BMW 7 Series 730i Engine ReplacementCompare Prices & Get Quotes

A BMW 7 Series 730i engine replacement cost depends on the generation and engine code. M54B30 and N52B30 replacements typically range from £800-£1,800 for used units, £2,000-£3,800 for reconditioned, and £3,200-£5,500 for rebuilt with warranty. B48B20 replacements for G11 models cost £1,500-£2,800 used, £3,000-£5,000 reconditioned, and £4,200-£6,500 rebuilt.

• Older M30 and M60 engines are generally cheaper to replace
• N52 valve stem seal failure is the most common reason for 730i replacement
• Fitting adds approximately 10-16 hours of labour at specialist rates

The most common symptom is blue or white smoke from the exhaust on cold startup, clearing after a few seconds. As the seals worsen, you may notice increased oil consumption between services, a slight misfire on startup, and eventually the engine warning light may illuminate.

• This is most common on N52B30 engines in 2005-2015 730i models
• Valve stem seal replacement typically costs £1,500-£2,800 at a specialist
• Ignoring the issue can lead to catalytic converter damage
• Rebuilt engines include upgraded seals to prevent recurrence

Yes - if your BMW 7 Series 730i is otherwise in good condition, a rebuilt engine from £3,200-£5,500 is often worthwhile. With 730i values ranging from £3,000-£30,000 depending on generation, replacement cost typically represents a reasonable proportion of the vehicle's value.

• E65 730i values (£3k-£7k): valve seal repair often better value than full replacement
• F01 730i values (£6k-£12k): rebuilt engine is a sound investment
• G11 730i values (£15k-£30k): replacement easily justified
• 12-month warranty provides peace of mind on the investment

Most BMW 7 Series 730i engine replacements take 1-3 days for supply and fit at a specialist garage. The complexity varies by generation - older M30 and M60 engines are simpler, while modern B48 turbo engines require more precise calibration.

• Engine removal and installation requires specialist equipment
• Long wheelbase (Li/LWB) variants add approximately 1 hour to fitting time
• Collection and delivery options are available nationwide
• Most suppliers can dispatch a replacement engine within 24-72 hours

Yes - every rebuilt BMW 7 Series 730i engine supplied through EnginesMarket comes with a minimum 12-month unlimited-mileage warranty. Used engines typically have 3-6 month warranties, while reconditioned units often include 6-12 months of cover.

• Rebuilt engines: 12-month unlimited-mileage warranty standard
• Extended warranty options are available with some suppliers
• All warranties cover parts and workmanship
• Always confirm exact warranty terms before purchase

The BMW 730i has always been the entry-level petrol 7 Series, while the 740i sits above it with a larger, more powerful engine. In the G11 generation, the 730i uses a 2.0-litre turbo four-cylinder (B48B20, 258hp), while the 740i uses a 3.0-litre turbo straight-six (B58B30, 326hp). In earlier generations, the gap was smaller - the E38 730i used a 3.0-litre V8 (M60B30, 218hp) while the 740i used a 4.0-litre V8 (M60B40, 286hp).

• 730i engines are generally cheaper to replace than 740i units
• 730i offers better fuel economy; 740i offers more performance
• Engine codes differ significantly across all generations
• Enter your registration above to confirm which engine you have