Mini Service History

Timing chain

No scheduled replacement

CHAIN, both tests applied and agreeing. Camshaft test: Laser Tools' 5740 kit locks the camshafts on N54 B30 A, N55 B30 A and S55 B30 A and is described as 'For chain drive petrol engine' (D-S1). Opposite-kit test: AUTODOC lists 142 timing chain kits for the E92 335i with engine-specific chain lengths (144 links N54, 148 links N55; D-S2) and 66 kits for the S55 M3, also 148 links (D-S4), while the timing BELT category returns 'Unfortunately, item Timing belt for ... is not available' for both cars (D-S3, D-S5). One drive only. No BMW-published replacement interval (BMW's CBS schedules no timing-chain change) and no catalogue interval found, so years/miles are null. Interference status not stated by any fetched source. Years: AUTODOC dates the E92 335i from 2006; the upper bound 2020 is the task's S55 end year. One entry covers all three engines because drive and interval are identical and DVLA reports all three at 2,979 cc.

Timing chain

No scheduled replacement

CHAIN, both tests applied and agreeing. Camshaft test: the N63/S63 camshaft alignment kit (OEM tool numbers 83302249117 etc.) is 'Special designed to locate the camshaft in TDC position. Checking and adjusting the timing chain tensioner' and lists S63B44O0 and S63B44T0 applications (D-S9). Opposite-kit test: AUTODOC lists 26 timing chain kits for the F10 550i xDrive N63 B44 B (D-S10) while the timing BELT category says 'Unfortunately, item Timing belt for BMW 5 Saloon (F10) 550 i xDrive 330 KW is not available' (D-S11). No replacement interval published (catalogue text says only 'Observe service information'). Interference not stated. The N63 has a widely reported chain-wear reputation, but no BMW UK document on it was fetched, so revised stays false.

Timing chain

No scheduled replacement

Named among engines with 'timing chain concerns' by a UK independent BMW specialist (S17), which is treated here as confirmation of chain drive. No fixed BMW-published replacement interval or specific B37 failure pattern found — the specialist's list is generic across several engine codes rather than B37-specific detail. Re-sourced 2026-10-01: Laser Tools 6997 'Timing Chain Tool Kit' to 'check and set the camshaft and crankshaft timing on the post 2014 … 1.5L 3 cylinder (B37)' (B37 C15A / D15A; W-S16); AUTODOC lists 90 chain kits and no belt kit ('not available') for the F20 116d B37 D15 A (W-S34, W-S35).

Timing chain

No scheduled replacement

Chain drive is well established for the B-series family generally (confirmed directly for the related B48/B58 four/six-cylinder units by an independent technical write-up and a genuine BMW parts listing, S26/S27); No B38-specific chain source or interval was found — treated as reported by family resemblance, not confirmed directly for this displacement. Re-sourced 2026-10-01 with B38-SPECIFIC evidence (no longer family resemblance only): Laser Tools 7242 'Timing Chain Kit' for B38/B48/B58 with camshaft holding tools (W-S17); Lymm 1.5i timing chain kit for B38 A15 A/C, B38 B15 A, B38 K15 A, 1499cc (W-S23); AUTODOC lists 47 chain kits and 'Unfortunately, item Timing belt kit … is not available' for the F20 118i B38 B15 A (W-S32, W-S33).

Timing chain

No scheduled replacement

Named among engines with 'timing chain concerns' by a UK independent BMW specialist (S17); No fixed BMW-published replacement interval or B47-specific failure pattern found — the specialist's list groups several engine codes without per-engine detail, and this is a materially newer, revised design than the N47 it replaced. Re-sourced 2026-10-01: Laser Tools 6997 'Timing Chain Tool Kit' for the post-2014 2.0L 4-cylinder B47 (B47 C20A/B, D20A/B; W-S16); Lymm IWIS B47 kit with three chains (W-S21); AUTODOC lists 120 chain kits and no belt kit ('not available') for the F30 320d B47 D20 A (W-S36, W-S37).

Timing chain

No scheduled replacement

Rear-mounted timing chain, confirmed directly for the B48 by an independent technical write-up: 'The timing chain is at the back of the engine' / 'The oil pump is chain driven and also at the back of the engine' (S26). A genuine BMW timing-chain-guide-rail part listing (11318631844) confirms chain drive is shared across the related B46D/B58 family (S27). No fixed BMW-published replacement interval or reported failure pattern found — independent trade assessment is that 'the B48 doesn't carry a known timing chain weakness'. Interference status not stated.

Timing chain

No scheduled replacement

Same B48 combustion engine as the non-hybrid entry; see that entry's timing note (S26, S27).

Timing chain

No scheduled replacement

Named among engines with 'timing chain concerns' by a UK independent BMW specialist (S17), consistent with the chain-driven B-series family generally (S26, S27 confirm the related petrol B48/B58 chain layout). No fixed BMW-published replacement interval or B57-specific failure pattern found.

Timing chain

No scheduled replacement

Rear-mounted timing chain per the same family confirmation as the B48 (S26 covers the B48 directly; the genuine BMW part 11318631844 is explicitly listed for 'B58C / B58D / B58TU' as well as 'B46D', S27). No fixed BMW-published replacement interval found. Interference status not stated.

Timing chain

No scheduled replacement

CHAIN, both tests applied and agreeing. Camshaft test: Sealey's VSE5666 'Chain Drive' kit supplies 'Camshaft setting and flywheel locking tools to cover BMW M47/TU/T2 and M57/TU/T2 diesel engines', listing 525d among its applications (D-S18). Opposite-kit test: AUTODOC lists 102 timing chain kits for the E60 525d 2.5 M57 D25 (D-S16) and its belt category says 'Unfortunately, item Timing belt for BMW 5 Saloon (E60) 525 d 130 KW is not available', under a block headed '525 d 2497 CCM Diesel' (D-S17). No replacement interval published. Interference not stated. Years are AUTODOC's 2004-2010 for the E60 525d; earlier 2,497 cc BMW diesels (e.g. an E39 525d) were not checked and are left to the unresolved list rather than assumed to be the same engine. The task brief also names a 2.5-litre 325d; no fetched source shows a 2,497 cc 325d, so it is not listed as a model.

Timing chain

No scheduled replacement

CHAIN, both tests applied and agreeing. Camshaft test: the N12/N14 camshaft alignment master set has 'Camshaft locking fixtures' and is 'required any time the timing chain must be removed for camshaft, cylinder-head or timing chain service' (D-S22). Opposite-kit test: AUTODOC lists 136 timing chain kits for the R56 Cooper S N14 B16 A/AB, 2006-2010 (D-S23); its belt category's only item is a Frankberg belt with '6 ribs' 'with water pump' - a ribbed water-pump drive belt filed under the wrong category, not a toothed cam belt (D-S24). No replacement interval published. Interference not stated. Kept separate from bmw.json's 'N13/N18 1.6 4-cyl turbo petrol (Prince family, BMW/MINI shared)' because N12/N14 are distinct engine codes and precede it; the drive answer is the same, so the 2010 overlap year is harmless. The 1.4 MINI One version of this family is not covered here.

Timing chain

No scheduled replacement

CHAIN. Camshaft test: Laser Tools 4408 is for 'Mini One 2001-06 (W10B16AA), Mini Cooper 2001-06 (W10B16BA) and Mini Cooper S 2002-06 (W11B16AA)', 'petrol chain driven engines', and contains a camshaft sprocket holding tool (OEM 11 8 250) and a tensioner assembly tool (D-S20). Opposite-kit test: Lymm Engine Parts sells a timing CHAIN kit for W10 B16 A / W11 B16 A, 1598cc, R50/R53 2001-2006 and R52 2004-2008 (D-S19); AUTODOC lists 70 chain kits for the R50 Cooper W10 B16 A, and its belt category shows only DT Spare Parts 7.54891 - the same belt AUTODOC maps to the S85 V10, i.e. an artefact (D-S21). No belt kit found in any catalogue checked. No replacement interval published. Interference not stated. brands is set to mini because this engine was never fitted to a BMW-badged car.

Timing chain

No scheduled replacement

Timing chain, rear-mounted on the BMW-badged N13 per an independent parts-retailer blog: 'Timing chain and tensioner wear on poorly maintained cars' (S19). No fixed BMW-published replacement interval found; a UK independent BMW specialist recommends preventative replacement 'between 70,000 - 100,000 miles' as its own advice, not a BMW figure, and lists this engine family loosely among 'timing chain concerns' (S17). Interference status not stated by any fetched source.

Timing chain

No scheduled replacement

Chain-driven. BMW of North America's own class-action-settlement bulletin (S9) documents a genuine, BMW-acknowledged timing-chain defect on early-production N20 engines that could cause 'sudden engine failure and a loss of power' (S9, BMW's own document). BMW's remedy was a 7-year/70,000-mile limited warranty extension (SI B11 03 17, referenced within S9) followed by a US class-action settlement extending diagnosis/repair coverage to 8 years/100,000 miles for affected MY2012-2015 US-spec N20/N26 vehicles. This is a US-market document; no equivalent UK-specific BMW bulletin was found, though the N20 was sold in the UK with the same engine architecture. 'revised': true reflects BMW's acknowledged design/warranty response, not a routine service-interval change. Interference status not stated. Re-sourced 2026-10-01: Laser Tools 6173 for N20/N26 'For chain driven petrol engines… for dismantling and assembling intake and exhaust camshaft', with a timing chain pre-tensioning tool (W-S15); Lymm N20B16/N20B20/N26B20 timing chain kit (W-S22); AUTODOC lists 93 chain kits for the F30 320i against a single 'timing belt' item that is a 6-rib alternator belt (W-S30, W-S31).

Timing chain

No scheduled replacement

Timing CHAIN, with a reputation for premature chain wear and failure, worst on earlier builds — a trade-reported pattern, not a BMW-published finding. A UK independent BMW specialist (S17) names the N47 among engines with 'timing chain concerns' and recommends preventative replacement 'between 70,000 - 100,000 miles' as its own advice, not a BMW figure. Interference status not stated by any fetched source. Re-sourced 2026-10-01: Laser Tools 5196 for N47/N57 'For chain driven diesel engines… without disturbing the camchain set-up' (W-S13) and Laser 7034 camshaft drive chain wear indicator listing N47 D20 (W-S14); Lymm N47D16/N47D20 kit with three chains (86, 70 and 48 link; W-S18); AUTODOC lists 259 chain kits for the E90 320d N47 D20 A, and its only 'timing belt kit' items are 6-rib auxiliary/water-pump belts (W-S24, W-S25).

Timing chain

No scheduled replacement

Shares the N47 family's timing chain and the reported wear/failure pattern of the 2.0-litre N47D20; no MINI-specific 1.6-litre confirmation of the same failure rate was found, so this is carried over from the family entry as reported, not confirmed for this displacement specifically. Re-sourced 2026-10-01 with N47C16-specific evidence: Laser Tools 5196 ('For chain driven diesel engines', MINI N47 C16A/U1, C16K1, C16U1; W-S13) and Laser 7034 camshaft drive chain wear indicator (N47 C16A; W-S14); Lymm/Dayco N47C16A/N47C20A kit with 86- and 70-link cam chains plus a 48-link oil-pump chain (W-S19); AUTODOC lists 231 chain kits and no belt kit ('not available') for the R56 Cooper D N47 C16 A (W-S26, W-S27).

Timing chain

No scheduled replacement

Timing chain drive. A UK independent BMW specialist names the N57 among engines with 'timing chain concerns' (S17) alongside the N47, though independent trade commentary elsewhere (not independently re-verified via a fetched source here) generally describes the N57 as less failure-prone than the N47 due to lower vibration/reduced sprocket loads on the straight-six layout. No fixed BMW-published replacement interval found. Interference status not stated. Re-sourced 2026-10-01: Laser Tools 5196 covers the 3.0L N57 'For chain driven diesel engines' (W-S13) and Laser 7034 camshaft drive chain wear indicator lists N57 D30A-C (W-S14); Lymm N57D30 full kit with three chains (W-S20); AUTODOC lists 154 chain kits and no belt kit ('not available') for the F10 530d N57 D30 A (W-S28, W-S29).

Timing chain

No scheduled replacement

CHAIN. Opposite-kit test: AUTODOC lists four timing chain kits (febi 178886/186453, SWAG 33 10 4728/33 11 0400) for the X4 M Competition S58 B30 A (D-S7) and its timing BELT category says 'Unfortunately, item Timing belt for BMW X4 (G02, F98) M Competition 375 KW is not available' (D-S8). A genuine BMW S58 timing chain (11 31 8 053 399) is sold for the F97 X3 M, F98 X4 M, G80 M3, G82 M4 and G87 M2 (D-S6). Camshaft test only indirectly satisfied: no dedicated S58 cam-locking tool page was fetched, but with no belt catalogued for this engine the chain is the only candidate cam drive. No replacement interval published anywhere fetched. Interference not stated. Note DVLA's 2,993 cc for this petrol engine is the same figure as the N57/B57 3.0 diesels; fuel separates them.

Timing chain

No scheduled replacement

CHAIN to the intake camshafts, with the exhaust camshafts GEAR-driven off the intake sprockets. Camshaft test: BMW's own M-engines technical training manual states 'The primary camshaft drive is provided by two timing chains to drive the intake camshafts (one chain for each intake camshaft). The exhaust camshafts are driven by a "gear-to-gear" connection between the intake camshaft sprocket and the exhaust camshaft sprocket' (D-S12). Opposite-kit test: AUTODOC lists seven timing chain kits for the S85 B50 A (iwis, febi, VAICO, SWAG, VEMA, AIC; D-S14); its belt category shows one belt with no banner, but that same DT Spare Parts 7.54891 is also mapped to a 1.6 MINI, so it is an artefact and AUTODOC cannot settle this car (D-S15); ECS Tuning's S85 timing catalogue has chain, chain tensioner, guide-rail and VANOS categories and no belt at all, and its kit replaces 'timing chains & oil pump drive chain' (D-S13). A separate chain drives the oil pump - not a cam drive. No replacement interval published anywhere fetched. Interference not stated.