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OEM Parts vs. Aftermarket: What's Best for Your Vehicle?

1991 Chevrolet K2500 Pickup

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At AutoNation, we understand the importance of keeping your vehicle in optimal condition. When replacing vehicle components, choosing between OEM (Original Equipment Manufacturer) and aftermarket parts significantly impacts performance, reliability, and resale value. As one of America's largest suppliers of both OEM and aftermarket components, AutoNation offers extensive expertise in helping vehicle owners make informed decisions. Understanding the key differences between these options helps protect your automotive investment.

Understanding OEM Parts

OEM parts come directly from your vehicle's manufacturer or authorized partners. These components match the original parts installed during production, ensuring perfect fitment and reliable performance. While typically more expensive than aftermarket alternatives, OEM parts like control modules maintain factory specifications and preserve warranty coverage. AutoNation sources OEM components directly from manufacturers to guarantee authenticity.

Evaluating Aftermarket Options

Aftermarket parts offer varying quality levels and price points. High-quality aftermarket manufacturers sometimes improve upon original designs, offering enhanced performance or durability. However, lower-quality alternatives might compromise vehicle function. Critical components like brake lines demand careful consideration when choosing aftermarket options.

When to Choose OEM

Complex electronic components, safety systems, and body panels typically warrant OEM parts. These components require precise specifications to maintain proper vehicle function. The sensors in modern vehicles, for example, need exact calibration to communicate with onboard computers. AutoNation's certified parts specialists help identify situations where OEM components provide crucial advantages.

Smart Uses for Aftermarket Parts

Certain maintenance items and upgrades work well with quality aftermarket parts. Non-critical components like floor mats, windshield wipers, and universal accessories often provide good value in aftermarket form. Performance enthusiasts might prefer aftermarket parts specifically designed to enhance vehicle capabilities beyond factory specifications.

Warranty Considerations

Vehicle warranties often require OEM parts for covered repairs. Using aftermarket components could void warranty coverage for related systems. AutoNation's parts specialists provide detailed warranty information to help customers maintain proper coverage while managing repair costs effectively.

Making the Right Choice

Consider your vehicle's age, intended use, and long-term ownership plans when selecting parts. Newer vehicles under warranty benefit from OEM components, while older vehicles might achieve cost savings with quality aftermarket alternatives. AutoNation's experienced staff helps evaluate these factors for each specific situation.

Why settle for less when AutoNation offers the best for your vehicle's needs?

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19418995 - Electrical: Ignition Coil Kit for GM Image

Ignition Coil Kit

GM 19418995
An induction coil, used with a distributor for timing, to transform a vehicles battery voltage to a much higher voltage needed to...
$71.04
MSRP $114.58
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38% Off
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23114024 - Front Drive Axle: Front Differential Drive Pinion Gear Kit for GM Image

Front Differential Drive Pinion Gear Kit

GM 23114024
This GM Genuine Part is designed, engineered, and tested to rigorous standards and is backed by General Motors Original equipment parts...
$459.18
MSRP $660.33
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30.5% Off
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23502596 - Engine: Engine Crankshaft for GM Image

Engine Crankshaft

GM 23502596
All models. Express, savana. This GM Genuine Part is designed, engineered, and tested to rigorous standards and is backed by General...
$1,280.35
MSRP $1,475.06
Save $194.71
13.2% Off
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10409635 - Cooling System: 15 P.S.I. Radiator Cap for GM Image

15 P.S.I. Radiator Cap

GM 10409635
Helps seal and maintain pressure in your vehicle's engine cooling system This GM Genuine part is designed, engineered and tested to...
$13.92
MSRP $21.59
Save $7.67
35.5% Off
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18060018 - : Front Disc Brake Caliper Bolt Inner Bushing for GM Image

Front Disc Brake Caliper Bolt Inner Bushing

GM 18060018
This GM Genuine Part is designed, engineered, and tested to rigorous standards and is backed by General Motors
Positions: Front
$6.51
MSRP $10.09
Save $3.58
35.5% Off
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19121908 - Suspension: Front Drive Axle Clutch Shaft for GM Image

Front Drive Axle Clutch Shaft

GM 19121908
This GM Genuine Part is designed, engineered, and tested to rigorous standards and is backed by General Motors
$252.44
MSRP $357.16
Save $104.72
29.3% Off
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22071950 - Body: Front Passenger Side Manual Window Regulator for GM Image

Front Passenger Side Manual Window Regulator

GM 22071950
Right side. All models. Manual. This GM Genuine Part is designed, engineered, and tested to rigorous standards and is backed by General...
Positions: Front Right, RIGHT
$207.19
MSRP $334.18
Save $126.99
38% Off
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89059111 - Front Drive Axle: Universal Joint Kit for GM Image

Universal Joint Kit

GM 89059111
This GM Genuine Part is designed, engineered, and tested to rigorous standards and is backed by General Motors A device that connects...
$194.75
MSRP $273.43
Save $78.68
28.8% Off
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15739983 - Suspension: Steering Knuckle Bushing for GM Image

Steering Knuckle Bushing

GM 15739983
All models. Helps dampen noise, friction, and movement This GM Genuine Part is designed, engineered, and tested to rigorous standards and...
$21.08
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26.5% Off
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15975315 - Body: Seat Track Reinforcement for GM Image

Seat Track Reinforcement

GM 15975315
Front bench seat. Full bench seat. Crew cab rear bench seat. Reinforcement panel or structure used for the Seat Track.
$20.67
MSRP $26.70
Save $6.03
22.6% Off
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13502674 - Electrical: Black Multi-Purpose Relay for GM Image

Black Multi-Purpose Relay

GM 13502674
Helps connect or disconnect power to vehicle accessories This GM Genuine Part is designed, engineered, and tested to rigorous standards...
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15036132 - Body: Body Side Silverado Name Plate for GM Image

Body Side Silverado Name Plate

GM 15036132
Extended cab, 1999-02, all, 2003-07, without SS, silverado. Without denali, Escalade, silverado. Enhances appearance of vehicle side body...
$69.18
MSRP $92.61
Save $23.43
25.3% Off
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