OE Quality
60-Day Returns

Beck Arnley 178-8503 Direct Ignition Coil
Reliable Ignition Coil for Infiniti and Nissan Vehicles
The Beck Arnley 178-8503 direct ignition coil is engineered to provide consistent ignition performance for select Infiniti and Nissan models. Designed to meet OEM specifications, this ignition coil supports efficient engine operation and reliable starting.
- Direct ignition coil design for precise spark delivery
- Compatible with Infiniti and Nissan models including 370Z, G37, Q50, and FX50
- Part number 178-8503 ensures exact fit and function
- Contains lead (Pb) as a chemical component, handled under safety guidelines
- Manufactured to meet or exceed OEM quality standards
Product Details and Chemical Considerations
This ignition coil, part number 178-8503, is a direct ignition coil designed for use in various Infiniti and Nissan vehicles such as the 370Z, EX37, FX37, FX50, G37, M37, M56, Q40, Q50, Q60, Q70, Q70L, QX50, and QX70. The product contains lead (Pb), a chemical that requires careful handling during installation and disposal. Users should follow recommended safety procedures to minimize exposure. The coil delivers reliable spark energy to the engine’s cylinders, supporting smooth combustion and engine efficiency.
Compatible Infiniti and Nissan Models
This ignition coil is compatible with a range of Infiniti and Nissan vehicles, including:
- Infiniti 370Z, EX37, FX37, FX50, G37, M37, M56, Q40, Q50, Q60, Q70, Q70L, QX50, QX70
- Nissan models sharing similar ignition system requirements
Common Issues Addressed by This Ignition Coil
- Engine misfires or rough idling
- Difficulty starting the engine
- Reduced fuel efficiency due to incomplete combustion
- Check engine light related to ignition faults
- Loss of engine power or hesitation during acceleration
Installation Notes and Tips
When installing the Beck Arnley 178-8503 ignition coil, ensure the engine is cool and the battery is disconnected to prevent electrical shock. Handle the coil carefully to avoid damage to the electrical connectors. Follow vehicle-specific service manual instructions for removal and installation. Proper torque specifications should be observed to secure the coil without causing damage.
Quality Assurance and Warranty
Beck Arnley ignition coils are manufactured to meet or exceed OEM standards, ensuring reliable performance and durability. The 178-8503 ignition coil undergoes rigorous quality control testing. Warranty coverage details should be confirmed at the time of purchase, typically including protection against manufacturing defects.
| Brand | Beck Arnley |
|---|---|
| Part Number | 178-8503 |
| Are You Using The Long Form Warning | Y |
| Chemical(s) at Issue | LEAD (PB) |
This part fits 67 vehicles. Search below:
| Year | Make | Model | Liters | Cylinders | Position | Notes |
|---|---|---|---|---|---|---|
| 2020 | Nissan | 370Z | 3.7L | V6 | N/A | |
| 2019 | INFINITI | Q70 | 3.7L | V6 | N/A | |
| 2019 | INFINITI | Q70 | 5.6L | V8 | N/A | For Rear Two Cylinders |
| 2019 | INFINITI | Q70L | 3.7L | V6 | N/A | |
| 2019 | INFINITI | Q70L | 5.6L | V8 | N/A | For Rear Two Cylinders |
| 2019 | Nissan | 370Z | 3.7L | V6 | N/A | |
| 2018 | INFINITI | Q70 | 3.7L | V6 | N/A | |
| 2018 | INFINITI | Q70 | 5.6L | V8 | N/A | For Rear Two Cylinders |
| 2018 | INFINITI | Q70L | 3.7L | V6 | N/A | |
| 2018 | INFINITI | Q70L | 5.6L | V8 | N/A | For Rear Two Cylinders |
| 2018 | Nissan | 370Z | 3.7L | V6 | N/A | |
| 2017 | INFINITI | Q70 | 3.7L | V6 | N/A | |
| 2017 | INFINITI | Q70 | 5.6L | V8 | N/A | For Rear Two Cylinders |
| 2017 | INFINITI | Q70L | 3.7L | V6 | N/A | |
| 2017 | INFINITI | Q70L | 5.6L | V8 | N/A | For Rear Two Cylinders |
| 2017 | INFINITI | QX50 | 3.7L | V6 | N/A | |
| 2017 | INFINITI | QX70 | 3.7L | V6 | N/A | |
| 2017 | Nissan | 370Z | 3.7L | V6 | N/A | |
| 2016 | INFINITI | Q70 | 3.7L | V6 | N/A | |
| 2016 | INFINITI | Q70 | 5.6L | V8 | N/A | For Rear Two Cylinders |
| 2016 | INFINITI | Q70L | 3.7L | V6 | N/A | |
| 2016 | INFINITI | Q70L | 5.6L | V8 | N/A | For Rear Two Cylinders |
| 2016 | INFINITI | QX50 | 3.7L | V6 | N/A | |
| 2016 | INFINITI | QX70 | 3.7L | V6 | N/A | |
| 2016 | Nissan | 370Z | 3.7L | V6 | N/A | |
| 2015 | INFINITI | Q40 | 3.7L | V6 | N/A | |
| 2015 | INFINITI | Q50 | 3.7L | V6 | N/A | |
| 2015 | INFINITI | Q60 | 3.7L | V6 | N/A | |
| 2015 | INFINITI | Q70 | 3.7L | V6 | N/A | |
| 2015 | INFINITI | Q70 | 5.6L | V8 | N/A | For Rear Two Cylinders |
| 2015 | INFINITI | Q70L | 3.7L | V6 | N/A | |
| 2015 | INFINITI | Q70L | 5.6L | V8 | N/A | For Rear Two Cylinders |
| 2015 | INFINITI | QX50 | 3.7L | V6 | N/A | |
| 2015 | INFINITI | QX70 | 3.7L | V6 | N/A | |
| 2015 | Nissan | 370Z | 3.7L | V6 | N/A | |
| 2014 | INFINITI | Q50 | 3.7L | V6 | N/A | |
| 2014 | INFINITI | Q60 | 3.7L | V6 | N/A | |
| 2014 | INFINITI | Q70 | 3.7L | V6 | N/A | |
| 2014 | INFINITI | Q70 | 5.6L | V8 | N/A | For Rear Two Cylinders |
| 2014 | INFINITI | QX50 | 3.7L | V6 | N/A | |
| 2014 | INFINITI | QX70 | 3.7L | V6 | N/A | |
| 2014 | INFINITI | QX70 | 5.0L | V8 | N/A | For Rear Two Cylinders |
| 2014 | Nissan | 370Z | 3.7L | V6 | N/A | |
| 2013 | INFINITI | EX37 | 3.7L | V6 | N/A | |
| 2013 | INFINITI | FX37 | 3.7L | V6 | N/A | |
| 2013 | INFINITI | FX50 | 5.0L | V8 | N/A | For Rear Two Cylinders |
| 2013 | INFINITI | G37 | 3.7L | V6 | N/A | |
| 2013 | INFINITI | M37 | 3.7L | V6 | N/A | |
| 2013 | INFINITI | M56 | 5.6L | V8 | N/A | For Rear Two Cylinders |
| 2013 | Nissan | 370Z | 3.7L | V6 | N/A | |
| 2012 | INFINITI | FX50 | 5.0L | V8 | N/A | For Rear Two Cylinders |
| 2012 | INFINITI | G37 | 3.7L | V6 | N/A | |
| 2012 | INFINITI | M37 | 3.7L | V6 | N/A | |
| 2012 | INFINITI | M56 | 5.6L | V8 | N/A | For Rear Two Cylinders |
| 2012 | Nissan | 370Z | 3.7L | V6 | N/A | |
| 2011 | INFINITI | FX50 | 5.0L | V8 | N/A | For Rear Two Cylinders |
| 2011 | INFINITI | G37 | 3.7L | V6 | N/A | |
| 2011 | INFINITI | M37 | 3.7L | V6 | N/A | |
| 2011 | INFINITI | M56 | 5.6L | V8 | N/A | For Rear Two Cylinders |
| 2011 | Nissan | 370Z | 3.7L | V6 | N/A | |
| 2010 | INFINITI | FX50 | 5.0L | V8 | N/A | For Rear Two Cylinders |
| 2010 | INFINITI | G37 | 3.7L | V6 | N/A | |
| 2010 | Nissan | 370Z | 3.7L | V6 | N/A | |
| 2009 | INFINITI | FX50 | 5.0L | V8 | N/A | For Rear Two Cylinders |
| 2009 | INFINITI | G37 | 3.7L | V6 | N/A | |
| 2009 | Nissan | 370Z | 3.7L | V6 | N/A | |
| 2008 | INFINITI | G37 | 3.7L | V6 | N/A |
* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
This part directly replaces or is cross-referenced with the following part numbers:
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.