Nissan Altra SR20DE Engines
from £800 to £1,800
Rebuilt units from £800 · Common codes: SR20DE, SR20DET, KA24DE, EM18
Get quotes today from trusted UK Nissan Altra engine specialists. Compare prices on reconditioned, rebuilt and used engines - supply & fit available nationwide.
Nissan Altra SR20DE Engines
from £800 to £1,800
Rebuilt units from £800 · Common codes: SR20DE, SR20DET, KA24DE, EM18
Nissan Altra KA24DE Engines
from £900 to £2,000
Rebuilt units from £900 · Common codes: KA24DE, SR20DE, SR20DET
Nissan Altra EM18 Electric Motors
from £1,500 to £4,500
Rebuilt units from £1,500 · Common codes: EM18

Most replacements completed within 3-5 days.
The table below shows typical UK rebuilt engine costs across Nissan Altra variants - compare failure causes, engine codes, fuel types, and price ranges to benchmark what UK drivers are paying.


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Not sure which variant your Nissan Altra is- Enter your registration number above - we'll identify the exact sub-model, engine code and compatible replacement options instantly.

Every engine code fitted to the Nissan Altra across all generations, with technical specs, compatible variants and trims, known failure points, and average rebuilt prices from UK specialists. Select any engine code to compare quotes.
Extracted from detailed petrol and performance engine families across Nissan Altra variants.

SR20DE - 2.0L Petrol
Main replacement demand comes from timing-chain, cooling-system and performance thermal-management faults.
Compatible variants
Avg. rebuilt price
£800 - £1,800
Supply only
Technical specifications
Common failures
Not sure which engine code?
Can't find your engine code- Enter your registration number above - we'll instantly identify the exact unit, its technical specifications, and live replacement prices from UK Nissan Altra engine specialists. Every rebuilt engine comes with a minimum 12-month unlimited mileage warranty.

The Nissan Altra (R'nessa) petrol engines - SR20DE, SR20DET and KA24DE - dominate UK replacement enquiries. Every rebuilt engine supplied through EngineMarket includes upgraded internal components designed to address the original failure point - plus a minimum 12-month unlimited mileage warranty. Use this section to decide whether repair or replacement...
Nissan Altra SR20DE Timing Chain Rattle
Most affected vehicles
Nissan Altra R'nessa 2.0 G, 2.0 G Auto (1997-2001, SR20DE)
Failure mileage range
70,000-110,000 miles
Typical failure window
Root cause
Original timing chain tensioner loses hydraulic pressure, allowing chain slap and guide wear that can lead to catastrophic interference if ignored.
Repair options & estimated costs (UK ranges)
| Repair tier | Dealer price | Specialist price | What it involves | Longevity / suitability |
|---|---|---|---|---|
| Minor - Preventative Chain Kit | £900 - £1,400 | £550 - £850 | Replace tensioner, guides and chain before failure | Viable if caught early; 40-60k mile extension |
| Full Replacement - Rebuilt SR20DE | £2,200 - £3,500 | £800 - £1,800 | Supply & fit rebuilt engine with upgraded tensioner, bench tested | Lifetime solution; 12-month warranty included |
Our recommendation
If your SR20DE is rattling on cold start but still runs, a preventative chain kit from a specialist offers excellent value. If the chain has jumped or valves are bent, replacement is the only viable option.
Compare rebuilt SR20DE engine prices for your Nissan Altra
Every engine type for the Nissan Altra is available through our UK network with typical price ranges based on variant, engine code and budget.
Compare Nissan Altra engine prices with vetted UK suppliers
All engine types include a minimum 12-month unlimited mileage warranty when sourced through EngineMarket. Prices are typical UK market ranges based on historical quote data from our network and depend on exact engine code, variant, mileage and supplier. Use our free comparison tool above - enter your registration to get tailored quotes for your specific Nissan Altra within hours.

Every displacement fitted to the Nissan Altra is listed below, with compatible engine codes, production years and common failure points to help you identify the correct replacement.
The 2.0L SR20 family powered most R'nessa variants from 1997-2001, offering a balance of efficiency and performance. The naturally-aspirated SR20DE was the volume seller, while the turbocharged SR20DET defined the GT performance trim.
Engine Code(s)
SR20DE, SR20DET
Compatible Models (UK)
R'nessa 2.0 G, 2.0 G Auto, 2.0 GT, 2.0 GT Turbo
Power output
Verified by registration
Common Failure Points
Timing chain tensioner wear (SR20DE), turbo oil seal failure (SR20DET)
Production Years: N30, 1997-2001
Compare Nissan Altra 2.0L petrol engine prices
Choose your Nissan Altra engine by fuel type to compare realistic replacement prices, known issues, and compatible UK supply options - from early SR20DE to the rare EM18 electric motor.
Petrol engines dominate the Nissan Altra (R'nessa) replacement market, with SR20DE, SR20DET and KA24DE units covering all UK import variants from 1997-2001.
Common Nissan Altra Petrol Engine Families
Found In
Known For
Typical Petrol Models
Petrol engines dominate the Nissan Altra (R'nessa) replacement market, with SR20DE, SR20DET and KA24DE units covering all UK import variants from 1997-2001.
Common Nissan Altra Petrol Engine Families
Found In
Known For
Typical Petrol Models
The EM18 electric motor powered the ultra-rare Altra EV fleet vehicle (1998-2002), with replacement requiring specialist EV knowledge due to extremely limited UK availability.
Nissan Altra Electric Engine Codes
Found In
Important Notes
Not sure which fuel type your Nissan Altra has- Enter your registration number above to instantly identify your engine code, fuel system and compatible replacement options - all backed by a minimum 12-month unlimited mileage warranty from UK Nissan Altra specialists.

This section covers all major engine changes across the Nissan Altra (R'nessa) production timeline, organised so owners can quickly identify their engine and compare rebuilt engine prices from UK specialists.
⚙Key Changes
▣Main Engines
SR20DE- 2.0L petrol (R'nessa 2.0 G / 2.0 GL)
▰Popular Models
🔧Known For
Engine Codes Covered:
SR20DE