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The Ultimate Guide to Buying a High-Mileage Nissan Altima: Engine, CVT, and Everything in Between

Published on: December 16, 2025

The Nissan Altima has secured its place as a go-to midsize sedan for those who value a blend of style, comfort, and respectable fuel economy. When navigating the used car market, especially for higher-mileage examples, a discerning eye is your best asset. The difference between a dependable daily driver and a vehicle plagued with expensive issues often comes down to the health of its engine and Continuously Variable Transmission (CVT). At Paapaa Motors, we are your trusted partners for high-quality refurbished and pre-owned engines, and our team of experts has crafted this comprehensive guide to empower your purchasing decision.

This deep dive will illuminate the critical areas to inspect on a high-mileage Nissan Altima, with a laser focus on its powertrain. We will explore common problems tied to both the engine and the CVT across various model years, present a detailed pre-purchase inspection checklist, and offer a transparent look at potential replacement costs. Our goal is to arm you with the knowledge to find a truly reliable vehicle.

Why a Pre-Owned Engine is a Smart Move

Before delving into the Altima's specifics, it's beneficial to understand why a pre-owned or refurbished engine is a viable and intelligent option when a replacement is necessary. This path offers considerable advantages over buying a new engine or an entirely new vehicle.

Here are the key benefits:

Inspecting the Core of the Altima: The Engine and CVT

A high-mileage Nissan Altima can represent excellent value, but its longevity is intrinsically linked to the condition of its engine and transmission. Here’s a detailed look at what you need to scrutinize.

The Engine: A Closer Look

Nissan Altimas have been offered with both 4-cylinder (most notably the QR25DE) and V6 (the VQ35DE) engines. While these engines are generally considered reliable, certain issues can surface with accumulated mileage.

The CVT: A Point of Critical Focus

Nissan's adoption of the Continuously Variable Transmission (CVT) is a hallmark of the Altima, providing smooth acceleration and enhanced fuel efficiency. However, it has also been a point of concern for many owners, with certain model years proving to be more problematic.

Engine vs. CVT: What's the Bigger Concern?

When assessing a high-mileage Altima, the CVT often emerges as the more immediate and financially significant concern. While engine problems can be substantial, the failure rate and associated repair costs for the CVT have been more prominent across many model years.

Prioritize the CVT inspection if: You are considering an Altima from a model year known for transmission issues, particularly from 2013-2018. The symptoms of a failing CVT can be subtle at first but can escalate to a complete and expensive failure.[23]

Prioritize the Engine inspection if: The vehicle has a questionable or incomplete maintenance history, or if you observe clear signs of neglect like low oil levels or unusual engine noises. While robust, these engines are not impervious to issues stemming from poor maintenance.

Ultimately, both the engine and CVT demand a meticulous inspection, but a problematic CVT often carries a greater financial risk for the buyer. Paapaa Motors maintains a comprehensive inventory of quality-inspected engines for situations where a replacement is the most practical solution.

Your Pre-Purchase Inspection Checklist

Here is a practical checklist to guide you through your inspection of a high-mileage Nissan Altima.

Maintenance History

Always insist on seeing the vehicle's service records. Consistent oil changes and, critically, regular CVT fluid changes (often recommended around every 25,000 miles) are essential for the longevity of these components.

Vehicle Test Drive

Fluid Checks

Professional Inspection and Warranty

Why Choose Paapaa Motors?

At Paapaa Motors, we recognize the importance of trust and reliability when it comes to automotive parts. We are dedicated to providing our customers with the highest quality pre-owned and refurbished engines.

Understanding Replacement Costs

Should you find yourself in a position where a major component needs replacement, it's important to be aware of the potential costs. A re manufactured 2.5L 4-cylinder engine for a Nissan Altima can range from approximately $3,000 to over $5,100, excluding labor. The cost for a CVT replacement can be similarly high, with prices often falling between $3,500 and as much as $8,000 at a dealership.[24] At Paapaa Motors, we are committed to offering competitive pricing on our high-quality used engines to provide a more affordable solution. For instance, you could find a quality pre-owned engine from us in the $2,000 to $4,000 range, depending on the mileage and model year.

Final Thoughts

A high-mileage Nissan Altima can be a fantastic and reliable vehicle, provided you approach the purchase with diligence. The key to a successful acquisition lies in a comprehensive inspection of the engine and, most importantly, the CVT. By being aware of the common warning signs and prioritizing a vehicle with a solid maintenance history, you can significantly reduce your risk.

Remember, a pre-purchase inspection is a small investment that can save you thousands in the long run. If the need for a replacement engine arises, choosing a reputable supplier like Paapaa Motors ensures you are getting a dependable part that will keep your Altima on the road for many more miles to come.

If you're ready to buy...

Call us at +1 (346)781-5699
Visit us at 6208 S Rice Ave Suite C1, Houston, TX 77081.
Website: www.paapaamotors.com

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