Nissan Altima 2.5 Engine Common Problems

Nissan Altima 2.5 Engine Common Problems & Preventative Maintenance Practices

The Nissan 2.5L, model QR25DE engine has been around for 22 years as it was initially introduced in 2001. While it is known as a dependable, powerful engine, like most other engines on the market, it is not without the occasional performance issues. Thankfully, these engine glitches are easily discovered and can be repaired before they cause irreparable damage. Engine retailers like have seen these problems over and over again.

Upgrades Made to Enhance Performance:

Nissan Altima 2.5 Engine Common Problems
Bestseller No. 1
Genuine Nissan 5W-30 Oil Change Kit 5 Quarts 15208-65F0E
  • Genuine Nissan 5W-30 Oil Change Kit
  • Qty. 5 Quarts of Genuine Nissan Motor Oil 5W-30
  • Includes Genuine Nissan Oil Filter 15208-65F0E (Small Nissan Filter)
  • Includes Copper Washer 11026-JA00A
  • Manufactured By ExxonMobil Oil Corporation
Bestseller No. 2
Genuine Nissan 0W-20 Oil Change Kit 15208-65F0E
  • Genuine Nissan 0W-20 Oil Change Kit
  • Qty. 5 Quarts of Genuine Nissan Motor Oil 0W-20
  • Includes Genuine Nissan Oil Filter 15208-65F0E (Small Nissan Filter)
  • Includes Copper Washer 11026-JA00A
  • Manufactured By ExxonMobil Oil Corporation
Bestseller No. 3
Nissan Genuine Synthetic 0W-20 Motor Oil 999PK-000W20N (Case of 6)
  • Genuine Nissan Synthetic 0W-20 Motor Oil
  • Suitable For All Makes & Models That Require 0W-20 Motor Oil
  • Meets The Requirements of ILSAC GF-5 API,SN,SM,SL
  • Manufactured By ExxonMobil Oil Corporation
  • Qty. (6 Quarts)
SaleBestseller No. 4
Valvoline High Mileage with MaxLife Technology SAE 5W-20 Synthetic Blend Motor Oil 5 QT
  • MaxLife Technology prevents engine breakdown with 40% better wear protection than the industry standard
  • Includes seal conditioners to reduce oil consumption and oil leaks in high mileage engines.
  • Added detergents reduce sludge, corrosion, rust and deposits to help keep motors clean inside and ensure a smooth-running engine.
  • Advanced friction-fighting additives help maximize performance and improve fuel efficiency.
  • Meets or exceeds all requirements of ILSAC GF-6A, API SP, API SN with SN Plus, API SN
SaleBestseller No. 5
Mobil 1 Advanced Fuel Economy Full Synthetic Motor Oil 0W-20, 5 Quart
  • Mobil 1 Advanced Fuel Economy full-synthetic motor oil 0W-20 is low-viscosity to help improve fuel economy.*
  • Utilizes Mobil 1’s signature Triple Action Formula to deliver outstanding engine performance, protection, and cleanliness
  • Helps protect critical engine parts for up to 10,000 miles between oil changesm,** controlling oxidation to prevent oil breakdown and maintaining excellent viscosity
  • Meets ILSAC GF-6 standards to help provide low-speed pre-ignition (LSPI) and timing chain wear protection while keeping your engine clean
  • Helps extend engine life by working to prevent damaging deposits and sludge buildup
Bestseller No. 6
Valvoline Advanced Full Synthetic SAE 0W-20 Motor Oil 5 QT
  • Advanced protection against the four main causes of engine breakdown: wear friction heat and deposits
  • 40% better wear protection vs. industry standards as tested in the Sequence IVB engine test
  • 25% better deposit protection with superior engine cleaning detergents as tested in the GMOD engine test
  • Full synthetic formula offers 24X stronger protection against engine-killing contaminants than the leading full synthetic motor oil
  • Meets or exceeds all requirements of ILSAC GF-6A, API SP, API SN with SN Plus, API SN, GM dexos 1 Gen 5
Bestseller No. 7
SET 3 PCS NEW Genuine OEM 15208-65F0E Engine Oil Filter + 4STEED MOTORS 11026-JA00A 11026-01m02 Drain Plug Gasket Compatible with Nissan Infiniti - Rogue Frontier Pathfinder Quest Murano Titan Sentra
  • TOP QUALITY / GUARENTEED【Interchange Part Number】: (Engine oil filter) 1520865F0E, 15208-65F00, 15208-65F01 and 15208-65F0D. (Drain plug gasket) 11026-JA00A.
  • 【Features】: (Engine oil filter) Original part manufactured with a unique blend of natural and synthetic materials in the filter media for better oil filtration and increased engine protection. (Drain plug gasket) High quality and durable part made of aluminum, fixed the same as OEM.
  • 【Package Includes】: Package of 8 x 3 x 3 x 3 x 3 in. with three (3 pcs.) OEM 15208-65F0E engine oil filters and three (3 pcs.) pieces of 4STEED MOTORS 11026-JA00A drain plug gasket
  • 【Recommendations】: Before making the purchase, FIRST CONSULT your trusted MECHANIC to make sure they are the parts you need and check in the table below the compatibility and the workshop of your vehicle with the product
  • 【Compatible with】: Rogue Sport, Frontier, Pathfinder, Quest, Murano, Titan, Sentra, Versa, Juke, 370Z, Armada, Altima, NV 200 y otros (ver descripción más abajo). (INFINITI) FX35, EX35, EX37, FX37, G20, G25, G35, G37, I30, I35, JX35 y otros (ver descripción más abajo o garaje)
Bestseller No. 8
Set of 3 Genuine OEM Engine Oil Filter 15208-9E01A + Drain Plug 4STEED MOTORS 11026-JA00A compatible with Nissan Infiniti
  • 【Interchange Part Number】: (Engine Oil Filter) 15208-9E01A 152089E000 15208-31U0A and 15208-9E000 (Drain Plug Gasket) 11026-JA00A. It is important to verify that the part number of what you are ordering applies to your vehicle. This way you can be sure that you are getting the right part
  • 【Features 】: (Engine Oil Filter) Original part made with a unique blend of natural and synthetic materials in the media for better oil filtration and enhanced engine protection. (Drain Plug Gasket) High quality and durable part made of aluminum, fixed same as OEM
  • 【Package Includes】: Three (3 pcs) engine oil filter and three (3pcs) drain plugs gaskets
  • 【Recommendations】: It is recommended to replace filter at the time of changing the car's oil, at least once a year. By changing only the oil without replacing the filter, you will only mix a clean lubricant with a dirty one, affecting its performance. Before making the purchase, FIRST CONSULT your trusted MECHANIC to make sure it is the part you need
  • 【Compatible with】: Nissan Infiniti A32 2003-1995, Maxima 2002-1994, Altima 2006-1997, Pathfinder 2010-1995, Pickup 2010-1997, A32 2010-1994 See more on our description below
SaleBestseller No. 9
Castrol Edge 5W-30 Advanced Full Synthetic Motor Oil, 5 Quarts
  • 3X stronger against viscosity breakdown than leading full synthetic, based on Kurt Orbahn test in 5W-30 grade
  • 10X better high temperature performance, as measured in Sequence IIIH engine test vs. API SP test limit
  • 6X better wear protection
  • 1.4X better sludge protection, as measured in Sequence VH engine test vs. API SP test limit
  • Meets ILSAC GF-6 to prevent low speed pre ignition (LSPI) and timing chain wear protection
Bestseller No. 10
FRAM Ulta Synthetic Automotive Replacement Oil Filter, Designed for Synthetic Oil Changes Lasting up to 20k Miles, XG6607 with SureGrip (Pack of 1)
  • EASY INSTALLATION: Engine oil filter comes with Suregrip non-slip surface making it easy to remove and implement your filter without slippery mess ups. Perfect for the DIYer like yourself, just screw new filter on until gasket reaches base contact and tighten.
  • DURABLE DUAL LAYER: Compare to standard oil filters, FRAM Ultra Synthetic provides 99%+ filtration efficiency with pleated media that entraps all kinds of dirt and exhaust for a cleaner output.
  • SUPERIOR ENGINE PROTECTION: FRAM car oil filter is composed of a slick silicone anti-drainback valve, delivering superior start-up engine protection with up to 3X the hot oil resistance. Keep your filter clean without the dangerous mess.
  • HIGH TEMP RESISTENCE: Filter combats high heat pressure for longer shelf life with advanced high nitrile gasket for extended durability and quality. Precision coil spring with glass-fiber-reinforced nylon poppet.
  • 20,000 MILE CAPABILITY: Reliable for high mileage, FRAM Ultra Synthetic offers proven protection up to 20,000 miles. FRAM Ultra Synthetic delivers reliable performance for the person who lives on the road.

Since the Nissan 2.5 engine was originally manufactured and introduced, the 2.5L engine has gone through several upgrades, which helped the engine’s performance on the road.

Upgrades made to the engine increased fuel efficiency and engine consistency/reliability. Enhancements were also made to reduce engine emissions and improve the overall performance of the engine.

Some of the latest upgrades made to the newest model QR25DE engine (upgrades effective in 2007 and newer models) include:

  • A wider diameter intake manifold
  • Updated piston shape which helps to support higher compression
  • Cam profile upgrades
  • Piston, bearing, and additional coatings to reduce friction and heat when in use
  • Extra engine mount for added security
  • Higher resolution and horsepower for a more reliable and powerful engine

Features of the Nissan 2.5 engine:

Here are some of the specs found in the popular Nissan Altima engine:

  • It was introduced to the marketplace in 2001.
  • It offers between 175 to 182 horsepower, which varies depending on the model and year.
  • It has around 180 Torque.
  • It comes with a DOHC Valvetrain design to support consistent, reliable performance.
  • Features Inline-4 configuration.
  • It is manufactured with reliable aluminum block and head materials.
  • It has a 5:1 to a 10.5: 1 compression ratio.

Frequent Issues (and Repair Suggestions) with the Nissan 2.5L Engine:

Nissan Altima 2.5 Engine Common Problems

While it is considered to be one of the most reliable engines currently being used, there have been some issues, which occurred primarily on engines built from 2002 through 2006, which used early design concepts.

The company analyzed the engine after preliminary issues with earlier models and since 2007, there have been very few issues since the redesign.

According to and others, here are a few of the issues that some Nissan owners may experience:

  • Issue: Exhaust manifold which uses pre-cat (pre-catalytic converters): This can break and cause damage to the engine because the materials used are not as sturdy as required.
  • Solution: Installing an affordable aftermarket exhaust manifold and adding a heat shield.
  • Issue: Intake and power valve screws: This issue is most often seen in Sentra and Altima models. These screws can enter the engine damaging the walls or head of the cylinder as well as the catalytic converter.
  • Solution: The company redesigned the screws to correct the issue. These new “butterfly” screws offer a long-term repair for models made from 2002 through 2005.
  • Issue: Oil leaks: Like many vehicle engines, the older they get, the more they may experience leaks. In the 2.5L engine, the key area for leaks is the valve cover gasket, which is made from a rubber-type material, which can falter when it is exposed to extreme heat.
  • Solution: When leaks occur, replace the cover gasket.
  • Issue: Timing chain tensioners can become faulty: This is a rare occurrence in the 2.5L engines, but may occur. This could lead to the timing chain faltering, resulting in loss of engine power and overall poor performance.
  • Solution: Have your timing chain checked. If it shows wear, you may need to have the timing belt or tensioners replaced

About the Author Leroy

Leave a Comment:

Popular posts