Mercedes-Benz GLK Class Engine ReplacementCompare Prices & Save

Key points

• • OM651 2.1L diesel rebuilt engines average £2,200-£3,400 supply-only UK
• • OM642 3.0L V6 diesel replacements range £3,500-£5,300 depending on variant
• • M272/M276 petrol V6 engines cost £3,400-£5,900 for rebuilt units
• • Supply and fit installation typically adds £700-£1,300 to engine price
• • All rebuilt engines include minimum 12-month unlimited mileage warranty

Key points

• • OM651 timing chain tensioner wear affects GLK 200/220/250 CDI pre-facelift models
• • Cold-start rattling is the primary warning sign before catastrophic failure occurs
• • Rebuilt OM651 engines include upgraded tensioner kits as standard prevention measure
• • Facelift OM651 units (2012+) feature revised tensioner design reducing failure risk

Key points

• • Post-2012 OM651 diesel engines feature upgraded timing tensioners reducing failure rates significantly
• • M276 direct-injection petrol V6 resolves M272 balance shaft issues but needs carbon cleaning
• • OM642 V6 diesel offers robust towing capability but requires oil cooler seal monitoring
• • Regular oil changes every 10,000 miles extend all GLK engine lifespans considerably

Key points

• • OM642 oil cooler seals fail between 80,000-130,000 miles on GLK 350 CDI models
• • Coolant mixing with oil creates milky sludge visible on dipstick or filler cap
• • Rebuilt OM642 engines include upgraded silicone seals preventing repeat leakage issues
• • Early detection via regular oil checks can avoid catastrophic bottom-end damage

Key points

• • GLK Class X204 models retain strong residual values when mechanically sound and well-maintained
• • Rebuilt engines include 12-month unlimited mileage warranty protecting your investment long-term
• • Supply and fit by CDI-trained specialists ensures correct installation and preserves resale value
• • Compare total replacement cost against part-exchange offers before deciding to sell

Key points

• • Regular oil changes every 10,000 miles prevent premature wear across all GLK engine families
• • OM651 timing chain inspection at 60,000 miles avoids catastrophic failure on early models
• • OM642 oil cooler seal checks during servicing prevent coolant contamination and bearing damage
• • Using Mercedes-approved spec oils maintains turbocharger and injection system longevity

Key points

• • Used engines cost £1,100-£2,400 but carry unknown history and limited warranty coverage
• • Rebuilt engines (£2,200-£5,300) include failure-point upgrades and 12-month unlimited mileage warranty
• • Remanufactured units (£3,600-£5,800) use new OEM components throughout for near-factory reliability
• • All options supplied through EngineMarket include bench testing and specialist verification

Key points

• • OM651.901, .911, .921 and .941 share block design but differ in turbo and emissions systems
• • ECU coding and immobiliser matching required for any engine code swap on GLK Class
• • Emissions compliance (Euro 5/6) must be maintained to pass MoT after engine replacement
• • Specialist fitting networks handle coding and calibration ensuring legal roadworthy installation

Key points

• • 12-month unlimited mileage warranty covers rebuilt OM651, OM642 and M272/M276 engine replacements
• • Warranty applies to supply-only and supply-and-fit installations across UK specialist network
• • Upgraded failure-point components (timing chains, seals) included under same warranty terms
• • Bench testing documentation provided with every rebuilt GLK Class engine for peace of mind

Key points

• • DVLA registration lookup instantly confirms engine code, fuel type and variant for GLK Class
• • Engine code stamped on block near oil filter housing visible during inspection or servicing
• • OM651 variants power GLK 200/220/250 CDI while OM642 serves GLK 320/350 CDI models
• • M272/M276 codes identify petrol V6 engines in GLK 280/300/350 variants respectively