Renault Scenic 1.9 dCi Engine ReplacementCompare Prices & Get Quotes

A Renault Scenic 1.9 dCi engine replacement typically costs £1,800-£4,000 supply-only for a rebuilt unit, depending on engine code (F9Q 804 / F9Q 812 / F9Q 870). Used engines start from £400-£1,400. Fitting adds approximately £650-£1,040 in labour (10-16 hours at independent specialist rates). Main dealer fitted prices are typically 30-50% higher.

• Used F9Q 804/F9Q 812: £500-£1,100
• Used F9Q 870/F9Q 872: £600-£1,400
• Reconditioned: £1,200-£2,800
• Rebuilt: £1,800-£4,000

Common signs include loss of power, black smoke from the exhaust, a whistling or screeching noise from the turbo, and increased oil consumption. A faulty EGR valve is often the root cause - it either sticks open or closed, causing premature turbo failure. If you notice any of these symptoms, have the turbo and EGR inspected immediately.

• EGR valve replacement: £150-£350 at specialist
• Turbo replacement: £800-£1,500 at specialist

The "check injection" warning is commonly caused by injector failure. Injector leak-off (excessive fuel return) is a common symptom. If ignored, injector failure can lead to high-pressure fuel pump failure, which can contaminate the entire fuel system and result in a £7,000 repair bill.

• Injector testing: £100-£200
• Single injector replacement: £300-£600 at specialist

The 1.9 dCi F9Q engine uses a timing belt (not a chain). The official replacement interval is typically 72,000 miles or 5 years - whichever comes first. A failed water pump bearing can cause the belt to track incorrectly, leading to catastrophic engine failure.

• Timing belt kit (parts): £100-£250
• Timing belt replacement (labour): £300-£600 at specialist

For a Scenic II (2003-2009) worth £800-£3,000, a rebuilt engine at £1,800-£4,000 plus fitting may represent 80-120% of the vehicle's value. If the car is otherwise in good condition with a strong gearbox and low rust, a used engine or targeted repair may be more cost-effective. For Scenic III (2009-2016) worth £2,000-£6,000, a rebuilt engine may represent 50-80% of the vehicle's value. For Grand Scenic seven-seat models (£2,500-£8,000+), replacement is usually viable due to family demand.

The earlier Scenic I and early Scenic II 1.9 dCi used an 8-valve SOHC design (F9Q 740, F9Q 804, F9Q 812). Later Scenic II and Scenic III models used a 16-valve DOHC design (F9Q 870, F9Q 872). The 16-valve engine produces more power (131hp vs 102-120hp) and is generally more refined, but has more complex emissions systems (DPF, AdBlue on later models) and can be more expensive to repair. Both use a timing belt, not a chain.