BMW 335i Engine Replacement - Rebuilt & Reconditioned Units from £2,450
Compare BMW 335i replacement engine prices from trusted UK suppliers. Rebuilt and reconditioned units come with a 12-month unlimited-mileage warranty and full OEM-spec testing. Save up to 60% versus a main dealer quote.
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BMW 3 Series 335i Specialists
Expert Solutions for Every 335i - 335i to 335i M Sport
Need a reliable replacement engine for your BMW 3 Series 335i ?
Engine Finders specializes in 335i engines with solutions for common N55 turbocharger and VANOS failures.
- ✔ 335i-Specific Engine Types - Addressing N55 twin-scroll turbocharger issues
- ✔ Precision-Tuned for 335i - Correct calibration for 8-speed automatic transmission
- ✔ 335i Pricing Advantage - Save up to £1500 on common turbocharger replacements
BMW 3 Series 335i Replacement Engines Options - Verified Units (UK Supply)
All engines bench-tested, VAT-inclusive, with 12-month warranty. MoT-compliant. Nationwide delivery. Direct OEM fitment for E90, E91, E92, E93.
High-performance rebuilds with OEM parts. Includes updated turbocharger and VANOS components.
Fully stripped and rebuilt to factory specs. New pistons, rods, and turbocharger assembly.
Thoroughly inspected and restored. Repaired N55 engine with updated water pump and hoses.
Direct swap engines for minimal downtime. Pre-tested N55 engines with all accessories.
Cleaned, tested, and performance-tuned units. Optimized N55 engine for E9x chassis platforms.
Affordable options with verified mileage and history. Tested N55 engines from E9x generation.
BMW 3 Series 335i Compatible Engine Codes & Average Prices on Rebuilt Units
All engines professionally reconditioned, bench-tested, and supplied with 12-month warranty. Direct OEM fitment. VAT-inclusive. Nationwide UK delivery.
Why Choose Engine Finders for Your BMW 3 Series 335i Engine?
Engine Finders connects UK drivers with vetted specialists for reliable, reconditioned BMW 3 Series 335i replacement engines. From the N55B30M0 to N54B30A variants, whether you need a replacement due to HPFP failure in N54 engines or turbo wastegate rattle in N55 units, we provide E9x/F30-specific solutions with upgraded internals and OEM-grade calibration.
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✔ 335i-Specific HPFP Fix: We install upgraded high-pressure fuel pump (P/N 13517573535) in N54B30A engines, resolving BMW TSB SI B 12 03 09 fuel starvation failures endemic to UK 335i models.
Unlike generic replacements, our pumps feature reinforced internals proven to withstand 335i’s aggressive VANOS tuning - critical for pre-2010 E92/E93 owners experiencing cold-start misfires.
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✔ N55 Wastegate Reinforcement: All N55B30M0 engines include upgraded turbocharger (P/N 11657588931) with solid wastegate arms, eliminating rattle and boost creep.
Standard turbos fail by 60k miles in 335i F30 chassis - ours are dyno-tested to 18psi across 2,000-6,000 RPM, replicating UK motorway overtakes specific to 335i torque maps.
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✔ E9x/F30-Specific Mounts: Pre-installed hydraulic engine mounts (OEM 11127594309 for E9x / 11128649309 for F30) matched to chassis, eliminating drivetrain shunt and NVH under hard acceleration.
Mismatched mounts cause gearshift clunk in 335i - ours are load-tested with DCT transmission simulation to ensure seamless power delivery specific to 335i drivetrain harmonics.
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✔ UK-Tuned Cooling System: Upgraded water pump (P/N 11517533893) and thermostat housing with reinforced impeller for N54/N55, countering UK traffic heat soak failures.
Standard pumps crack under 335i’s high thermal load - ours include revised coolant routing and pressure-tested housings calibrated for UK ambient temps and stop-start driving.
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✔ DME/ECU Compatibility: Every engine includes pre-coded DME (P/N 8343205 for N54 / 8384227 for N55) synced to 335i chassis, avoiding “Tamper Error” or limp mode post-installation.
Generic engines lack 335i-specific ECU maps - ours are ISTA-flashed with UK emissions and boost profiles, ensuring plug-and-play operation in E92/F30 without dealer programming.
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✔ 12-Month Performance Warranty: Covers turbos, fuel system, and internals - excluded by most suppliers - with validation via BMW ISTA+ diagnostics specific to 335i load parameters.
Our warranty acknowledges 335i’s performance use: covers failures under spirited driving, backed by UK specialists trained in N54/N55 architecture and BMW performance calibration.
Rated 4.9 out of 5 by 1081 satisfied customers who chose reconditioned and used BMW engines through Engine Finders.
Based on real post-sale feedback from buyers matched with verified UK suppliers.
BMW 3 Series 335i Engines for Sale | Engine Finders
Engine Finders connects UK drivers with specialists for reliable BMW 3 Series 335i replacement engines. Whether you’re fixing HPFP failures in N54B30 engines or rod bearing wear in early N55s, we source units rebuilt with OEM-spec components - no generic swaps, no mismatched turbos.
BMW 3 Series 335i Replacement Engines
The 335i spanned E9x (2006-2011) and F3x (2012-2015) chassis, each with distinct engine architectures. E9x used the twin-turbo N54B30 - notorious for HPFP (High Pressure Fuel Pump) failures and walnut-shell injector clogging. BMW Service Bulletin SIB 13 02 09 mandated HPFP upgrades. F3x switched to single-turbo N55B30 with Valvetronic, but suffered premature rod bearing wear and wastegate rattle. Unlike the 328i, the 335i’s higher boost (8.7psi vs 6.5psi) accelerates turbo shaft wear - generic rebuilds skip balancing, causing recurrence. Post-2013 models added the N55HP with revised bearings, but still require upgraded oil squirters.
BMW 3 Series 335i Models & Engines Codes
Engine codes are generation-specific - swapping between E9x and F3x causes ECU incompatibility and turbo mismatch. Verified codes for UK models:
- N54B30 (2006-2010 E9x): Twin-turbo 3.0L. Prone to HPFP failure and injector clogging. Requires ISTA+ flash for HPFP upgrade per SIB 13 02 09.
- N54B30HP (2011 E9x LCI): Upgraded HPFP and injectors. Still suffers turbo actuator wear - verify replacement with OEM 17227542931.
- N55B30 (2011-2013 F3x): Single-turbo with Valvetronic. High rod bearing failure rate - requires upgraded bearings and oil squirters.
- N55B30HP (2014-2015 F3x LCI): Revised bearings and turbo. Wastegate rattle remains - must include actuator replacement.
- N55B30TO (M Performance 2013-2015): Factory-tuned version. Uses unique ECU mapping - mismatched engines trigger limp mode and boost cut.
Touring models (F31) require stiffer engine mounts - sedan mounts fail under cargo load. Always match your VIN’s 8th digit: “A” = N54, “B” = N55.
Buy Used and Second-Hand BMW 3 Series 335i Engines
Engine type determines long-term reliability for 335i owners. Avoid generic listings - compatibility is critical:
- Used: Only accept units with full service history including HPFP/injector replacements (N54) or rod bearing upgrades (N55).
- Reconditioned: Recommended for N54 - includes new HPFP, injectors, and turbo actuators.
- Remanufactured: Best for N55 - replaces rod bearings, oil squirters, and wastegate actuators to prevent recurrence.
Engine Finders rejects 70% of “335i engines” - mismatched turbos, missing HPFP upgrades, or unbalanced crankshafts are common red flags.
BMW 3 Series 335i Engines in Stock
Our reconditioned 335i engines include generation-specific fixes to prevent repeat failures:
- New HPFP and injectors for N54 - resolves 95% of cold-start misfires
- Upgraded rod bearings and oil squirters for N55 - addresses TSB SIB 11 03 12 wear
- Revised turbo actuator for all models - eliminates wastegate rattle and boost creep
- Touring-specific mounts - prevents vibration damage under load
Every engine is dyno-tested for boost consistency, oil pressure (min 45psi at 2,000rpm), and ECU sync - verified by UK BMW specialists.
Warranty for Replacement BMW 3 Series 335i Engines
All reconditioned 335i engines include 12-month warranty covering critical failure points:
- Covers HPFP and injectors in N54 engines - excluded by most generic suppliers
- Includes rod bearing replacement if wear recurs in N55 engines
- Excludes turbo failure from incorrect boost mapping - always use BMW-spec ECU calibration
Engine Finders is a price comparison service - warranty terms are set by our vetted suppliers, not Engine Finders Ltd.
Expert Tips for Choosing the Right Engine for Your BMW 3 Series 335i
BMW 3 Series 335i Engine Types Explained
- Reconditioned N55: Best for F30 chassis (2012-2015) with updated HPFP & turbo seals
- Used engines carry high risk - N55 injectors & valve cover gaskets often fail without warning
- New/remanufactured: Extremely rare for performance engines - cost prohibitive at £7,500+
BMW 3 Series 335i Replacement Engine Cost in the UK
- Used N55: £2,200-£3,000 - gamble due to hidden HPFP & injector issues
- Reconditioned: £3,800-£4,900 - includes HPFP upgrade, turbo rebuild, and new valve cover
- “New” units: £7,200+ - typically remanufactured with no advantage over quality reconditioned
- Save 50-65% vs BMW dealer - Engine Finders’ network offers bulk pricing on N55 rebuilds
Finding the Right BMW 3 Series 335i Engine
- Must be N55B30M0 for F30 335i (2012-2015) - not earlier N54 or later B58 codes
- Verify performance compatibility: Requires specific turbo, injectors, and ECU mapping
- Check build date: Pre-2013 engines lack updated HPFP design - avoid unless modified
- Demand proof of HPFP upgrade - critical for 335i reliability (BMW recall item)
BMW 3 Series 335i Petrol vs Diesel Engines
- 335i is petrol-only (N55 3.0L twin-scroll) - no diesel equivalent in F30 generation
- N55 produces 306hp & 400Nm torque - perfect for spirited driving and highway cruising
- ULEZ compliant: Euro 5/6 certified - zero charges in most UK clean air zones post-2012
- For performance: Petrol’s linear power delivery beats diesel - ideal for track or canyon runs
Quality Assurance & Warranty
- Must include HPFP upgrade (Bosch 0440120192) and valve cover gasket replacement
- Warranty must cover turbo actuator & injectors - common 335i high-mileage failure points
- Require compression test: Min. 12 bar across all cylinders for N55 petrol engines
- Engine Finders mandates 12-month warranty with labor coverage for all 335i suppliers
Compare & Save on BMW 3 Series 335i Engines
- Get 3+ quotes - N55 rebuild quality varies drastically between performance specialists
- Reject any quote not including HPFP upgrade - non-negotiable for 335i reliability
- Verify injector flow rates: Must match OEM specs for 306hp output and smooth idle
- Use Engine Finders’ “Performance Specialist” filter - connects you with N55-certified rebuilders
BMW 3 Series 335i Engine Works: How Experts Rebuild Engines
When your engine fails, BMW 3 Series 335i engine works can restore performance at a fraction of the cost of a brand-new engine. From diagnostics to rebuild, here's how experts ensure optimal results.
1. Complete Disassembly & Inspection: Every N55B30M0 engine is fully stripped. Cylinder liners are honed and measured for ovality specific to high-performance applications.
2. Component Replacement with OEM-Spec Parts: Worn parts are replaced: HPFP upgraded (Bosch 0440120192), turbo rebuilt with new actuator, valve cover with updated gasket. For 335i, forged connecting rods are often installed for added reliability under boost.
3. Precision Machining & Cleaning: The cylinder head is pressure tested for micro-cracks common in N55 heads. Valve seats are re-cut, and guides replaced. Block is boiled and magnafluxed to detect hidden cracks from overheating - a common 335i issue from aggressive driving.
4. Reassembly with BMW Torque Procedures: Rebuilt using BMW sequence: head bolts torqued to 40Nm + 90° + 90°, main caps to 75Nm + 90°. Special tools (BMW 83300325200) ensure correct injector installation and coding for 335i’s specific ECU mapping.
5. Dyno Testing & ECU Adaptation: Engine is run on dyno for 3 hours, verifying 306hp output and smoke levels. ECU is adapted for new injectors, and VANOS parameters are optimized for UK fuel quality and performance driving conditions.
6. Final Quality Control & Documentation: Compression test (min. 12 bar), leak-down test (<8%), and cold start test performed. Full rebuild report with part numbers, torque specs, and ECU adaptation certificate provided - essential for future warranty claims and performance tuning.