NGK
NGK Camshaft Position Sensor CHN3-V172, NGK 81171 for BMW – 1/3/5/6/7 Series E36 E46 E39 E90 E60 E65 X3 E83 X5 E53 Z3 Z4 – 3-Pin Oval Connector – OE Quality Direct Replacement CMP Sensor
NGK Camshaft Position Sensor CHN3-V172, NGK 81171 for BMW – 1/3/5/6/7 Series E36 E46 E39 E90 E60 E65 X3 E83 X5 E53 Z3 Z4 – 3-Pin Oval Connector – OE Quality Direct Replacement CMP Sensor
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NGK 81171 CHN3-V172 Cam Phase Sensor for BMW Petrol Models
Looking for a reliable fix for hard starting, lumpy idle or inconsistent power delivery on your BMW petrol? This NGK 81171 CHN3-V172 cam angle sensor is a plug-in, OE-spec replacement that restores clean timing synchronisation and crisp throttle response. It uses a 3 pin oval plug and is a direct swap for the tired original unit on a wide range of BMW chassis.
We fit these sensors on our own builds and customer cars at MJ Modifications and they just work. Consistent signal quality, stable idle and confident cold starts are exactly what you get with this NGK solution. Customers regularly report a smoother drive and the end of intermittent engine warning lights linked to cam synchronisation faults.
Why this NGK unit is a smart choice
- OE-spec performance for BMW petrol applications with precise, repeatable cam synchronisation
- Direct swap fitment with three pin oval connector for fast, hassle-free installation
- Cures long crank, uneven idle, hesitation and flat spots related to worn cam angle pickups
- Built for durability and consistent signal integrity for dependable running
- Trusted by enthusiasts and workshops for fault-finding and preventative maintenance
Part details
- Part number: NGK 81171
- Reference: CHN3-V172
- Connector: 3 pin
- Connector shape: Oval
- Design: Sensor only without cable
Compatible BMW models
Suits a broad range of BMW petrol variants, including:
- 1 Series E81 E87 116i 118i 120i
- 3 Series E36 E46 E90 E91 316i 318i 320i 323i 325i 328i 330i
- 5 Series E39 E60 E61 520i 523i 525i 528i 530i
- 6 Series E63 E64 645Ci
- 7 Series E38 E65 E66 730i 735i 745i
- X3 E83 2.0i 2.5i 3.0i
- X5 E53 3.0i 4.4i 4.8is
- Z3 E36 1.9i 2.0i 2.2i 2.8i 3.0i
- Z4 E85 2.0i 2.2i 2.5i 3.0i
- Z8 E52 4.9
Not sure it suits your car? Add your UK registration or last 7 of the VIN at checkout and we will confirm before dispatch.
Ideal for these symptoms
- Extended cranking or inconsistent starting
- Hunting or rough idle once warm
- Flat spots, hesitation and poor throttle pickup
- Intermittent engine light linked to cam timing correlation issues
We can fit it
Professional installation available at MJ Modifications in Warwickshire. Request a quote at info@mjmodifications.co.uk.
What you get
- 1 x NGK cam phase sensor CHN3-V172 NGK 81171
Search-friendly terms
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Fit a proven NGK unit and bring back clean idle, sharper response and confidence in your BMW’s engine management.
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