NTK NGK 1932 Lambda/Oxygen O2 Sensor OTA7H-3A1, 4-Wire Heated, Direct Plug & Play for BMW 5 Series E34 520i 2.0 24V (1989-1997), Upstream/Downstream Pre-Cat Post-Cat AFR Exhaust Gas Probe, OE-Spec Replacement, Saloon/Touring

NTK NGK 1932 Lambda Probe OTA7H-3A1 | 4‑Wire Heated Sensor | Direct Plug-in for BMW E34 520i

Restore crisp drivability, stable idle and clean exhaust with this NTK NGK 1932 OTA7H-3A1 heated lambda probe. It is a direct plug-in, OE-spec replacement with the factory connector and correct four-conductor harness, giving accurate air fuel feedback so your engine management can trim fueling precisely. We have fitted this part in-house on customer cars and feedback has been consistently positive for reliability, fit, and emissions performance.

• Direct plug-in fitment with OE-style connector for quick installation
• Heated 4-wire design for fast light-off and steady closed-loop control
• Smooth throttle response and consistent fuel economy when replacing a tired probe
• Supports MOT emissions compliance and helps clear lambda-related warning lights
• Premium NTK component from NGK for dependable long-term service

Why enthusiasts choose this sensor

If your E34 520i feels flat, runs rich or lean, or shows mixture fault codes, a worn-out probe is a common culprit. This NTK unit restores accurate exhaust feedback, helping the ECU maintain the correct mixture under all conditions. The cable length is engineered for the BMW loom, so there is no cutting or splicing. Just plug in, route correctly and enjoy consistent running.

Compatibility

Confirmed applications for NTK NGK 1932 OTA7H-3A1:

• BMW 5 Series E34 Saloon
  • 520i 2.0 24V 110 kW / 150 hp 09/1989 to 09/1995
• BMW 5 Series E34 Touring
  • 520i 2.0 110 kW / 150 hp 11/1991 to 01/1997

Position can vary by model year. This 4-wire heated probe may serve the front or rear location depending on your setup. If unsure, contact us and we will confirm before dispatch.

Technical details

Part numbers

• NGK: 1932
• NTK reference: OTA7H-3A1

Fitment help and installation

Need it fitted professionally? MJ Modifications is based in Warwickshire and can install this sensor for you. Email info@mjmodifications.co.uk for a quote and availability.

Not sure it is right for your car? We can verify compatibility before dispatch using your UK registration or the last 7 digits of your VIN. Add your details at checkout or email us and we will confirm the correct probe and position.

What customers say

We have used this NTK probe on our own builds and customer vehicles with excellent results. Owners report smoother running, quicker warm-up into closed loop and improved MPG versus a failing sensor, along with reliable long-term operation.

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