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

1995 Chevrolet G20

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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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12361259 - Suspension: Upper Control Arm for GM Image

Upper Control Arm

GM 12361259
10-20, gas. G10-20, G1500-2500 vans. Right side. 2wd. Suspension component that connects and provides pivotal movement of the Steering...
Positions: Front Right Upper, RIGHT
$221.51
MSRP $313.41
Save $91.90
29.3% Off
Fits Your Vehicle
23312178 - Universals & Rear Axle: Front Differential Bearing with Cup and Cone for GM Image

Front Differential Bearing with Cup and Cone

GM 23312178
Low friction rotating elements that support the drive axle differential carrier within the axle or final drive housing This GM Genuine...
Positions: Rear
$49.04
MSRP $77.84
Save $28.80
37% Off
Fits Your Vehicle
12453171 - Engine: Engine Camshaft Bearing for GM Image

Engine Camshaft Bearing

GM 12453171
This GM Genuine Part is designed, engineered, and tested to rigorous standards and is backed by General Motors Engine Camshaft Bearing.
$60.05
MSRP $83.61
Save $23.56
28.2% Off
Fits Your Vehicle
19244500 - : Engine Oil Pressure Sensor for GM Image

Engine Oil Pressure Sensor

GM 19244500
This GM Genuine part is designed, engineered and tested to rigorous standards, and are backed by General Motors Engine Oil Pressure...
$89.28
MSRP $126.34
Save $37.06
29.3% Off
Fits Your Vehicle
15699867 - Body: Outer Panel Weatherstrip for GM Image

Outer Panel Weatherstrip

GM 15699867
Sliding type. Rubber seal around the door frame, aka Weatherstrip.
$140.93
MSRP $189.42
Save $48.49
25.6% Off
Fits Your Vehicle
20626174 - Body: Multi-Purpose Bracket for GM Image

Multi-Purpose Bracket

GM 20626174
2014-2017, with lane departure. 4 door. 2 door. With head up display. With denali. 2011-2017 without lane departure. Mirror...
$5.69
MSRP $7.32
Save $1.63
22.3% Off
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15807693 - Universals & Rear Axle: Multi-Purpose Gasket for GM Image

Multi-Purpose Gasket

GM 15807693
All. 8.6 ring rear. S-series. G10-20 vans. Express, savana. 3/4 ton. Blazer/Sonoma/S10. 1500. 8.50" & 8.625" ring gear without...
Positions: Rear
$16.46
MSRP $22.40
Save $5.94
26.5% Off
Fits Your Vehicle
93442037 - Engine: Engine Oil Pump for GM Image

Engine Oil Pump

GM 93442037
This GM Genuine Part is designed, engineered, and tested to rigorous standards and is backed by General Motors An engine oil pump for a...
$194.49
MSRP $275.17
Save $80.68
29.3% Off
Fits Your Vehicle
19421487 - Steering: Pump Pulley for GM Image

Pump Pulley

GM 19421487
For A/C Belt. Exc.Auxiliary Heater. Stamped #NL. With 6 Groove. Wo/6 Groove. Power Steering Pump Pulley.
$115.94
MSRP $164.02
Save $48.08
29.3% Off
Fits Your Vehicle
10128316 - Engine: Crankshaft Front Oil Seal for GM Image

Crankshaft Front Oil Seal

GM 10128316
Seals the openings on either end of the crankshaft for a tight seal Withstands heat and pressure to help prevent the engine from leaking...
Positions: Front
$25.43
MSRP $35.40
Save $9.97
28.2% Off
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14012699 - Universals & Rear Axle: Multi-Purpose Washer for GM Image

Multi-Purpose Washer

GM 14012699
This GM Genuine Part is designed, engineered, and tested to rigorous standards and is backed by General Motors
Discontinued
Fits Your Vehicle
10108445 - : Distributor Gasket for GM Image

Distributor Gasket

GM 10108445
This GM Genuine Part is designed, engineered, and tested to rigorous standards and is backed by General Motors Distributor Mounting...
$3.48
MSRP $5.40
Save $1.92
35.6% Off
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