series Coupe E36 — 320i 2.0 110 kW 150 HP 03/1992 to 04/1999
• BMW 3 Series Convertible E36 — 320i 2.0 110 kW 150 HP 12/1993 to 04/1999

Pre‑purchase compatibility check

For peace of mind we can verify the correct part before dispatch. Add your UK registration or the last 7 characters of your VIN at checkout and we will confirm suitability for your specific E36 320i.

Fitting and support

Professional installation is recommended. Book expert fitting with MJ Modifications in Warwickshire. Request a quote at info@mjmodifications.co.uk. We are happy to help with diagnosis and guidance on lambda probe replacement and post‑install checks such as clearing fault codes and adaptations.

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