BMW 3 Series 325e Engine Replacement Compare Prices & Get Quotes

A BMW 3 Series 325e engine replacement typically costs £1,800-£3,500 for a rebuilt unit supply-only, or £2,500-£4,800 fitted by a specialist. Used engines start from around £800-£1,500, while reconditioned units range from £1,500 to £2,200.

• Prices reflect the M20B27's increasing rarity and classic car status
• Rebuilt engines carry a 12-month unlimited-mileage warranty
• Supply & fit adds £400-£800 in labour

The most critical sign is simply age - if the belt is over 4 years old or has covered more than 50,000 miles, it needs replacing regardless of symptoms. Other warning signs include a squealing noise from the front of the engine, visible cracks or fraying on the belt (if inspected), or rough running.

• The M20B27 is an interference engine - belt failure bends valves
• Preventative replacement (£400-£700) is far cheaper than engine replacement (£1,800-£3,500)
• Always check service history before buying a 325e

It depends on the car's condition and your intentions. A 325e in average condition is worth approximately £3,217-£11,824. For a car valued under £5,000, a used engine or repair is often more sensible. For a clean, low-mileage example with rising classic values, a rebuilt engine with warranty is a justifiable investment.

• Matching-numbers engines matter for collector value
• For sub-£5k cars, consider a used engine (£800-£1,500) rather than a rebuild
• For cars with classic potential, a rebuilt unit preserves originality and reliability

The 325e uses the M20B27 'Eta' engine - a 2.7-litre long-stroke design with a 81mm stroke and 84mm bore, producing 121hp and 170 lb-ft of torque at just 3,250rpm. The 325i uses the M20B25 - a 2.5-litre short-stroke design with a 75mm stroke and the same bore, producing 168hp but with less low-end torque. The 'e' stands for 'Eta' - efficiency.

• 325e: torque-focused, relaxed cruiser, better fuel economy
• 325i: higher-revving, more peak power, sportier character
• Both are interference engines with timing belts

A typical BMW 3 Series 325e engine replacement takes 2-3 days for a specialist workshop, assuming the replacement engine is available. The E30 platform is relatively straightforward to work on.

• Allow 2-3 days for supply & fit through a specialist
• Supply-only engines are typically dispatched within 1-2 working days
• Timing belt replacement is a half-day job

Every rebuilt and reconditioned BMW 3 Series 325e engine supplied through EnginesMarket carries a minimum 12-month unlimited-mileage warranty. Used engines typically come with a shorter warranty (30-90 days) depending on the supplier - always confirm exact terms before purchasing.

• Rebuilt: 12 months / unlimited mileage minimum
• Reconditioned: typically 6-12 months
• Used: 30-90 days, supplier-dependent