How to inspect the terminal post, insulator, spark plug boot, and spark plug recess area for damage and proper function on Buick Regal?

Examine the terminal post for indication of damage while checking its stability by twisting and pulling since it must stay fixed. The insulator must be inspected for three abnormal conditions including flashover and carbon tracking and soot which appears when electrical charge conducts between the terminal post and ground. The park plug boot needs inspection for damage while the Cylinder Head Spark Plug recess should be checked for any water or oil or coolant presence since these fluids can create ground arcing through the boot. The inspection should determine if any cracks exist in the insulator because they could enable electrical charging to arc beyond the electrodes (3, 4). A proper check of arcing conditions alongside a measurement of the center electrode to side electrode gap is needed to maintain Spark Plug performance because wide gaps lead to operational problems. Comparing the correct Spark Plug torque is vital because low torque may result in operational problems yet high torque can break the insulator. During inspection check for tracking damage in the area near the insulator instead of the center electrode and shake the Spark Plug to detect broken or worn components especially in side electrode and center electrode. Whenever a rattling noise occurs it reveals internal damage whereas a loose center electrode weakens the spark. An inspection must be conducted to check if Spark Plug electrodes (3, 4) display bridged deposits that could affect the spark gap either partially or completely. Inspect all evidence of platinum pads on electrodes (3, 4) to verify their existence. The inspection of debris in the Cylinder Head Spark Plug recess area is necessary to ensure that damaged or dirty threads do not hinder Spark Plug installation.

How to replace a spark plug safely and effectively on Buick Enclave?

Wear safety glasses when removing the Ignition Coil(s) then handle with caution near compressed air. Thoroughly clean the Spark Plug recess zone to stop contaminants from getting into the Cylinder Head because such material might harm the engine or ruin the Cylinder Head threads thus blocking proper insertion of the new plug. Use a thread chaser (Tool Required: You must clean threads with a thread chaser (Tool Required: Thread Chaser). Apply compressed air to blow out debris in the Spark Plug hole after checking that the engine temperature is safe because hot engines can seize threads and harm the Cylinder Head. Next, remove the Spark Plug. Check the vehicle specifications to match new spark plugs with the designated type because improper plug selections will damage the engine critically. All new and reconditioned spark plugs require gap measurement through a round feeler gauge for accuracy because handling can affect pre-set gaps. The opened gap needs to align with the manufacturer's recommended Spark Plug gap requirements. Complete thread insertion should happen without any resistance while seated fully in the Cylinder Head. When needed use a thread chaser to prevent cross-threading and overheating problems during the installation process. After positioning the Spark Plug properly install it keeping torque at 20 n.m (15 lb ft) while also reinstalling any necessary ignition coils.

OEM Buick Spark Plug

Ignition Spark Plug

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20 Spark Plugs found

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Buick Spark Plug Part Number: 12681665
$9.22 MSRP: $16.46
You Save: $7.24 (44%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Spark Plug Assembly-Gasoline Engine Ignition; Spark Plug, Spark Ignition; Spark Plug,Glow
- Replaced by: 12681664
- Replaces: 25162555, 12607234, 25315018, 25162556, 19256067, 89017883
Fits the following Buick Models:
- LaCrosse | 2008-2009 | Super | 8 Cyl 5.3 L GAS
- Rainier | 2004-2007 | CXL, CXL Plus | 6 Cyl 4.2 L GAS, 8 Cyl 5.3 L GAS
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Buick Spark Plug Part Number: 12681657
$9.22 MSRP: $16.46
You Save: $7.24 (44%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Spark Plug Assembly-Gasoline Engine Ignition; Spark Plug, Spark Ignition; Spark Plug,Glow
- Replaces: 12611882
Fits the following Buick Models:
- Enclave | 2008 | CX, CXL | 6 Cyl 3.6 L GAS
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Buick Spark Plug Part Number: 19300872
$7.57 MSRP: $13.52
You Save: $5.95 (45%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Spark Plug Assembly; Spark Plug, Spark Ignition; Spark Plug,Glow
- Replaces: 12597464, 92220447
Fits the following Buick Models:
- Enclave | 2009 | CX, CXL | 6 Cyl 3.6 L GAS
- LaCrosse | 2007-2008 | CXS | 6 Cyl 3.6 L GAS
- Rendezvous | 2005-2006 | CX, CXL, CXL Plus, Ultra | 6 Cyl 3.6 L GAS
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Buick Spark Plug Part Number: 12683541
$9.41 MSRP: $16.80
You Save: $7.39 (44%)
ADD TO CART
Product Specifications
- Other Name: Spark Plug Assembly-Gasoline Engine Ignition; Spark Plug,Glow
- Replaces: 55490097
Fits the following Buick Models:
- Cascada | 2016-2017 | Base, Premium, Sport Touring | 4 Cyl 1.6 L GAS
- Encore | 2016-2022 | Base, Convenience, Essence, Leather, Preferred, Preferred II, Premium, Sport Touring | 4 Cyl 1.4 L GAS
- Encore GX | 2020-2024 | Essence, Preferred, Select | 3 Cyl 1.2 L GAS
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Buick Spark Plug Part Number: 12681664
$9.22 MSRP: $16.46
You Save: $7.24 (44%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Spark Plug Assembly-Gasoline Engine Ignition; Spark Plug, Spark Ignition; Spark Plug,Glow
- Replaces: 12568387, 25330840, 12565030, 25161444
Fits the following Buick Models:
- LaCrosse | 2005-2009 | CX, CXL, Super | 6 Cyl 3.8 L GAS, 8 Cyl 5.3 L GAS
- Lucerne | 2006-2008 | CX, CXL | 6 Cyl 3.8 L GAS
- Park Avenue | 1997-2005 | Base, Ultra | 6 Cyl 3.8 L GAS
- Rainier | 2004-2007 | CXL, CXL Plus | 6 Cyl 4.2 L GAS, 8 Cyl 5.3 L GAS
- Regal | 1997-2004 | 25th Anniversary Edition, GS, GSE, LS, LSE | 6 Cyl 3.8 L GAS
- Rendezvous | 2002-2007 | CX, CX Plus, CXL, CXL Plus | 6 Cyl 3.4 L GAS, 6 Cyl 3.5 L GAS
- Terraza | 2005-2006 | CX, CXL | 6 Cyl 3.5 L GAS
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Buick Spark Plug Part Number: 12681662
$11.36 MSRP: $20.28
You Save: $8.92 (44%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Spark Plug, Spark Ignition; Spark Plug,Glow
- Replaces: 12591131
Fits the following Buick Models:
- Lucerne | 2009-2011 | CX, CXL, CXL Special Edition | 6 Cyl 3.9 L FLEX, 6 Cyl 3.9 L GAS
- Terraza | 2006-2007 | CX, CXL | 6 Cyl 3.9 L FLEX, 6 Cyl 3.9 L GAS
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Buick Spark Plug Part Number: 12681660
$9.22 MSRP: $16.46
You Save: $7.24 (44%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Spark Plug Assembly-Gasoline Engine Ignition; Spark Plug, Spark Ignition; Spark Plug,Glow
- Replaces: 12622561
Fits the following Buick Models:
- Enclave | 2010-2024 | Avenir, Base, Convenience, CX, CXL, Essence, Leather, Preferred, Premium | 6 Cyl 3.6 L GAS
- LaCrosse | 2010-2016 | Base, Convenience, CX, CXL, CXS, Leather, Premium, Sport Touring, Touring | 6 Cyl 3.0 L GAS, 6 Cyl 3.6 L FLEX, 6 Cyl 3.6 L GAS
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Buick Spark Plug Part Number: 12681658
$9.22 MSRP: $16.46
You Save: $7.24 (44%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Spark Plug Assembly-Gasoline Engine Ignition; Spark Plug,Glow
- Replaces: 12617309, 12590701, 12620540
Fits the following Buick Models:
- LaCrosse | 2011-2016 | Base, Convenience, CX, CXL, Leather | 4 Cyl 2.4 L GAS, 4 Cyl 2.4 L MILD HYBRID EV-GAS (MHEV)
- Regal | 2011-2017 | Base, CXL, GS, Premium | 4 Cyl 2.0 L FLEX, 4 Cyl 2.4 L FLEX, 4 Cyl 2.4 L GAS, 4 Cyl 2.4 L MILD HYBRID EV-GAS (MHEV)
- Verano | 2012-2017 | Base, Convenience, Leather, Premium, Sport Touring, Turbo | 4 Cyl 2.0 L GAS, 4 Cyl 2.4 L FLEX, 4 Cyl 2.4 L GAS
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Buick Spark Plug Part Number: 12681656
$9.91 MSRP: $17.70
You Save: $7.79 (45%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Spark Plug Assembly-Gasoline Engine Ignition; Spark Plug,Glow
- Replaces: 55585517, 55576026
Fits the following Buick Models:
- Encore | 2013-2021 | Base, Convenience, Essence, Leather, Preferred, Preferred II, Premium, Sport Touring | 4 Cyl 1.4 L GAS
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Buick Spark Plug Part Number: 12680074
$9.55 MSRP: $17.06
You Save: $7.51 (45%)
ADD TO CART
Product Specifications
- Other Name: Spark Plug Assembly-Gasoline Engine Ignition; Spark Plug,Glow
- Replaces: 12627160
Fits the following Buick Models:
- Envision | 2017-2020 | Base, Essence, Preferred | 4 Cyl 2.5 L FLEX, 4 Cyl 2.5 L GAS
- LaCrosse | 2018-2019 | Base, Essence, Preferred, Premium | 4 Cyl 2.5 L MILD HYBRID EV-GAS (MHEV)
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Buick Spark Plug Part Number: 12646780
$10.35 MSRP: $18.48
You Save: $8.13 (44%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Spark Plug Assembly; Spark Plug,Glow
Fits the following Buick Models:
- LaCrosse | 2017-2019 | Avenir, Base, Essence, Preferred, Premium, Sport Touring | 6 Cyl 3.6 L GAS
- Regal Sportback | 2018-2020 | GS | 6 Cyl 3.6 L GAS
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Buick Spark Plug Part Number: 19302723
$2.81 MSRP: $5.02
You Save: $2.21 (45%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Spark Plug Assembly; Spark Plug, Spark Ignition; Spark Plug,Glow
- Replaced by: 19354417
Fits the following Buick Models:
- Regal | 1997-2004 | 25th Anniversary Edition, GS, GSE, LS, LSE | 6 Cyl 3.8 L GAS
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Buick Spark Plug Part Number: 19301814
$9.53 MSRP: $17.02
You Save: $7.49 (45%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Spark Plug Assembly; Spark Plug,Glow
- Replaces: 19256624, 12565996
Fits the following Buick Models:
- LaCrosse | 2005-2006 | CXS | 6 Cyl 3.6 L GAS
- Rendezvous | 2004 | CXL, Ultra | 6 Cyl 3.6 L GAS
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Buick Spark Plug Part Number: 12681663
$9.22 MSRP: $16.46
You Save: $7.24 (44%)
ADD TO CART
Product Specifications
- Other Name: Spark Plug Assembly-Gasoline Engine Ignition; Spark Plug, Spark Ignition; Spark Plug,Glow
- Replaces: 12598004, 12625058
Fits the following Buick Models:
- Rainier | 2004-2007 | CXL, CXL Plus | 6 Cyl 4.2 L GAS
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Buick Spark Plug Part Number: 12681659
$9.22 MSRP: $16.46
You Save: $7.24 (44%)
ADD TO CART
Product Specifications
- Other Name: Spark Plug Assembly-Gasoline Engine Ignition; Spark Plug,Glow
- Replaces: 12647827, 12626906
Fits the following Buick Models:
- Envision | 2016-2020 | Premium, Premium II | 4 Cyl 2.0 L GAS
- Regal | 2014-2017 | Base, GS, Premium, Sport Touring | 4 Cyl 2.0 L GAS
- Regal Sportback | 2018-2020 | Avenir, Base, Essence, Preferred, Preferred II | 4 Cyl 2.0 L GAS
- Regal TourX | 2018-2020 | Base, Essence, Preferred | 4 Cyl 2.0 L GAS
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Buick Spark Plug Part Number: 55504354
$11.44 MSRP: $20.42
You Save: $8.98 (44%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Spark Plug Assembly-Gasoline Engine Ignition; Spark Plug,Glow
Fits the following Buick Models:
- Envision | 2021-2023 | Avenir, Essence, Preferred | 4 Cyl 2.0 L GAS
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Buick Spark Plug Part Number: 19300875
$7.71 MSRP: $13.76
You Save: $6.05 (44%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Spark Plug Assembly; Spark Plug, Spark Ignition; Spark Plug,Glow
- Replaces: 19208525, 19244468, 19158033, 19158029, 5614248, 5614235, 05614248, 19244463, 19207828, 05614235
Fits the following Buick Models:
- Century | 1989-1991 | 3.3L V6
- Lesabre | 1989-1991 | 3.8L V6
- Park Avenue | 1991 | 3.8L V6
- Reatta | 1991 | 3.8L V6
- Regal | 1997-2004, 1990-1991 | 25th Anniversary Edition, GS, GSE, LS, LSE | 3.8L V6, 6 Cyl 3.8 L GAS
- Riviera | 1991 | 3.8L V6
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Buick Spark Plug Part Number: 12688094
$10.33 MSRP: $18.44
You Save: $8.11 (44%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Spark Plug Assembly-Gasoline Engine Ignition; Spark Plug, Spark Ignition; Spark Plug,Glow
Fits the following Buick Models:
- Encore GX | 2020-2024 | Avenir, Essence, Preferred, Select, Sport Touring | 3 Cyl 1.3 L GAS
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Buick Glow Plug Part Number: 5613826
Product Specifications
- Other Name: Plug-Glow; Diesel Glow Plug; Glow Plug,Glow
Fits the following Buick Models:
- Century | 1984-1985 | Custom, Estate, Estate Wagon, Limited, Olympia Limited, T-Type | 4 Cyl 2.5 L GAS, 6 Cyl 2.8 L GAS, 6 Cyl 3.0 L GAS, 6 Cyl 3.8 L GAS, 6 Cyl 4.3 L DIESEL
- Electra | 1984-1985 | Estate Wagon, Limited, Park Avenue, T-Type | 6 Cyl 3.0 L GAS, 6 Cyl 3.8 L GAS, 6 Cyl 4.1 L GAS, 6 Cyl 4.3 L DIESEL, 8 Cyl 5.0 L GAS, 8 Cyl 5.7 L DIESEL
- LeSabre | 1984-1985 | Collector's Edition, Custom, Estate Wagon, Limited | 6 Cyl 3.8 L GAS, 6 Cyl 4.1 L GAS, 8 Cyl 5.0 L GAS, 8 Cyl 5.7 L DIESEL
- Riviera | 1984-1985 | Base, Luxury, T-Type | 6 Cyl 3.8 L GAS, 6 Cyl 4.1 L GAS, 8 Cyl 5.0 L GAS, 8 Cyl 5.7 L DIESEL
View More
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Buick Spark Plug Part Number: 12571535
Product Specifications
- Replaces: 12561466
Fits the following Buick Models:
- Lucerne | 2006-2011 | CXL, CXS, Super | 8 Cyl 4.6 L GAS

Buick Spark Plug

Choose OEM Spark Plug, you're making the optimal decision for superior quality and perfect performance. You can feel confident because each component goes through stringent quality checks. Every part is carefully built to comply with Buick's factory specifications. You'll enjoy a smooth, worry-free installation that fits just right. At ChevyPartsDeal.com, you'll find it easy to get top-quality OEM Buick Spark Plug. You can shop at highly competitive prices and protect your budget. All our genuine Buick parts include a dependable manufacturer's warranty. You'll also appreciate our straightforward return policy and swift delivery services for extra convenience.

The Buick Spark Plug provides an accurate electric spark which ignites the fuel air mixture to provide each engine with fast starts and smooth power. Since 1903, Buick has been relied upon and this tradition is expressed in the gentle ride, silent interior and the lines that are sleek in all the cars and sport utility vehicles. Road noise is reduced with quiet tuning to maintain clear conversations and driver-friendly technology has controls within reach with the support of the modern lifestyle. The brand is a combination of tradition and taking risks, as seen through the Wildcat EV concept which previews an electric future that will be exciting. Stable quality, comfortable seats, and elegant design make the Buick cars feel like home on both commuting to work and visiting family and friends on the weekend, and this proves that even 100 years of experience can help steer each new model. This experience is enhanced by a good Spark Plug which fires reliably thousands of times per minute and therefore, the engines of the entire range will be running clean and efficiently. The Spark Plug is made using erosion-resistant materials and anti-oily build-up materials that keep the gap and heat rating at an optimal level that safeguards the performance and fuel economy. The drivers may watch out for the indicators of dark deposits, closed gaps or grey tips as a sign that the plug requires replacement; however, in most circumstances the plug handles itself in the background, permits good acceleration and prevents idling in every Buick on the road.

Buick Spark Plug Parts and Q&A

Spark Plug
12681664
Q: How to inspect the terminal post, insulator, spark plug boot, and spark plug recess area for damage and proper function on Buick Regal?
A:
Examine the terminal post for indication of damage while checking its stability by twisting and pulling since it must stay fixed. The insulator must be inspected for three abnormal conditions including flashover and carbon tracking and soot which appears when electrical charge conducts between the terminal post and ground. The park plug boot needs inspection for damage while the Cylinder Head Spark Plug recess should be checked for any water or oil or coolant presence since these fluids can create ground arcing through the boot. The inspection should determine if any cracks exist in the insulator because they could enable electrical charging to arc beyond the electrodes (3, 4). A proper check of arcing conditions alongside a measurement of the center electrode to side electrode gap is needed to maintain Spark Plug performance because wide gaps lead to operational problems. Comparing the correct Spark Plug torque is vital because low torque may result in operational problems yet high torque can break the insulator. During inspection check for tracking damage in the area near the insulator instead of the center electrode and shake the Spark Plug to detect broken or worn components especially in side electrode and center electrode. Whenever a rattling noise occurs it reveals internal damage whereas a loose center electrode weakens the spark. An inspection must be conducted to check if Spark Plug electrodes (3, 4) display bridged deposits that could affect the spark gap either partially or completely. Inspect all evidence of platinum pads on electrodes (3, 4) to verify their existence. The inspection of debris in the Cylinder Head Spark Plug recess area is necessary to ensure that damaged or dirty threads do not hinder Spark Plug installation.
Spark Plug
12681657
Q: How to replace a spark plug safely and effectively on Buick Enclave?
A:
Wear safety glasses when removing the Ignition Coil(s) then handle with caution near compressed air. Thoroughly clean the Spark Plug recess zone to stop contaminants from getting into the Cylinder Head because such material might harm the engine or ruin the Cylinder Head threads thus blocking proper insertion of the new plug. Use a thread chaser (Tool Required: You must clean threads with a thread chaser (Tool Required: Thread Chaser). Apply compressed air to blow out debris in the Spark Plug hole after checking that the engine temperature is safe because hot engines can seize threads and harm the Cylinder Head. Next, remove the Spark Plug. Check the vehicle specifications to match new spark plugs with the designated type because improper plug selections will damage the engine critically. All new and reconditioned spark plugs require gap measurement through a round feeler gauge for accuracy because handling can affect pre-set gaps. The opened gap needs to align with the manufacturer's recommended Spark Plug gap requirements. Complete thread insertion should happen without any resistance while seated fully in the Cylinder Head. When needed use a thread chaser to prevent cross-threading and overheating problems during the installation process. After positioning the Spark Plug properly install it keeping torque at 20 n.m (15 lb ft) while also reinstalling any necessary ignition coils.