Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
2018 Buick Regal BaseFACTORY OEM SERVICE PROCEDURE
Engine Components - Rear (LGX)
WARNING: This page is about a different car, the 2020 Buick Regal TourX, 2020 Buick Regal, 2019 Buick Regal TourX, and 2019 Buick Regal. However, it is still accessible from the selected car via links, so may be relevant.
Engine Components - Rear (LGX)
| Component Name | Callout |
|---|---|
| B23C Camshaft Position Sensor - Bank 2 Exhaust (LGX) B23C Camshaft Position Sensor - Bank 2 Exhaust | 1 |
| Q38 Throttle Body Q38 Throttle Body | 2 |
| Q12 Evaporative Emission Purge Solenoid Valve Q12 Evaporative Emission Purge Solenoid Valve | 3 |
| T8A Ignition Coil 1 T8A Ignition Coil 1 (LGX) | 4 |
| T8C Ignition Coil 3 T8C Ignition Coil 3 (LGX) | 5 |
| T8E Ignition Coil 5 (LGX) T8E Ignition Coil 5 | 6 |
| Q83A Valve Lifter Oil Solenoid Valve - Bank 1 (LGX) Q83A Valve Lifter Oil Solenoid Valve - Bank 1 | 7 |
| B23A Camshaft Position Sensor - Bank 1 Exhaust (LGX) B23A Camshaft Position Sensor - Bank 1 Exhaust | 8 |
| B52C Heated Oxygen Sensor - Bank 1 Sensor 1 (LGX) B52C Heated Oxygen Sensor - Bank 1 Sensor 1 | 9 |
| B52D Heated Oxygen Sensor - Bank 1 Sensor 2 (LGX) B52D Heated Oxygen Sensor - Bank 1 Sensor 2 | 10 |
| B68A Knock Sensor 1 B68A Knock Sensor 1 | 11 |
| B26 Crankshaft Position Sensor B26 Crankshaft Position Sensor (LGX) | 12 |
| G18 High Pressure Fuel Pump G18 High Pressure Fuel Pump | 13 |
| B23B Camshaft Position Sensor - Bank 1 Intake (LGX) B23B Camshaft Position Sensor - Bank 1 Intake | 14 |
Factory Service Tools
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Disclosure: Verified tool recommendations may earn an affiliate commission at no cost to you.
When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
Rather have a pro handle this?
A certified mobile mechanic comes to your home or office. They bring the tools, you stay comfortable. No tow truck, no waiting room, no surprises.
Comes to youSame-day available12-month warranty
Get a Free QuoteNo obligation. See pricing before you book.