BMW · Known Issues
2015 BMW 7 Series Problems: 9 Known Issues
2015 model year · 200+ owner reports · Updated September 2026
2015 · All trims · All engines
Choose the year and equipment for your written issues and visual request.
2015 model year · 200+ owner reports · Updated September 2026
2015 · All trims · All engines
Choose the year and equipment for your written issues and visual request.
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According to Au7o's analysis of 200+ owner reports, the 2015 BMW 7 Series has 9 documented known issues, with 3 rated critical. The most serious are N57 Diesel EGR Cooler Internal Coolant Leak - Intake Manifold Fire Risk (740Ld xDrive) ($0-$0 repair), N63TU1 750i Oil-Consumption and Turbo-Leak Diagnosis and N63 Timing Chain Guide Breakage and Chain Stretch - F01/F02 750i ($6,000-$14,000 repair). The most commonly reported issue is iDrive Head Unit and CIC/NBT Module Failures with 200 owner reports. Across all issues with published estimates, repair costs range from $250 to $14,000. DIY maintenance guides at au7o.io.
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According to Au7o's analysis of 200+ owner reports, the 2015 BMW 7 Series has 9 documented issues. The most frequently reported are: N57 Diesel EGR Cooler Internal Coolant Leak - Intake Manifold Fire Risk (740Ld xDrive), N63TU1 750i Oil-Consumption and Turbo-Leak Diagnosis, N63 Timing Chain Guide Breakage and Chain Stretch - F01/F02 750i. Of these, 3 are rated critical and should be addressed promptly.
The 2015 BMW 7 Series has 9 known issues documented across 200+ owner reports. 3 issues are rated critical: N57 Diesel EGR Cooler Internal Coolant Leak - Intake Manifold Fire Risk (740Ld xDrive) and N63TU1 750i Oil-Consumption and Turbo-Leak Diagnosis and N63 Timing Chain Guide Breakage and Chain Stretch - F01/F02 750i. Prospective buyers should inspect for these issues and factor potential repair costs into their purchase decision. Regular maintenance following the manufacturer's schedule helps prevent many common problems.
Repair costs for known BMW 7 Series issues range from $0 to $14,000, depending on the specific problem and whether you choose DIY or professional repair. The most critical issue, N57 Diesel EGR Cooler Internal Coolant Leak - Intake Manifold Fire Risk (740Ld xDrive), typically costs $0-$0 to repair. Au7o provides step-by-step DIY maintenance guides that can help reduce repair costs.
The 740Ld xDrive uses the N57 inline-six diesel, whose EGR cooler can crack and leak coolant internally. The coolant mixes with diesel soot inside the EGR path, and at high EGR gas temperatures those wetted soot particles can smolder, melting the plastic intake manifold and creat… Repairs typically run $0-$0. Severity: high.
BMW SIB 01 01 22 identifies specified U.S.-specification F01/F02 750i, 750Li and ALPINA B7 variants from model years 2013-2015 with the N63TU1 engine for an oil-consumption diagnosis and related-repair settlement path. The lawsuit alleged excessive oil use and BMW denied the alle… Severity: high.
The N63 twin-turbo V8 places the turbos inside the vee, and the trapped heat cooks the plastic timing chain guides until they crack and break apart. Debris from a shattered guide lets the chain go slack, so it stretches, throws timing correlation codes, and can jump a tooth - at… Repairs typically run $6,000-$14,000. Severity: high.
The 7 Series iDrive infotainment system experiences head unit failures across generations, with the CIC (Car Information Computer) in F01 models and NBT (Next Big Thing) in G11 models being particularly problematic. Symptoms include screen blackouts, random reboots, navigation fr… Repairs typically run $500-$2,500. Severity: medium.
The N63's direct injectors sit in the hottest part of a hot-vee engine and fail early, either leaking down and washing the cylinder or losing flow entirely. The result is a persistent misfire isolated to one cylinder that follows the injector when you swap it to another bore - th… Repairs typically run $300-$2,400. Severity: medium.
The N63 V8 engine uses high-pressure direct injection fuel pumps (HPFP) that commonly fail between 60,000-100,000 miles. The HPFP is driven by the engine camshaft and operates at extremely high pressures (2,900+ PSI). Internal wear and seal failures cause fuel pressure loss, lead… Repairs typically run $1,500-$3,000. Severity: medium.
The N63 engine uses BMW's Valvetronic system (variable valve lift) which commonly fails. The Valvetronic eccentric shaft motor wears out or burns out, causing rough running and limp mode. The system also suffers from carbon buildup on the Valvetronic mechanism. Failure typically… Repairs typically run $2,000-$4,000. Severity: medium.
BMW 7 Series models equipped with air suspension commonly experience compressor and air strut failures. The air suspension compressor runs frequently and wears out between 60,000-120,000 miles. Air struts develop leaks from deteriorating rubber airbags. Symptoms include suspensio… Repairs typically run $2,500-$6,000. Severity: medium.
The 740i/740Li built with the N55 single twin-scroll turbo develops a metallic chattering or rattling from the turbo at light throttle and on deceleration, typically between about 2,000 and 3,500 rpm, and often loudest right after a cold start. The cause is wear in the turbine-si… Repairs typically run $250-$2,500. Severity: low.
Content on this page was compiled with AI assistance using NHTSA complaints, TSBs, owner reports, and public automotive data. While we strive for accuracy, this information may contain errors. Always verify repair procedures and specifications with your vehicle's service manual or a qualified mechanic.