BMW 4 Series Engines for Sale | Engine Finders

Engine Finders is the UK's largest BMW engines marketplace for top-quality BMW replacement engines, including BMW 4 Series engines - whether you're looking for a reconditioned, remanufactured, or low-mileage used engine. Simply enter your registration or browse our engine list to find a compatible match at highly competitive prices.

BMW 4 Series Replacement Engines

The BMW 4 Series is a premium executive car that has long been the benchmark for driving dynamics, luxury, and practicality. First introduced in 1975 (E21), the 3 Series has evolved through multiple generations, refining its performance, technology, and efficiency. The F30 generation (2012–2019) introduced turbocharged engines and advanced driver assistance features, while the latest G20 lineup (2019–present) offers mild-hybrid technology, improved aerodynamics, and a more refined interior. With powerful trims like the M340i and fuel-efficient diesels like the 320d, the 3 Series remains one of the UK’s best-selling premium sedans.

Whether you need a replacement due to timing chain issues, overheating, or general wear and tear, Engine Finders makes it easy to locate the right 3 Series engine, fast.

BMW 4 Series Models & Engine Codes

BMW’s 4 Series engines range from efficient 4-cylinder petrols to performance-tuned turbocharged 6-cylinders. Whether you're driving an early F32 or a newer G22 M Sport, we can help you find the exact engine code match.

Here are some of the popular BMW 4 Series engine codes we regularly stock:

• BMW 420i, 430i, 440i
  Petrol Engine Codes: B48A20, B58B30
  Known for fuel economy and smooth performance in city driving.
• BMW 420d, 430d, 435d
  Diesel Engine Codes: B47D20, B57D30
  Great torque and long-range economy; early N47 models may have timing chain concerns.
• BMW M440i, M4 (Performance Models)
  Performance Engine Codes: B58B30, S58B30
  Turbocharged inline-6 engines with exceptional power and tuning potential.
• BMW 4 Series F32, F33, F36, G22 (Body Styles)
  Available in petrol, diesel, plug-in hybrid, and mild-hybrid variants across trims and generations.

We can also help source rare engine variants, including the 435i, 430e hybrid, and models with xDrive all-wheel-drive systems. If you're unsure about compatibility, just send us your reg or VIN – we’ll do the hard work for you.

Buy Used and Second-Hand BMW 4 Series Engines

Engine Finders connects you to a vast network of trusted UK suppliers with a wide range of BMW 4 Series engines in stock. Whether you need:

• Used Engines
• Reconditioned Engines
• Rebuilt Engines
• Remanufactured Engines

Our vetted sellers ensure every BMW 4 Series engine meets our quality standards, whether you’re after a budget-friendly used unit or a factory-spec remanufactured version.

BMW 4 Series Engines in Stock

From everyday petrol to diesel-efficient or performance-driven models, we offer a wide-range of BMW 4 Series used and reconditioned engines.

Reconditioned engines often include brand-new internal parts, such as:

• New Pistons, Rings, Bearings, Gaskets, Chains, and Seals Precision-balanced components and multi-point quality checks
• Every engine is tested for compression, leaks, and performance before dispatch.

Warranty for Replacement BMW 4 Series Engines

All BMW 4 Series replacement engines listed through Engine Finders come backed by supplier warranties for added peace of mind. Warranty periods include:

• Reconditioned Engines: 6 months to 2 years
• Used Engines: 30 days to 6 months
• Remanufactured Engines: 1 to 2 years
• International shipping available (from selected suppliers)

Please Note: "Warranty terms vary by engine type and supplier. We recommend inquiring directly with your chosen supplier for specific terms and conditions, as Engine Finders is a price comparison website."