Nissan Altima 2002–2006 2.5L Engine | QR25

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Strong and torque-focused 2.5L DOHC inline-4 engine imported from Japan 🇯🇵. Compression-tested and ready for installation — well known for its low-end torque and everyday drivability, making it a dependable replacement for Nissan mid-size platforms.

Engine code: QR25

Configuration: Inline-4 DOHC 16-valve

Displacement: 2488 cc

Mileage: 45,000 – 65,000 miles (verified low-mileage JDM import)

Compression ratio: ~9.6 : 1 (factory spec; verified consistent compression across cylinders)

Fits:

  • Nissan Altima 2.5L (2002 – 2006)

  • Nissan Sentra SE-R 2.5L (2002 – 2006)

  • Nissan X-Trail 2.5L (JDM / select markets)

  • Nissan Serena 2.5L (JDM)

Smooth daily performance with strong mid-range torque — the QR25 is widely used for stock replacements and long-term reliability in early-2000s Nissan vehicles.

Fitment list is provided for reference only. Compatibility may vary by market, transmission (manual/CVT), ECU, and emissions configuration. Please confirm fitment with a certified mechanic before purchasing to verify your exact engine model, or contact us and we’ll be happy to assist.

  • ACHIEVING

    4.8

    average rating

  • With

    95%

    positive reviews

  • LESS THAN

    3%

    return rate

Are your products tested?

All of our JDM engines and transmissions are carefully tested and inspected before sale. They are first checked in Japan, then inspected again once they arrive in the U.S. to make sure they meet our quality standards.

We take pride in offering reliable used JDM parts, and your satisfaction is always our priority.

Does it come with a warranty?

We offer a 90-day limited replacement warranty for engines, covering head and block.
For automatic transmissions, 30-day limited replacement warranty.
For manual transmissions, 10-day startup warranty from date of purchase.
Some exceptions apply.

For more details: refer to our warranty and return policy here.

How fast is shipping?

Orders are usually shipped within 24–48 hours after full payment is received.

After fulfillment, delivery usually takes 1–10 business days, depending on the destination and carrier.

What's the returns policy?

We’re always happy to help if there’s an issue with your order. Since our products are used automotive parts, returns and warranty claims need to be reviewed and approved before anything is sent back.

To start a return or warranty claim, please follow the steps on our return page here:
How to Make a Return

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