Nissan Altima Engine ReplacementCompare Prices & Save

A complete Nissan Altima engine replacement typically costs between £1,800 and £3,800 depending on the engine code, condition type and whether you choose supply-only or full supply and fit. The QR25DE 2.5L unit sits at the lower end of this range, while the VQ35DE 3.5L V6 and hybrid variants command higher prices due to complexity and labour requirements. All quotes include minimum 12-month warranty coverage from vetted UK specialists.

Your Nissan Altima will be fitted with one of several factory engine codes, most commonly the QR25DE for 2.5L models or the VQ35DE for 3.5L variants. Early 2002-2006 imports may use the QR20DE 2.0L, while 2007-2010 hybrids use the PR25DD. You can verify your exact code instantly by entering your registration number or checking the VIN plate under the bonnet.

Yes, every engine sourced through the EngineMarket network includes a minimum 12-month unlimited mileage warranty as standard. Rebuilt and reconditioned units typically receive extended coverage options up to 24 months depending on the supplier. Warranty terms cover internal mechanical failures and manufacturing defects, but exclude labour for removal and refitting unless specified.

A complete Nissan Altima engine replacement typically takes 2 to 4 working days from engine arrival to vehicle handover, depending on garage workload and fitting complexity. The 2.5L inline-four usually requires 6-8 hours of labour, while the 3.5L V6 takes 8-10 hours due to tighter engine bay clearance and additional VVT sensor calibration.

Engine replacement becomes necessary on a Nissan Altima when internal damage exceeds 60% of component value, or when multiple failure points overlap, such as timing chain stretch combined with piston scoring. Minor issues like sensor faults or isolated leaks can be repaired, but catastrophic knocking, seized components or severe oil burn require full unit replacement for long-term reliability.

Yes, you can supply your own Nissan Altima engine, but EngineMarket recommends using network-sourced units to guarantee warranty validity and compatibility verification. Customer-supplied engines may still face fitting refusal if they fail pre-installation compression tests or lack proper documentation, which voids the fitting warranty and leaves you liable for garage labour costs.

A rebuilt Nissan Altima engine focuses on replacing known failure components like timing chains and piston rings while retaining the original block. A reconditioned unit undergoes full disassembly, machining to OEM tolerances and replacement of all wear items. Used engines are breaker-sourced, tested only for baseline compression and sold as-is with limited warranty coverage.

A like-for-like engine replacement on your Nissan Altima does not change your insurance group or premium, provided the replacement matches original factory specifications and displacement. You must declare the engine number change to your insurer and update the V5C logbook, but standard policies accept documented replacements without penalty or re-rating.

The late-model QR25DE (2010-2012) is widely considered the most reliable Nissan Altima engine due to updated timing chain tensioners, improved oil control rings and refined ECU mapping. Early VQ35DE units suffer from oil consumption issues, but post-2007 blocks with upgraded VVT actuators offer excellent longevity when serviced regularly and paired with correct oil specifications.

You need your V5C logbook, current MOT certificate and a valid invoice from the engine supplier to complete a Nissan Altima engine replacement and register the new engine number with the DVLA. Specialist fitters will also provide a warranty certificate, compression test report and fitting receipt, which are essential for insurance claims and future resale verification.