Beck Arnley 178-8503 Direct Ignition Coil

Direct Ignition Coil for Nissan and INFINITI

Beck Arnley 178-8503 is a direct ignition coil built for foreign nameplate applications that require OE-style form, fit, and function. It is a practical replacement for Nissan 370Z and select INFINITI V6 and V8 models, including rear-cylinder applications where specified.

Beck Arnley sources parts to match original equipment specifications, giving technicians and DIY owners a straightforward replacement option for ignition service on the 370Z, G37, FX50, and related models. The 178-8503 part number is used across multiple Nissan and INFINITI applications listed below.

Key Features

• Direct ignition coil for OE-style replacement
• Built to match foreign nameplate OE specifications for form, fit, and function
• Fits select Nissan 370Z and INFINITI Q-series, G-series, FX-series, M-series, and QX-series vehicles
• Application coverage includes rear two-cylinder positions on select models
• Beck Arnley part number 178-8503 for ignition system repair

Fitment Details

• Fits 2009-2020 Nissan 370Z, N/A
• Fits 2014-2019 INFINITI Q70, N/A
• Fits 2014-2019 INFINITI Q70, N/A, for rear two cylinders
• Fits 2015-2019 INFINITI Q70L, N/A
• Fits 2015-2019 INFINITI Q70L, N/A, for rear two cylinders
• Fits 2014-2017 INFINITI QX50, N/A
• Fits 2014-2017 INFINITI QX70, N/A
• Fits 2015 INFINITI Q40, N/A
• Fits 2014-2015 INFINITI Q50, N/A
• Fits 2014-2015 INFINITI Q60, N/A
• Fits 2014 INFINITI QX70, N/A, for rear two cylinders
• Fits 2013 INFINITI EX37, N/A
• Fits 2013 INFINITI FX37, N/A
• Fits 2009-2013 INFINITI FX50, N/A, for rear two cylinders
• Fits 2008-2013 INFINITI G37, N/A
• Fits 2011-2013 INFINITI M37, N/A
• Fits 2011-2013 INFINITI M56, N/A, for rear two cylinders

What This Coil Helps Address

• Engine misfire conditions tied to a failing ignition coil
• Rough idle during startup or at stoplights
• Hard starting caused by weak spark output
• Loss of power or hesitation under acceleration
• Check engine light concerns related to ignition performance

Installation Notes and Tips

Verify the exact year, model, and engine position before ordering, especially on applications marked for the rear two cylinders. Compare the original coil connector, mounting points, and cylinder location to confirm the correct Beck Arnley 178-8503 replacement for your Nissan 370Z or INFINITI model.

For best results, inspect spark plugs and related ignition components during coil replacement. A worn plug can place extra load on the coil and contribute to repeat ignition faults.

Quality Assurance

Beck Arnley parts are sourced to meet foreign nameplate OE specifications for form, fit, and function. The brand works with global sourcing partners to supply the correct replacement part for the listed Nissan and INFINITI applications.